added MCAD for gears; updated bom with fixes; removed old X carriage; added ATX holde...

diff --git a/doc/wilson-bom.ods b/doc/wilson-bom.ods
dissimilarity index 97%
index 9918cb8..3add292 100644 (file)
Binary files a/doc/wilson-bom.ods and b/doc/wilson-bom.ods differ

diff --git a/scad/MCAD/2Dshapes.scad b/scad/MCAD/2Dshapes.scad
new file mode 100644 (file)
index 0000000..2d10577
--- /dev/null
+++ b/scad/MCAD/2Dshapes.scad
@@ -0,0 +1,163 @@
+/*
+ *  OpenSCAD 2D Shapes Library (www.openscad.org)
+ *  Copyright (C) 2012 Peter Uithoven
+ *
+ *  License: LGPL 2.1 or later
+*/
+
+// 2D Shapes
+//ngon(sides, radius, center=false);
+//complexRoundSquare(size,rads1=[0,0], rads2=[0,0], rads3=[0,0], rads4=[0,0], center=true)
+//roundedSquare(pos=[10,10],r=2)
+//ellipsePart(width,height,numQuarters)
+//donutSlice(innerSize,outerSize, start_angle, end_angle) 
+//pieSlice(size, start_angle, end_angle) //size in radius(es)
+//ellipse(width, height) {
+
+// Examples
+/*use <layouts.scad>;
+grid(105,105,true,4)
+{
+       // ellipse
+       ellipse(50,75);
+
+       // part of ellipse (a number of quarters)
+       ellipsePart(50,75,3);
+       ellipsePart(50,75,2);
+       ellipsePart(50,75,1);
+
+       // complexRoundSquare examples
+       complexRoundSquare([75,100],[20,10],[20,10],[20,10],[20,10]);
+       complexRoundSquare([75,100],[0,0],[0,0],[30,50],[20,10]);
+       complexRoundSquare([50,50],[10,20],[10,20],[10,20],[10,20],false);
+       complexRoundSquare([100,100]);
+       complexRoundSquare([100,100],rads1=[20,20],rads3=[20,20]);
+
+       // pie slice
+       pieSlice(50,0,10);
+       pieSlice(50,45,190);
+       pieSlice([50,20],180,270);
+
+       // donut slice
+       donutSlice(20,50,0,350);
+       donutSlice(30,50,190,270);
+       donutSlice([40,22],[50,30],180,270);
+       donutSlice([50,20],50,180,270);
+       donutSlice([20,30],[50,40],0,270);
+}*/
+//----------------------
+
+// size, top left radius, top right radius, bottom right radius, bottom left radius, center
+module complexRoundSquare(size,rads1=[0,0], rads2=[0,0], rads3=[0,0], rads4=[0,0], center=true)
+{
+       width = size[0];
+       height = size[1];
+       //%square(size=[width, height],center=true);
+       x1 = 0-width/2+rads1[0];
+       y1 = 0-height/2+rads1[1];
+       x2 = width/2-rads2[0];
+       y2 = 0-height/2+rads2[1];
+       x3 = width/2-rads3[0];
+       y3 = height/2-rads3[1];
+       x4 = 0-width/2+rads4[0];
+       y4 = height/2-rads4[1];
+
+       scs = 0.1; //straight corner size
+
+       x = (center)? 0: width/2;
+       y = (center)? 0: height/2;
+
+       translate([x,y,0])
+       {
+               hull() {
+                       // top left
+                       if(rads1[0] > 0 && rads1[1] > 0)
+                               translate([x1,y1]) mirror([1,0])                ellipsePart(rads1[0]*2,rads1[1]*2,1);
+                       else 
+                               translate([x1,y1])                                              square(size=[scs, scs]);
+                       
+                       // top right
+                       if(rads2[0] > 0 && rads2[1] > 0)
+                               translate([x2,y2])                                              ellipsePart(rads2[0]*2,rads2[1]*2,1);   
+                       else 
+                               translate([width/2-scs,0-height/2])     square(size=[scs, scs]);
+
+                       // bottom right
+                       if(rads3[0] > 0 && rads3[1] > 0)
+                               translate([x3,y3]) mirror([0,1])                ellipsePart(rads3[0]*2,rads3[1]*2,1);
+                       else 
+                               translate([width/2-scs,height/2-scs])   square(size=[scs, scs]);
+                       
+                       // bottom left
+                       if(rads4[0] > 0 && rads4[1] > 0)
+                               translate([x4,y4]) rotate([0,0,-180])   ellipsePart(rads4[0]*2,rads4[1]*2,1);
+                       else 
+                               #translate([x4,height/2-scs])   square(size=[scs, scs]);
+               }
+       }
+}
+module roundedSquare(pos=[10,10],r=2) {
+       minkowski() {
+               square([pos[0]-r*2,pos[1]-r*2],center=true);
+               circle(r=r);
+       }
+}
+// round shapes
+// The orientation might change with the implementation of circle...
+module ngon(sides, radius, center=false){
+    rotate([0, 0, 360/sides/2]) circle(r=radius, $fn=sides, center=center);
+}
+module ellipsePart(width,height,numQuarters)
+{
+    o = 1; //slight overlap to fix a bug
+       difference()
+       {
+               ellipse(width,height);
+               if(numQuarters <= 3)
+                       translate([0-width/2-o,0-height/2-o,0]) square([width/2+o,height/2+o]);
+               if(numQuarters <= 2)
+                       translate([0-width/2-o,-o,0]) square([width/2+o,height/2+o*2]);
+               if(numQuarters < 2)
+                       translate([-o,0,0]) square([width/2+o*2,height/2+o]);
+       }
+}
+module donutSlice(innerSize,outerSize, start_angle, end_angle) 
+{   
+    difference()
+    {
+        pieSlice(outerSize, start_angle, end_angle);
+        if(len(innerSize) > 1) ellipse(innerSize[0]*2,innerSize[1]*2);
+        else circle(innerSize);
+    }
+}
+module pieSlice(size, start_angle, end_angle) //size in radius(es)
+{      
+    rx = ((len(size) > 1)? size[0] : size);
+    ry = ((len(size) > 1)? size[1] : size);
+    trx = rx* sqrt(2) + 1;
+    try = ry* sqrt(2) + 1;
+    a0 = (4 * start_angle + 0 * end_angle) / 4;
+    a1 = (3 * start_angle + 1 * end_angle) / 4;
+    a2 = (2 * start_angle + 2 * end_angle) / 4;
+    a3 = (1 * start_angle + 3 * end_angle) / 4;
+    a4 = (0 * start_angle + 4 * end_angle) / 4;
+    if(end_angle > start_angle)
+        intersection() {
+               if(len(size) > 1)
+               ellipse(rx*2,ry*2);
+               else
+                       circle(rx);
+        polygon([
+            [0,0],
+            [trx * cos(a0), try * sin(a0)],
+            [trx * cos(a1), try * sin(a1)],
+            [trx * cos(a2), try * sin(a2)],
+            [trx * cos(a3), try * sin(a3)],
+            [trx * cos(a4), try * sin(a4)],
+            [0,0]
+       ]);
+    }
+}
+module ellipse(width, height) {
+  scale([1, height/width, 1]) circle(r=width/2);
+}
\ No newline at end of file

diff --git a/scad/MCAD/README.markdown b/scad/MCAD/README.markdown
new file mode 100644 (file)
index 0000000..7cea10b
--- /dev/null
+++ b/scad/MCAD/README.markdown
@@ -0,0 +1,91 @@
+OpenSCAD MCAD Library [![](http://stillmaintained.com/elmom/MCAD.png)](http://stillmaintained.com/elmom/MCAD)
+=====================
+
+This library contains components commonly used in designing and moching up
+mechanical designs. It is currently unfinished and you can expect some API
+changes, however many things are already working.
+
+This library is licensed under the LGPL 2.1
+See http://creativecommons.org/licenses/LGPL/2.1/ or the included file, lgpl-2.1.txt.
+
+## Usage ##
+
+You can import these files in your scripts with `use <MCAD/filename.scad>`, 
+where 'filename' is one of the files listed below like 'motors' or 
+'servos'. Some files include useful constants which will be available 
+with `include <MCAD/filename.scad>`, which should be safe to use on all 
+included files (ie. no top level code should create geometry). (There is 
+a bug/feature that prevents including constants from files that 
+"include" other files - see the openscad mailing list archives for more 
+details. Since the maintainers aren't very responsive, may have to work 
+around this somehow)
+
+If you host your project in git, you can do `git submodule add URL PATH` in your
+repo to import this library as a git submodule for easy usage. Then you need to do
+a `git submodule update --init` after cloning. When you want to update the submodule,
+do `cd PATH; git checkout master; git pull`. See `git help submodule` for more info.
+
+Currently Provided Tools:
+
+* involute_gears.scad (http://www.thingiverse.com/thing:3575):
+    - gear()
+    - bevel_gear()
+    - bevel_gear_pair()
+
+* gears.scad (Old version):
+    - gear(number_of_teeth, circular_pitch OR diametrial_pitch, pressure_angle OPTIONAL, clearance OPTIONAL)
+
+* motors.scad:
+    - stepper_motor_mount(nema_standard, slide_distance OPTIONAL, mochup OPTIONAL)
+
+Other tools (alpha and beta quality):
+
+* nuts_and_bolts.scad: for creating metric and imperial bolt/nut holes
+* bearing.scad: standard/custom bearings
+* screw.scad: screws and augers
+* materials.scad: color definitions for different materials
+* stepper.scad: NEMA standard stepper outlines
+* servos.scad: servo outlines
+* boxes.scad: box with rounded corners
+* triangles.scad: simple triangles
+
+Very generally useful functions and constants:
+
+* math.scad: general math functions
+* constants.scad: mathematical constants
+* curves.scad: mathematical functions defining curves
+* units.scad: easy metric units
+* utilities.scad: geometric funtions and misc. useful stuff
+* teardrop.scad (http://www.thingiverse.com/thing:3457): parametric teardrop module
+* shapes.scad: simple shapes by Catarina Mota
+
+External utils that generate and and process openscad code:
+
+* openscad_testing.py: testing code, see below
+* openscad_utils.py: code for scraping function names etc.
+
+## Development ##
+
+You are welcome to fork this project in github and request pulls. I will try to
+accomodate the community as much as possible in this. If for some reason you
+want collaborator access, just ask.
+
+Github is fun (and easy), but I can include code submissions and other
+improvements directly, and have already included code from various sources
+(thingiverse is great :)
+
+### Code style ###
+I'd prefer to have all included code nicely indented, at least at the block
+level, and no extraneous whitespace. I'm used to indent with four spaces as
+opposed to tabs or other mixes of whitespace, but at least try to choose a style
+and stick to it.
+
+### Testing ###
+I've started a minimal testing infrastucture for OpenSCAD code. It's written in
+python and uses py.test (might be compatible with Nose also). Just type `py.test`
+inside the lib dir in a terminal and you should see a part of the tests passing
+and tracebacks for failing tests. It's very simplistic still, but it should test
+that no syntax errors occur at least.
+
+The code is included in openscad_testing.py, and can be imported to be
+used in other codebases.

diff --git a/scad/MCAD/TODO b/scad/MCAD/TODO
new file mode 100644 (file)
index 0000000..6940f3f
--- /dev/null
+++ b/scad/MCAD/TODO
@@ -0,0 +1,19 @@
+Code that could be integrated:
+* http://github.com/l0b0/qr2scad
+* http://github.com/l0b0/img2scad
+* http://github.com/l0b0/OpenSCAD-Minimizer
+* http://www.thingiverse.com/thing:4656
+* http://www.thingiverse.com/thing:4758
+* http://www.thingiverse.com/thing:6021
+
+Integrate these better:
+* bitmap
+
+Testing:
+* add tests for openscad functions
+* motors.scad
+* tests for 2D stuff
+
+Code style:
+* motors.scad
+* nuts_and_bolts.scad

diff --git a/scad/MCAD/__init__.py b/scad/MCAD/__init__.py
new file mode 100644 (file)
index 0000000..e69de29

diff --git a/scad/MCAD/bearing.scad b/scad/MCAD/bearing.scad
new file mode 100644 (file)
index 0000000..2efea7e
--- /dev/null
+++ b/scad/MCAD/bearing.scad
@@ -0,0 +1,94 @@
+/*
+ * Bearing model.
+ *
+ * Originally by Hans Häggström, 2010.
+ * Dual licenced under Creative Commons Attribution-Share Alike 3.0 and LGPL2 or later
+ */
+
+include <units.scad>
+include <materials.scad>
+
+// Example, uncomment to view
+//test_bearing();
+//test_bearing_hole();
+
+module test_bearing(){
+    bearing();
+    bearing(pos=[5*cm, 0,0], angle=[90,0,0]);
+    bearing(pos=[-2.5*cm, 0,0], model=688);
+}
+
+module test_bearing_hole(){
+    difference(){
+      translate([0, 0, 3.5]) cube(size=[30, 30, 7-10*epsilon], center=true);
+      bearing(outline=true);
+    }
+}
+
+BEARING_INNER_DIAMETER = 0;
+BEARING_OUTER_DIAMETER = 1;
+BEARING_WIDTH = 2;
+
+// Common bearing names
+SkateBearing = 608;
+
+// Bearing dimensions
+// model == XXX ? [inner dia, outer dia, width]:
+function bearingDimensions(model) =
+  model == 608 ? [8*mm, 22*mm, 7*mm]:
+  model == 623 ? [3*mm, 10*mm, 4*mm]:
+  model == 624 ? [4*mm, 13*mm, 5*mm]:
+  model == 627 ? [7*mm, 22*mm, 7*mm]:
+  model == 688 ? [8*mm, 16*mm, 4*mm]:
+  model == 698 ? [8*mm, 19*mm, 6*mm]:
+  [8*mm, 22*mm, 7*mm]; // this is the default
+
+
+function bearingWidth(model) = bearingDimensions(model)[BEARING_WIDTH];
+function bearingInnerDiameter(model) = bearingDimensions(model)[BEARING_INNER_DIAMETER];
+function bearingOuterDiameter(model) = bearingDimensions(model)[BEARING_OUTER_DIAMETER];
+
+module bearing(pos=[0,0,0], angle=[0,0,0], model=SkateBearing, outline=false,
+                material=Steel, sideMaterial=Brass) {
+  // Common bearing names
+  model =
+    model == "Skate" ? 608 :
+    model;
+
+  w = bearingWidth(model);
+  innerD = outline==false ? bearingInnerDiameter(model) : 0;
+  outerD = bearingOuterDiameter(model);
+
+  innerRim = innerD + (outerD - innerD) * 0.2;
+  outerRim = outerD - (outerD - innerD) * 0.2;
+  midSink = w * 0.1;
+
+  translate(pos) rotate(angle) union() {
+    color(material)
+      difference() {
+        // Basic ring
+        Ring([0,0,0], outerD, innerD, w, material, material);
+
+        if (outline==false) {
+          // Side shields
+          Ring([0,0,-epsilon], outerRim, innerRim, epsilon+midSink, sideMaterial, material);
+          Ring([0,0,w-midSink], outerRim, innerRim, epsilon+midSink, sideMaterial, material);
+        }
+      }
+  }
+
+  module Ring(pos, od, id, h, material, holeMaterial) {
+    color(material) {
+      translate(pos)
+        difference() {
+          cylinder(r=od/2, h=h,  $fs = 0.01);
+          color(holeMaterial)
+            translate([0,0,-10*epsilon])
+              cylinder(r=id/2, h=h+20*epsilon,  $fs = 0.01);
+        }
+    }
+  }
+
+}
+
+

diff --git a/scad/MCAD/bitmap/README b/scad/MCAD/bitmap/README
new file mode 100644 (file)
index 0000000..d1d27cc
--- /dev/null
+++ b/scad/MCAD/bitmap/README
@@ -0,0 +1,17 @@
+This is an OpenSCAD module that let's you easily (well kinda) create 3D text. I've emulated the Atari 8-Bit fonts A-Z, a-z, 0-9, and most punctuation. You can create them a letter at a time or pass an array of characters. (OpenSCAD doesn't have any real string manipulation)
+
+It also has a bitmap module that you can use to define your own fonts. It's pretty simple, you pass it an array of numbers, then tell it how many bits per row and it creates cubes (of configurable width and height) in a grid and combines them into a single shape.  The number in the array sets the pixel height modifier.  So if you set height to 5 and the array value is 2, then the height of that pixel will be 10mm.
+
+Be careful when defining your own bitmaps in that you can't have two bits only connected diagonally. Otherwise OpenSCAD will say it's not manifold. For instance you can't have:
+
+0 0 0
+0 1 0
+0 0 1
+
+But you can have:
+
+0 0 0
+0 1 1
+0 0 1
+
+For more info see: http://www.thingiverse.com/thing:2054

diff --git a/scad/MCAD/bitmap/alphabet_block.scad b/scad/MCAD/bitmap/alphabet_block.scad
new file mode 100644 (file)
index 0000000..ff82cba
--- /dev/null
+++ b/scad/MCAD/bitmap/alphabet_block.scad
@@ -0,0 +1,24 @@
+/*
+Parametric Alphabet Block 
+Tony Buser <tbuser@gmail.com>
+http://tonybuser.com
+http://creativecommons.org/licenses/by/3.0/
+*/
+
+use <bitmap.scad>
+
+// change to any letter
+letter = "A";
+
+union() {
+       difference() {
+               cube(size = 20);
+               translate(v = [2, 2, 17]) {
+                       cube(size = [16, 16, 5]);
+               }
+       }
+
+       translate(v = [10, 10, 15]) {
+               8bit_char(letter, 2, 5);
+       }
+}

diff --git a/scad/MCAD/bitmap/bitmap.scad b/scad/MCAD/bitmap/bitmap.scad
new file mode 100644 (file)
index 0000000..3ae5db8
--- /dev/null
+++ b/scad/MCAD/bitmap/bitmap.scad
@@ -0,0 +1,1078 @@
+/*
+Bitmap and 8Bit Font Module
+Tony Buser <tbuser@gmail.com>
+http://tonybuser.com
+http://creativecommons.org/licenses/by/3.0/
+*/
+
+module bitmap(bitmap, block_size, height, row_size) {
+       width = block_size * row_size;
+       bitmap_size = row_size * row_size;
+       
+       function loc_x(loc) = floor(loc / row_size) * block_size;
+       function loc_y(loc) = loc % row_size * block_size;
+       function loc_z(loc) = (bitmap[loc]*height-height)/2;
+
+       translate(v = [-width/2+block_size/2,-width/2+block_size/2,height/2]) {
+               for (loc = [0:bitmap_size - 1]) {
+                       if (bitmap[loc] != 0) {
+                               union() {
+                                       translate(v = [loc_x(loc), loc_y(loc), loc_z(loc)]) {
+                                               cube(size = [block_size, block_size, height * bitmap[loc]], center = true);
+                                       }
+                               }
+                       }
+               }
+       }
+}
+
+module 8bit_char(char, block_size, height, include_base) {
+       if (char == "0") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,1,1,1,0,
+                       0,1,1,1,1,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "1") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,1,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "2") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,0,0,1,1,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,1,1,0,0,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "3") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,0,0,0,1,1,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,0,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "4") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,1,1,0,0,
+                       0,0,0,1,1,1,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,1,1,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,0,0,0,1,1,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "5") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,1,1,1,0,0,
+                       0,0,0,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "6") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "7") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,0,0,0,0,1,1,0,
+                       0,0,0,0,1,1,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,1,1,0,0,0,0,
+                       0,0,1,1,0,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "8") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "9") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,1,0,
+                       0,0,0,0,0,1,1,0,
+                       0,0,0,0,1,1,0,0,
+                       0,0,1,1,1,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "A") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,1,1,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "B") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,1,1,1,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "C") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "D") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,1,1,0,0,0,
+                       0,1,1,0,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,1,1,0,0,
+                       0,1,1,1,1,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "E") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,1,1,1,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "F") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,1,1,1,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "G") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,1,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,0,1,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "H") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,1,1,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "I") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "J") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,1,1,1,0,
+                       0,0,0,0,0,1,1,0,
+                       0,0,0,0,0,1,1,0,
+                       0,0,0,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "K") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,1,1,0,0,
+                       0,1,1,1,1,0,0,0,
+                       0,1,1,1,1,0,0,0,
+                       0,1,1,0,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "L") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "M") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,0,1,1,
+                       0,1,1,1,0,1,1,1,
+                       0,1,1,1,1,1,1,1,
+                       0,1,1,0,1,0,1,1,
+                       0,1,1,0,0,0,1,1,
+                       0,1,1,0,0,0,1,1,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "N") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,1,0,1,1,0,
+                       0,1,1,1,1,1,1,0,
+                       0,1,1,1,1,1,1,0,
+                       0,1,1,0,1,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "O") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "P") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,1,1,1,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "Q") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,1,1,1,0,0,
+                       0,0,1,1,0,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "R") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,1,1,1,0,0,
+                       0,1,1,0,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "S") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,0,0,1,1,0,
+                       0,0,0,0,0,1,1,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "T") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "U") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,1,1,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "V") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "W") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,0,1,1,
+                       0,1,1,0,0,0,1,1,
+                       0,1,1,0,1,0,1,1,
+                       0,1,1,1,1,1,1,1,
+                       0,1,1,1,0,1,1,1,
+                       0,1,1,0,0,0,1,1,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "X") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "Y") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "Z") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,0,0,0,1,1,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,1,1,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "OE") {
+               bitmap([
+                       0,0,1,0,0,1,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,0,0
+               ], block_size, height, 8);
+       } else if (char == "a") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,0,0,1,1,0,
+                       0,0,1,1,1,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "b") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,1,1,1,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "c") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "d") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,1,1,0,
+                       0,0,0,0,0,1,1,0,
+                       0,0,1,1,1,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "e") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,1,1,1,1,0,
+                       0,1,1,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "f") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,1,1,1,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,1,1,1,1,1,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "g") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,1,0,
+                       0,0,0,0,0,1,1,0,
+                       0,1,1,1,1,1,0,0
+               ], block_size, height, 8);
+       } else if (char == "h") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "i") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "j") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,1,1,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,1,1,0,
+                       0,0,0,0,0,1,1,0,
+                       0,0,0,0,0,1,1,0,
+                       0,0,0,0,0,1,1,0,
+                       0,0,1,1,1,1,0,0
+               ], block_size, height, 8);
+       } else if (char == "k") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,0,1,1,0,0,
+                       0,1,1,1,1,0,0,0,
+                       0,1,1,0,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "l") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "m") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,1,1,1,1,1,
+                       0,1,1,1,1,1,1,1,
+                       0,1,1,0,1,0,1,1,
+                       0,1,1,0,0,0,1,1,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "n") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "o") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "p") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,1,1,1,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "q") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,1,0,
+                       0,0,0,0,0,1,1,0,
+                       0,0,0,0,0,1,1,0
+               ], block_size, height, 8);
+       } else if (char == "r") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "s") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,1,0,
+                       0,1,1,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,0,0,1,1,0,
+                       0,1,1,1,1,1,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "t") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,0,1,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "u") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "v") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "w") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,0,1,1,
+                       0,1,1,0,1,0,1,1,
+                       0,1,1,1,1,1,1,1,
+                       0,0,1,1,1,1,1,0,
+                       0,0,1,1,0,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "x") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "y") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,1,0,
+                       0,0,0,0,1,1,0,0,
+                       0,1,1,1,1,0,0,0
+               ], block_size, height, 8);
+       } else if (char == "z") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,0,0,0,1,1,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,1,1,0,0,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == "+") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,1,1,1,1,1,1,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == "-") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,1,1,1,1,1,1,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == ":") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == ".") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == ",") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,1,1,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == "?") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,0,0,1,1,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == "=") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,1,1,1,1,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == "*") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,1,1,1,1,0,0,
+                       1,1,1,1,1,1,1,1,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == "!") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == "''") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == "#") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,1,1,0,
+                       1,1,1,1,1,1,1,1,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,0,1,1,0,
+                       1,1,1,1,1,1,1,1,
+                       0,1,1,0,0,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == "$") {
+               bitmap([
+                       0,0,0,1,1,0,0,0,
+                       0,0,1,1,1,1,1,0,
+                       0,1,1,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,0,0,1,1,0,
+                       0,1,1,1,1,1,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == "%") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,1,1,0,0,
+                       0,0,1,1,1,0,0,0,
+                       0,0,1,1,0,0,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,0,0,0,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == "&") {
+               bitmap([
+                       0,0,0,1,1,1,0,0,
+                       0,0,1,1,0,1,1,0,
+                       0,0,0,1,1,1,0,0,
+                       0,0,1,1,1,0,0,0,
+                       0,1,1,0,1,1,1,1,
+                       0,1,1,0,1,1,1,0,
+                       0,0,1,1,1,0,1,1,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == "@") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,1,1,0,0,1,1,0,
+                       0,1,1,0,1,1,1,0,
+                       0,1,1,0,1,1,1,0,
+                       0,1,1,0,0,0,0,0,
+                       0,0,1,1,1,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == "'") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == "(") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,1,1,1,0,0,
+                       0,0,1,1,1,0,0,0,
+                       0,0,1,1,0,0,0,0,
+                       0,0,1,1,0,0,0,0,
+                       0,0,1,1,1,0,0,0,
+                       0,0,0,1,1,1,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == ")") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,0,0,0,
+                       0,0,0,1,1,1,0,0,
+                       0,0,0,0,1,1,0,0,
+                       0,0,0,0,1,1,0,0,
+                       0,0,0,1,1,1,0,0,
+                       0,0,1,1,1,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == "<") {
+               bitmap([
+                       0,0,0,0,0,1,1,0,
+                       0,0,0,0,1,1,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,1,1,0,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,0,1,1,0,0,
+                       0,0,0,0,0,1,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == ">") {
+               bitmap([
+                       0,1,1,0,0,0,0,0,
+                       0,0,1,1,0,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,0,1,1,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,1,1,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == "[") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,1,1,0,0,0,0,
+                       0,0,1,1,0,0,0,0,
+                       0,0,1,1,0,0,0,0,
+                       0,0,1,1,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == "]") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,0,1,1,0,0,
+                       0,0,0,0,1,1,0,0,
+                       0,0,0,0,1,1,0,0,
+                       0,0,0,0,1,1,0,0,
+                       0,0,1,1,1,1,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == "/") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,1,1,0,
+                       0,0,0,0,1,1,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,1,1,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,1,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == "\\") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,1,1,0,0,0,0,0,
+                       0,0,1,1,0,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,0,1,1,0,0,
+                       0,0,0,0,0,1,1,0,
+                       0,0,0,0,0,0,1,0,
+                       0,0,0,0,0,0,0,0
+               ], block_size, height, 8);
+       } else  if (char == "_") {
+               bitmap([
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       0,0,0,0,0,0,0,0,
+                       1,1,1,1,1,1,1,1
+               ], block_size, height, 8);
+       } else  if (char == "|") {
+               bitmap([
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0,
+                       0,0,0,1,1,0,0,0
+               ], block_size, height, 8);
+       } else {
+               echo("Invalid Character: ", char);
+       }
+
+}
+
+module 8bit_str(chars, char_count, block_size, height) {
+       echo(str("Total Width: ", block_size * 8 * char_count, "mm"));
+       union() {
+               for (count = [0:char_count-1]) {
+                       translate(v = [0, count * block_size * 8, 0]) {
+                               8bit_char(chars[count], block_size, height);
+                       }
+               }
+       }
+}
+
+/*
+<bitmap.scad>
+
+block_size = 5;
+height = 10;
+
+union() {
+       translate(v = [0,0,5]) {
+               8bit_char("A", block_size, height);
+
+               //bitmap([
+               //      1,1,1,1,1,1,1,1,
+               //      1,0,0,1,1,0,0,1,
+               //      1,0,1,1,1,1,0,1,
+               //      1,1,1,0,0,1,1,1,
+               //      1,1,1,0,0,1,1,1,
+               //      1,0,1,1,1,1,0,1,
+               //      1,0,0,1,1,0,0,1,
+               //      1,1,1,1,1,1,1,1
+               //], block_size, height, 8);
+
+               //bitmap([
+               //      1,1,1,1, 
+               //      1,0,0,1, 
+               //      1,0,0,1, 
+               //      1,1,1,1 
+               //], block_size, height, 4);
+       }
+       translate(v = [0,0,5/2]) {
+               color([0,0,1,1]) {
+                       cube(size = [block_size * 8, block_size * 8, 5], center = true);
+               }
+       }
+}
+
+<bitmap.scad>
+
+chars = ["T","O","N","Y","","B","U","S","E","R"];
+char_count = 10;
+block_size = 1;
+height = 5;
+
+union() {
+       translate(v = [0,-block_size*8*char_count/2+block_size*8/2,5]) {
+               8bit_str(chars, char_count, block_size, height);
+       }
+       translate(v = [0,0,5/2]) {
+               color([0,0,1,1]) {
+                       cube(size = [block_size * 8, block_size * 8 * char_count, 5], center = true);
+               }
+       }
+}
+*/

diff --git a/scad/MCAD/bitmap/height_map.scad b/scad/MCAD/bitmap/height_map.scad
new file mode 100644 (file)
index 0000000..0b75f56
--- /dev/null
+++ b/scad/MCAD/bitmap/height_map.scad
@@ -0,0 +1,31 @@
+/*
+Height Map Example
+Tony Buser <tbuser@gmail.com>
+http://tonybuser.com
+http://creativecommons.org/licenses/by/3.0/
+
+Can also dynamically run this by passing an array on the command line:
+
+/Applications/OpenSCAD.app/Contents/MacOS/OpenSCAD -m make -D bitmap=[2,2,2,0,1,3,2,2,2] -D row_size=3 -s height_map.stl height_map.scad
+*/
+
+use <bitmap.scad>
+
+block_size = 5;
+height = 5;
+
+row_size = 10; // 10x10 pixels
+bitmap = [
+       1,1,0,0,1,1,0,0,1,1,
+       1,1,1,1,1,1,1,1,1,1,
+       0,1,2,2,1,1,2,2,1,0,
+       0,1,2,1,1,1,1,2,1,0,
+       1,1,1,1,3,3,1,1,1,1,
+       1,1,1,1,3,3,1,1,1,1,
+       0,1,2,1,1,1,1,2,1,0,
+       0,1,2,2,1,1,2,2,1,0,
+       1,1,1,1,1,1,1,1,1,1,
+       1,1,0,0,1,1,0,0,1,1
+];
+
+bitmap(bitmap, block_size, height, row_size);

diff --git a/scad/MCAD/bitmap/letter_necklace.scad b/scad/MCAD/bitmap/letter_necklace.scad
new file mode 100644 (file)
index 0000000..8d35781
--- /dev/null
+++ b/scad/MCAD/bitmap/letter_necklace.scad
@@ -0,0 +1,59 @@
+/*
+Parametric letters for for a necklace
+Elmo Mäntynen <elmo.mantynen@iki.fi>
+LGPL 2.1
+*/
+
+use <bitmap.scad>
+
+// change chars array and char_count
+// OpenSCAD has no string or length methods :(
+chars = ["M","a","k","e","r","B","o","t"];
+char_count = 8;
+
+// block size 1 will result in 8mm per letter
+block_size = 2;
+// height is the Z height of each letter
+height = 3;
+
+//Hole for the necklace
+hole_diameter = 5;
+
+module 8bit_str(chars, char_count, block_size, height) {
+       echo(str("Total Width: ", block_size * 8 * char_count, "mm"));
+       union() {
+               for (count = [0:char_count-1]) {
+                       translate(v = [0, count * block_size * 8, 0]) {
+                               8bit_char(chars[count], block_size, height);
+                       }
+               }
+       }
+}
+
+module letter(char, block_size, height, hole_diameter) {
+       union() {
+               translate(v = [0,0, hole_diameter*1.3]) {
+                       8bit_char(char, block_size, height);
+               }
+               translate(v = [0,0,(hole_diameter*1.3)/2]) {
+                       color([0,0,1,1]) {
+                               difference() {
+                                       cube(size = [block_size * 8, block_size * 8, hole_diameter+2], center = true);
+                                       rotate([90, 0, 0]) cylinder(h = block_size * 8 + 1, r = hole_diameter/2, center = true);
+                               }
+                       }
+               }
+       }
+}
+
+matrix = [["O",  "L", "E", "N", "S"], 
+               [ "Y", "OE", "N", "Y", "T"]];
+
+union() {
+       for (column = [0:1]) {
+               for (row = [0:4]) {
+                       translate(v=[column*(block_size*1.1)*8, row*(block_size*1.1)*8, 0])
+                               letter(matrix[column][row], block_size, height, hole_diameter);
+               }
+       }       
+}

diff --git a/scad/MCAD/bitmap/name_tag.scad b/scad/MCAD/bitmap/name_tag.scad
new file mode 100644 (file)
index 0000000..7687c54
--- /dev/null
+++ b/scad/MCAD/bitmap/name_tag.scad
@@ -0,0 +1,39 @@
+/*
+Parametric Name Tag 
+Tony Buser <tbuser@gmail.com>
+http://tonybuser.com
+http://creativecommons.org/licenses/by/3.0/
+*/
+
+use <bitmap.scad>
+
+// change chars array and char_count
+// OpenSCAD has no string or length methods :(
+chars = ["R", "E", "P", "R", "A", "P"];
+char_count = 6;
+
+
+// block size 1 will result in 8mm per letter
+block_size = 2;
+// height is the Z height of each letter
+height = 3;
+// Append a hole fo a keyring, necklace etc. ?
+key_ring_hole = true;
+
+union() {
+       translate(v = [0,-block_size*8*char_count/2+block_size*8/2,3]) {
+               8bit_str(chars, char_count, block_size, height);
+       }
+       translate(v = [0,0,3/2]) {
+               color([0,0,1,1]) {
+                       cube(size = [block_size * 8, block_size * 8 * char_count, 3], center = true);
+               }
+       }
+       if (key_ring_hole == true){
+               translate([0, block_size * 8 * (char_count+1)/2, 3/2])  
+               difference(){
+                       cube(size = [block_size * 8, block_size * 8 , 3], center = true);
+                       cube(size = [block_size * 4, block_size * 4 , 5], center = true);
+               }
+       }
+}

diff --git a/scad/MCAD/boxes.scad b/scad/MCAD/boxes.scad
new file mode 100644 (file)
index 0000000..d9cb1ee
--- /dev/null
+++ b/scad/MCAD/boxes.scad
@@ -0,0 +1,43 @@
+// Library: boxes.scad
+// Version: 1.0
+// Author: Marius Kintel
+// Copyright: 2010
+// License: BSD
+
+// roundedBox([width, height, depth], float radius, bool sidesonly);
+
+// EXAMPLE USAGE:
+// roundedBox([20, 30, 40], 5, true);
+
+// size is a vector [w, h, d]
+module roundedBox(size, radius, sidesonly)
+{
+  rot = [ [0,0,0], [90,0,90], [90,90,0] ];
+  if (sidesonly) {
+    cube(size - [2*radius,0,0], true);
+    cube(size - [0,2*radius,0], true);
+    for (x = [radius-size[0]/2, -radius+size[0]/2],
+           y = [radius-size[1]/2, -radius+size[1]/2]) {
+      translate([x,y,0]) cylinder(r=radius, h=size[2], center=true);
+    }
+  }
+  else {
+    cube([size[0], size[1]-radius*2, size[2]-radius*2], center=true);
+    cube([size[0]-radius*2, size[1], size[2]-radius*2], center=true);
+    cube([size[0]-radius*2, size[1]-radius*2, size[2]], center=true);
+
+    for (axis = [0:2]) {
+      for (x = [radius-size[axis]/2, -radius+size[axis]/2],
+             y = [radius-size[(axis+1)%3]/2, -radius+size[(axis+1)%3]/2]) {
+        rotate(rot[axis])
+          translate([x,y,0])
+          cylinder(h=size[(axis+2)%3]-2*radius, r=radius, center=true);
+      }
+    }
+    for (x = [radius-size[0]/2, -radius+size[0]/2],
+           y = [radius-size[1]/2, -radius+size[1]/2],
+           z = [radius-size[2]/2, -radius+size[2]/2]) {
+      translate([x,y,z]) sphere(radius);
+    }
+  }
+}

diff --git a/scad/MCAD/constants.scad b/scad/MCAD/constants.scad
new file mode 100644 (file)
index 0000000..141c0c3
--- /dev/null
+++ b/scad/MCAD/constants.scad
@@ -0,0 +1,9 @@
+// MIT license
+
+
+TAU = 6.2831853071; //2*PI, see http://tauday.com/
+PI = TAU/2;
+
+// translates a imperial measurement in inches to meters
+mm_per_inch = 25.4;
+

diff --git a/scad/MCAD/curves.scad b/scad/MCAD/curves.scad
new file mode 100644 (file)
index 0000000..5ababc1
--- /dev/null
+++ b/scad/MCAD/curves.scad
@@ -0,0 +1,21 @@
+// Parametric curves, to be used as paths
+// Licensed under the MIT license.
+// © 2010 by Elmo Mäntynen
+use <math.scad>
+include <constants.scad>
+
+
+
+/* A circular helix of radius a and pitch 2πb is described by the following parametrisation:
+x(t) = a*cos(t),
+y(t) = a*sin(t),
+z(t) = b*t
+*/
+
+
+function b(pitch) = pitch/(TAU);
+function t(pitch, z) = z/b(pitch);
+
+function helix_curve(pitch, radius, z) =
+    [radius*cos(deg(t(pitch, z))), radius*sin(deg(t(pitch, z))), z];
+

diff --git a/scad/MCAD/gears.scad b/scad/MCAD/gears.scad
new file mode 100644 (file)
index 0000000..2bc5e02
--- /dev/null
+++ b/scad/MCAD/gears.scad
@@ -0,0 +1,177 @@
+// Copyright 2010 D1plo1d
+// LGPL 2.1
+
+
+//test_involute_curve();
+//test_gears();
+//demo_3d_gears();
+
+// Geometry Sources:
+//     http://www.cartertools.com/involute.html
+//     gears.py (inkscape extension: /usr/share/inkscape/extensions/gears.py)
+// Usage:
+//     Diametral pitch: Number of teeth per unit length.
+//     Circular pitch: Length of the arc from one tooth to the next
+//     Clearance: Radial distance between top of tooth on one gear to bottom of gap on another.
+
+module gear(number_of_teeth,
+               circular_pitch=false, diametral_pitch=false,
+               pressure_angle=20, clearance = 0)
+{
+       if (circular_pitch==false && diametral_pitch==false) echo("MCAD ERROR: gear module needs either a diametral_pitch or circular_pitch");
+
+       //Convert diametrial pitch to our native circular pitch
+       circular_pitch = (circular_pitch!=false?circular_pitch:180/diametral_pitch);
+
+       // Pitch diameter: Diameter of pitch circle.
+       pitch_diameter  =  number_of_teeth * circular_pitch / 180;
+       pitch_radius = pitch_diameter/2;
+
+       // Base Circle
+       base_diameter = pitch_diameter*cos(pressure_angle);
+       base_radius = base_diameter/2;
+
+       // Diametrial pitch: Number of teeth per unit length.
+       pitch_diametrial = number_of_teeth / pitch_diameter;
+
+       // Addendum: Radial distance from pitch circle to outside circle.
+       addendum = 1/pitch_diametrial;
+
+       //Outer Circle
+       outer_radius = pitch_radius+addendum;
+       outer_diameter = outer_radius*2;
+
+       // Dedendum: Radial distance from pitch circle to root diameter
+       dedendum = addendum + clearance;
+
+       // Root diameter: Diameter of bottom of tooth spaces.
+       root_radius = pitch_radius-dedendum;
+       root_diameter = root_radius * 2;
+
+       half_thick_angle = 360 / (4 * number_of_teeth);
+
+       union()
+       {
+               rotate(half_thick_angle) circle($fn=number_of_teeth*2, r=root_radius*1.001);
+
+               for (i= [1:number_of_teeth])
+               //for (i = [0])
+               {
+                       rotate([0,0,i*360/number_of_teeth])
+                       {
+                               involute_gear_tooth(
+                                       pitch_radius = pitch_radius,
+                                       root_radius = root_radius,
+                                       base_radius = base_radius,
+                                       outer_radius = outer_radius,
+                                       half_thick_angle = half_thick_angle);
+                       }
+               }
+       }
+}
+
+
+module involute_gear_tooth(
+                                       pitch_radius,
+                                       root_radius,
+                                       base_radius,
+                                       outer_radius,
+                                       half_thick_angle
+                                       )
+{
+       pitch_to_base_angle  = involute_intersect_angle( base_radius, pitch_radius );
+
+       outer_to_base_angle = involute_intersect_angle( base_radius, outer_radius );
+
+       base1 = 0 - pitch_to_base_angle - half_thick_angle;
+       pitch1 = 0 - half_thick_angle;
+       outer1 = outer_to_base_angle - pitch_to_base_angle - half_thick_angle;
+
+       b1 = polar_to_cartesian([ base1, base_radius ]);
+       p1 = polar_to_cartesian([ pitch1, pitch_radius ]);
+       o1 = polar_to_cartesian([ outer1, outer_radius ]);
+
+       b2 = polar_to_cartesian([ -base1, base_radius ]);
+       p2 = polar_to_cartesian([ -pitch1, pitch_radius ]);
+       o2 = polar_to_cartesian([ -outer1, outer_radius ]);
+
+       // ( root_radius > base_radius variables )
+               pitch_to_root_angle = pitch_to_base_angle - involute_intersect_angle(base_radius, root_radius );
+               root1 = pitch1 - pitch_to_root_angle;
+               root2 = -pitch1 + pitch_to_root_angle;
+               r1_t =  polar_to_cartesian([ root1, root_radius ]);
+               r2_t =  polar_to_cartesian([ -root1, root_radius ]);
+
+       // ( else )
+               r1_f =  polar_to_cartesian([ base1, root_radius ]);
+               r2_f =  polar_to_cartesian([ -base1, root_radius ]);
+
+       if (root_radius > base_radius)
+       {
+               //echo("true");
+               polygon( points = [
+                       r1_t,p1,o1,o2,p2,r2_t
+               ], convexity = 3);
+       }
+       else
+       {
+               polygon( points = [
+                       r1_f, b1,p1,o1,o2,p2,b2,r2_f
+               ], convexity = 3);
+       }
+
+}
+
+// Mathematical Functions
+//===============
+
+// Finds the angle of the involute about the base radius at the given distance (radius) from it's center.
+//source: http://www.mathhelpforum.com/math-help/geometry/136011-circle-involute-solving-y-any-given-x.html
+
+function involute_intersect_angle(base_radius, radius) = sqrt( pow(radius/base_radius,2) - 1);
+
+
+
+// Polar coord [angle, radius] to cartesian coord [x,y]
+
+function polar_to_cartesian(polar) = [
+       polar[1]*cos(polar[0]),
+       polar[1]*sin(polar[0])
+];
+
+
+// Test Cases
+//===============
+
+module test_gears()
+{
+       gear(number_of_teeth=51,circular_pitch=200);
+       translate([0, 50])gear(number_of_teeth=17,circular_pitch=200);
+       translate([-50,0]) gear(number_of_teeth=17,diametral_pitch=1);
+}
+
+module demo_3d_gears()
+{
+       //double helical gear
+       // (helics don't line up perfectly - for display purposes only ;)
+       translate([50,0])
+       {
+       linear_extrude(height = 10, center = true, convexity = 10, twist = -45)
+        gear(number_of_teeth=17,diametral_pitch=1);
+       translate([0,0,10]) linear_extrude(height = 10, center = true, convexity = 10, twist = 45)
+        gear(number_of_teeth=17,diametral_pitch=1);
+       }
+
+       //spur gear
+       translate([0,-50]) linear_extrude(height = 10, center = true, convexity = 10, twist = 0)
+        gear(number_of_teeth=17,diametral_pitch=1);
+
+}
+
+module test_involute_curve()
+{
+       for (i=[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15])
+       {
+               translate(polar_to_cartesian([involute_intersect_angle( 0.1,i) , i ])) circle($fn=15, r=0.5);
+       }
+}

diff --git a/scad/MCAD/gridbeam.scad b/scad/MCAD/gridbeam.scad
new file mode 100644 (file)
index 0000000..8818611
--- /dev/null
+++ b/scad/MCAD/gridbeam.scad
@@ -0,0 +1,105 @@
+/*
+ *  OpenSCAD GridBeam Library (www.openscad.org)
+ *  Copyright (C) 2009 Timothy Schmidt
+ *
+ *  License: LGPL 2.1 or later
+*/
+
+// zBeam(segments) - create a vertical gridbeam strut 'segments' long
+// xBeam(segments) - create a horizontal gridbeam strut along the X axis
+// yBeam(segments) - create a horizontal gridbeam strut along the Y axis
+// topShelf(width, depth, corners) - create a shelf suitable for use in gridbeam structures width and depth in 'segments', corners == 1 notches corners
+// bottomShelf(width, depth, corners) - like topShelf, but aligns shelf to underside of beams
+// backBoard(width, height, corners) - create a backing board suitable for use in gridbeam structures width and height in 'segments', corners == 1 notches corners
+// frontBoard(width, height, corners) - like backBoard, but aligns board to front side of beams
+// translateBeam([x, y, z]) - translate gridbeam struts or shelves in X, Y, or Z axes in units 'segments'
+
+include <units.scad>
+
+$beam_width = inch * 1.5;
+$beam_hole_radius = inch * 5/16;
+$beam_is_hollow = 1;
+$beam_wall_thickness = inch * 1/8;
+$beam_shelf_thickness = inch * 1/4;
+
+module zBeam(segments) {
+       difference() {
+               cube([$beam_width, $beam_width, $beam_width * segments]);
+               for(i = [0 : segments - 1]) {
+                       translate([$beam_width / 2, $beam_width + 1, $beam_width * i + $beam_width / 2])
+                       rotate([90,0,0])
+                       cylinder(r=$beam_hole_radius, h=$beam_width + 2);
+
+                       translate([-1, $beam_width / 2, $beam_width * i + $beam_width / 2])
+                       rotate([0,90,0])
+                       cylinder(r=$beam_hole_radius, h=$beam_width + 2);
+               }
+       if ($beam_is_hollow == 1) {
+               translate([$beam_wall_thickness, $beam_wall_thickness, -1])
+               cube([$beam_width - $beam_wall_thickness * 2, $beam_width - $beam_wall_thickness * 2, $beam_width * segments + 2]);
+       }
+       }
+}
+
+module xBeam(segments) {
+       translate([0,0,$beam_width])
+       rotate([0,90,0])
+       zBeam(segments);
+}
+
+module yBeam(segments) {
+       translate([0,0,$beam_width])
+       rotate([-90,0,0])
+       zBeam(segments);
+}
+
+module translateBeam(v) {
+       for (i = [0 : $children - 1]) {
+               translate(v * $beam_width) child(i);
+       }
+}
+
+module topShelf(width, depth, corners) {
+       difference() {
+               cube([width * $beam_width, depth * $beam_width, $beam_shelf_thickness]);
+
+               if (corners == 1) {
+               translate([-1,  -1,  -1])
+               cube([$beam_width + 2, $beam_width + 2, $beam_shelf_thickness + 2]);
+               translate([-1, (depth - 1) * $beam_width, -1])
+               cube([$beam_width + 2, $beam_width + 2, $beam_shelf_thickness + 2]);
+               translate([(width - 1) * $beam_width, -1, -1])
+               cube([$beam_width + 2, $beam_width + 2, $beam_shelf_thickness + 2]);
+               translate([(width - 1) * $beam_width, (depth - 1) * $beam_width, -1])
+               cube([$beam_width + 2, $beam_width + 2, $beam_shelf_thickness + 2]);
+               }
+       }
+}
+
+module bottomShelf(width, depth, corners) {
+       translate([0,0,-$beam_shelf_thickness])
+       topShelf(width, depth, corners);
+}
+
+module  backBoard(width, height, corners) {
+       translate([$beam_width, 0, 0])
+       difference() {
+               cube([$beam_shelf_thickness, width * $beam_width, height * $beam_width]);
+
+               if (corners == 1) {
+               translate([-1,  -1,  -1])
+               cube([$beam_shelf_thickness + 2, $beam_width + 2, $beam_width + 2]);
+               translate([-1, -1, (height - 1) * $beam_width])
+               cube([$beam_shelf_thickness + 2, $beam_width + 2, $beam_width + 2]);
+               translate([-1, (width - 1) * $beam_width, -1])
+               cube([$beam_shelf_thickness + 2, $beam_width + 2, $beam_width + 2]);
+               translate([-1, (width - 1) * $beam_width, (height - 1) * $beam_width])
+               cube([$beam_shelf_thickness + 2, $beam_width + 2, $beam_width + 2]);
+               }
+       }
+}
+
+module frontBoard(width, height, corners) {
+       translate([-$beam_width - $beam_shelf_thickness, 0, 0])
+       backBoard(width, height, corners);
+}
\ No newline at end of file

diff --git a/scad/MCAD/hardware.scad b/scad/MCAD/hardware.scad
new file mode 100644 (file)
index 0000000..025430d
--- /dev/null
+++ b/scad/MCAD/hardware.scad
@@ -0,0 +1,122 @@
+// License: LGPL 2.1
+
+rodsize = 6;   //threaded/smooth rod diameter in mm
+xaxis = 182.5; //width of base in mm
+yaxis = 266.5; //length of base in mm
+
+
+screwsize = 3; //bearing bore/screw diameter in mm
+bearingsize = 10;      //outer diameter of bearings in mm
+bearingwidth = 4;      //width of bearings in mm
+
+
+rodpitch = rodsize / 6;
+rodnutsize = 0.8 * rodsize;
+rodnutdiameter = 1.9 * rodsize;
+rodwashersize = 0.2 * rodsize;
+rodwasherdiameter = 2 * rodsize;
+screwpitch = screwsize / 6;
+nutsize = 0.8 * screwsize;
+nutdiameter = 1.9 * screwsize;
+washersize = 0.2 * screwsize;
+washerdiameter = 2 * screwsize;
+partthick = 2 * rodsize;
+vertexrodspace = 2 * rodsize;
+
+
+c = [0.3, 0.3, 0.3];
+rodendoffset = rodnutsize + rodwashersize * 2 + partthick / 2;
+vertexoffset = vertexrodspace + rodendoffset;
+
+
+renderrodthreads = false;
+renderscrewthreads = false;
+fn = 36;
+
+
+
+module rod(length, threaded) if (threaded && renderrodthreads) {
+       linear_extrude(height = length, center = true, convexity = 10, twist = -360 * length / rodpitch, $fn = fn)
+               translate([rodsize * 0.1 / 2, 0, 0])
+                       circle(r = rodsize * 0.9 / 2, $fn = fn);
+} else cylinder(h = length, r = rodsize / 2, center = true, $fn = fn);
+
+
+module screw(length, nutpos, washer, bearingpos = -1) union(){
+       translate([0, 0, -length / 2]) if (renderscrewthreads) {
+               linear_extrude(height = length, center = true, convexity = 10, twist = -360 * length / screwpitch, $fn = fn)
+                       translate([screwsize * 0.1 / 2, 0, 0])
+                               circle(r = screwsize * 0.9 / 2, $fn = fn);
+       } else cylinder(h = length, r = screwsize / 2, center = true, $fn = fn);
+       render() difference() {
+               translate([0, 0, screwsize / 2]) cylinder(h = screwsize, r = screwsize, center = true, $fn = fn);
+               translate([0, 0, screwsize]) cylinder(h = screwsize, r = screwsize / 2, center = true, $fn = 6);
+       }
+       if (washer > 0 && nutpos > 0) {
+               washer(nutpos);
+               nut(nutpos + washersize);
+       } else if (nutpos > 0) nut(nutpos);
+       if (bearingpos >= 0) bearing(bearingpos);
+}
+
+
+module bearing(position) render() translate([0, 0, -position - bearingwidth / 2]) union() {
+       difference() {
+               cylinder(h = bearingwidth, r = bearingsize / 2, center = true, $fn = fn);
+               cylinder(h = bearingwidth * 2, r = bearingsize / 2 - 1, center = true, $fn = fn);
+       }
+       difference() {
+               cylinder(h = bearingwidth - 0.5, r = bearingsize / 2 - 0.5, center = true, $fn = fn);
+               cylinder(h = bearingwidth * 2, r = screwsize / 2 + 0.5, center = true, $fn = fn);
+       }
+       difference() {
+               cylinder(h = bearingwidth, r = screwsize / 2 + 1, center = true, $fn = fn);
+               cylinder(h = bearingwidth + 0.1, r = screwsize / 2, center = true, $fn = fn);
+       }
+}
+
+
+module nut(position, washer) render() translate([0, 0, -position - nutsize / 2]) {
+       intersection() {
+               scale([1, 1, 0.5]) sphere(r = 1.05 * screwsize, center = true);
+               difference() {
+                       cylinder (h = nutsize, r = nutdiameter / 2, center = true, $fn = 6);
+                       cylinder(r = screwsize / 2, h = nutsize + 0.1, center = true, $fn = fn);
+               }
+       }
+       if (washer > 0) washer(0);
+}
+
+
+module washer(position) render() translate ([0, 0, -position - washersize / 2]) difference() {
+       cylinder(r = washerdiameter / 2, h = washersize, center = true, $fn = fn);
+       cylinder(r = screwsize / 2, h = washersize + 0.1, center = true, $fn = fn);
+}
+
+module rodnut(position, washer) render() translate([0, 0, position]) {
+       intersection() {
+               scale([1, 1, 0.5]) sphere(r = 1.05 * rodsize, center = true);
+               difference() {
+                       cylinder (h = rodnutsize, r = rodnutdiameter / 2, center = true, $fn = 6);
+                       rod(rodnutsize + 0.1);
+               }
+       }
+       if (washer == 1 || washer == 4) rodwasher(((position > 0) ? -1 : 1) * (rodnutsize + rodwashersize) / 2);
+       if (washer == 2 || washer == 4) rodwasher(((position > 0) ? 1 : -1) * (rodnutsize + rodwashersize) / 2);
+}
+
+
+module rodwasher(position) render() translate ([0, 0, position]) difference() {
+       cylinder(r = rodwasherdiameter / 2, h = rodwashersize, center = true, $fn = fn);
+       rod(rodwashersize + 0.1);
+}
+
+
+rod(20);
+translate([rodsize * 2.5, 0, 0]) rod(20, true);
+translate([rodsize * 5, 0, 0]) screw(10, true);
+translate([rodsize * 7.5, 0, 0]) bearing();
+translate([rodsize * 10, 0, 0]) rodnut();
+translate([rodsize * 12.5, 0, 0]) rodwasher();
+translate([rodsize * 15, 0, 0]) nut();
+translate([rodsize * 17.5, 0, 0]) washer();
\ No newline at end of file

diff --git a/scad/MCAD/involute_gears.scad b/scad/MCAD/involute_gears.scad
new file mode 100644 (file)
index 0000000..eaf9051
--- /dev/null
+++ b/scad/MCAD/involute_gears.scad
@@ -0,0 +1,698 @@
+// Parametric Involute Bevel and Spur Gears by GregFrost
+// It is licensed under the Creative Commons - GNU LGPL 2.1 license.
+// © 2010 by GregFrost, thingiverse.com/Amp
+// http://www.thingiverse.com/thing:3575 and http://www.thingiverse.com/thing:3752
+
+// Simple Test:
+//gear (circular_pitch=700,
+//     gear_thickness = 12,
+//     rim_thickness = 15,
+//     hub_thickness = 17,
+//     circles=8);
+
+//Complex Spur Gear Test:
+//test_gears ();
+
+// Meshing Double Helix:
+//test_meshing_double_helix ();
+
+module test_meshing_double_helix(){
+    meshing_double_helix ();
+}
+
+// Demonstrate the backlash option for Spur gears.
+//test_backlash ();
+
+// Demonstrate how to make meshing bevel gears.
+//test_bevel_gear_pair();
+
+module test_bevel_gear_pair(){
+    bevel_gear_pair ();
+}
+
+module test_bevel_gear(){bevel_gear();}
+
+//bevel_gear();
+
+pi=3.1415926535897932384626433832795;
+
+//==================================================
+// Bevel Gears:
+// Two gears with the same cone distance, circular pitch (measured at the cone distance)
+// and pressure angle will mesh.
+
+module bevel_gear_pair (
+       gear1_teeth = 41,
+       gear2_teeth = 7,
+       axis_angle = 90,
+       outside_circular_pitch=1000)
+{
+       outside_pitch_radius1 = gear1_teeth * outside_circular_pitch / 360;
+       outside_pitch_radius2 = gear2_teeth * outside_circular_pitch / 360;
+       pitch_apex1=outside_pitch_radius2 * sin (axis_angle) +
+               (outside_pitch_radius2 * cos (axis_angle) + outside_pitch_radius1) / tan (axis_angle);
+       cone_distance = sqrt (pow (pitch_apex1, 2) + pow (outside_pitch_radius1, 2));
+       pitch_apex2 = sqrt (pow (cone_distance, 2) - pow (outside_pitch_radius2, 2));
+       echo ("cone_distance", cone_distance);
+       pitch_angle1 = asin (outside_pitch_radius1 / cone_distance);
+       pitch_angle2 = asin (outside_pitch_radius2 / cone_distance);
+       echo ("pitch_angle1, pitch_angle2", pitch_angle1, pitch_angle2);
+       echo ("pitch_angle1 + pitch_angle2", pitch_angle1 + pitch_angle2);
+
+       rotate([0,0,90])
+       translate ([0,0,pitch_apex1+20])
+       {
+               translate([0,0,-pitch_apex1])
+               bevel_gear (
+                       number_of_teeth=gear1_teeth,
+                       cone_distance=cone_distance,
+                       pressure_angle=30,
+                       outside_circular_pitch=outside_circular_pitch);
+
+               rotate([0,-(pitch_angle1+pitch_angle2),0])
+               translate([0,0,-pitch_apex2])
+               bevel_gear (
+                       number_of_teeth=gear2_teeth,
+                       cone_distance=cone_distance,
+                       pressure_angle=30,
+                       outside_circular_pitch=outside_circular_pitch);
+       }
+}
+
+//Bevel Gear Finishing Options:
+bevel_gear_flat = 0;
+bevel_gear_back_cone = 1;
+
+module bevel_gear (
+       number_of_teeth=11,
+       cone_distance=100,
+       face_width=20,
+       outside_circular_pitch=1000,
+       pressure_angle=30,
+       clearance = 0.2,
+       bore_diameter=5,
+       gear_thickness = 15,
+       backlash = 0,
+       involute_facets=0,
+       finish = -1)
+{
+       echo ("bevel_gear",
+               "teeth", number_of_teeth,
+               "cone distance", cone_distance,
+               face_width,
+               outside_circular_pitch,
+               pressure_angle,
+               clearance,
+               bore_diameter,
+               involute_facets,
+               finish);
+
+       // Pitch diameter: Diameter of pitch circle at the fat end of the gear.
+       outside_pitch_diameter  =  number_of_teeth * outside_circular_pitch / 180;
+       outside_pitch_radius = outside_pitch_diameter / 2;
+
+       // The height of the pitch apex.
+       pitch_apex = sqrt (pow (cone_distance, 2) - pow (outside_pitch_radius, 2));
+       pitch_angle = asin (outside_pitch_radius/cone_distance);
+
+       echo ("Num Teeth:", number_of_teeth, " Pitch Angle:", pitch_angle);
+
+       finish = (finish != -1) ? finish : (pitch_angle < 45) ? bevel_gear_flat : bevel_gear_back_cone;
+
+       apex_to_apex=cone_distance / cos (pitch_angle);
+       back_cone_radius = apex_to_apex * sin (pitch_angle);
+
+       // Calculate and display the pitch angle. This is needed to determine the angle to mount two meshing cone gears.
+
+       // Base Circle for forming the involute teeth shape.
+       base_radius = back_cone_radius * cos (pressure_angle);
+
+       // Diametrial pitch: Number of teeth per unit length.
+       pitch_diametrial = number_of_teeth / outside_pitch_diameter;
+
+       // Addendum: Radial distance from pitch circle to outside circle.
+       addendum = 1 / pitch_diametrial;
+       // Outer Circle
+       outer_radius = back_cone_radius + addendum;
+
+       // Dedendum: Radial distance from pitch circle to root diameter
+       dedendum = addendum + clearance;
+       dedendum_angle = atan (dedendum / cone_distance);
+       root_angle = pitch_angle - dedendum_angle;
+
+       root_cone_full_radius = tan (root_angle)*apex_to_apex;
+       back_cone_full_radius=apex_to_apex / tan (pitch_angle);
+
+       back_cone_end_radius =
+               outside_pitch_radius -
+               dedendum * cos (pitch_angle) -
+               gear_thickness / tan (pitch_angle);
+       back_cone_descent = dedendum * sin (pitch_angle) + gear_thickness;
+
+       // Root diameter: Diameter of bottom of tooth spaces.
+       root_radius = back_cone_radius - dedendum;
+
+       half_tooth_thickness = outside_pitch_radius * sin (360 / (4 * number_of_teeth)) - backlash / 4;
+       half_thick_angle = asin (half_tooth_thickness / back_cone_radius);
+
+       face_cone_height = apex_to_apex-face_width / cos (pitch_angle);
+       face_cone_full_radius = face_cone_height / tan (pitch_angle);
+       face_cone_descent = dedendum * sin (pitch_angle);
+       face_cone_end_radius =
+               outside_pitch_radius -
+               face_width / sin (pitch_angle) -
+               face_cone_descent / tan (pitch_angle);
+
+       // For the bevel_gear_flat finish option, calculate the height of a cube to select the portion of the gear that includes the full pitch face.
+       bevel_gear_flat_height = pitch_apex - (cone_distance - face_width) * cos (pitch_angle);
+
+//     translate([0,0,-pitch_apex])
+       difference ()
+       {
+               intersection ()
+               {
+                       union()
+                       {
+                               rotate (half_thick_angle)
+                               translate ([0,0,pitch_apex-apex_to_apex])
+                               cylinder ($fn=number_of_teeth*2, r1=root_cone_full_radius,r2=0,h=apex_to_apex);
+                               for (i = [1:number_of_teeth])
+//                             for (i = [1:1])
+                               {
+                                       rotate ([0,0,i*360/number_of_teeth])
+                                       {
+                                               involute_bevel_gear_tooth (
+                                                       back_cone_radius = back_cone_radius,
+                                                       root_radius = root_radius,
+                                                       base_radius = base_radius,
+                                                       outer_radius = outer_radius,
+                                                       pitch_apex = pitch_apex,
+                                                       cone_distance = cone_distance,
+                                                       half_thick_angle = half_thick_angle,
+                                                       involute_facets = involute_facets);
+                                       }
+                               }
+                       }
+
+                       if (finish == bevel_gear_back_cone)
+                       {
+                               translate ([0,0,-back_cone_descent])
+                               cylinder (
+                                       $fn=number_of_teeth*2,
+                                       r1=back_cone_end_radius,
+                                       r2=back_cone_full_radius*2,
+                                       h=apex_to_apex + back_cone_descent);
+                       }
+                       else
+                       {
+                               translate ([-1.5*outside_pitch_radius,-1.5*outside_pitch_radius,0])
+                               cube ([3*outside_pitch_radius,
+                                       3*outside_pitch_radius,
+                                       bevel_gear_flat_height]);
+                       }
+               }
+
+               if (finish == bevel_gear_back_cone)
+               {
+                       translate ([0,0,-face_cone_descent])
+                       cylinder (
+                               r1=face_cone_end_radius,
+                               r2=face_cone_full_radius * 2,
+                               h=face_cone_height + face_cone_descent+pitch_apex);
+               }
+
+               translate ([0,0,pitch_apex - apex_to_apex])
+               cylinder (r=bore_diameter/2,h=apex_to_apex);
+       }
+}
+
+module involute_bevel_gear_tooth (
+       back_cone_radius,
+       root_radius,
+       base_radius,
+       outer_radius,
+       pitch_apex,
+       cone_distance,
+       half_thick_angle,
+       involute_facets)
+{
+//     echo ("involute_bevel_gear_tooth",
+//             back_cone_radius,
+//             root_radius,
+//             base_radius,
+//             outer_radius,
+//             pitch_apex,
+//             cone_distance,
+//             half_thick_angle);
+
+       min_radius = max (base_radius*2,root_radius*2);
+
+       pitch_point =
+               involute (
+                       base_radius*2,
+                       involute_intersect_angle (base_radius*2, back_cone_radius*2));
+       pitch_angle = atan2 (pitch_point[1], pitch_point[0]);
+       centre_angle = pitch_angle + half_thick_angle;
+
+       start_angle = involute_intersect_angle (base_radius*2, min_radius);
+       stop_angle = involute_intersect_angle (base_radius*2, outer_radius*2);
+
+       res=(involute_facets!=0)?involute_facets:($fn==0)?5:$fn/4;
+
+       translate ([0,0,pitch_apex])
+       rotate ([0,-atan(back_cone_radius/cone_distance),0])
+       translate ([-back_cone_radius*2,0,-cone_distance*2])
+       union ()
+       {
+               for (i=[1:res])
+               {
+                       assign (
+                               point1=
+                                       involute (base_radius*2,start_angle+(stop_angle - start_angle)*(i-1)/res),
+                               point2=
+                                       involute (base_radius*2,start_angle+(stop_angle - start_angle)*(i)/res))
+                       {
+                               assign (
+                                       side1_point1 = rotate_point (centre_angle, point1),
+                                       side1_point2 = rotate_point (centre_angle, point2),
+                                       side2_point1 = mirror_point (rotate_point (centre_angle, point1)),
+                                       side2_point2 = mirror_point (rotate_point (centre_angle, point2)))
+                               {
+                                       polyhedron (
+                                               points=[
+                                                       [back_cone_radius*2+0.1,0,cone_distance*2],
+                                                       [side1_point1[0],side1_point1[1],0],
+                                                       [side1_point2[0],side1_point2[1],0],
+                                                       [side2_point2[0],side2_point2[1],0],
+                                                       [side2_point1[0],side2_point1[1],0],
+                                                       [0.1,0,0]],
+                                               triangles=[[0,1,2],[0,2,3],[0,3,4],[0,5,1],[1,5,2],[2,5,3],[3,5,4],[0,4,5]]);
+                               }
+                       }
+               }
+       }
+}
+
+module gear (
+       number_of_teeth=15,
+       circular_pitch=false, diametral_pitch=false,
+       pressure_angle=28,
+       clearance = 0.2,
+       gear_thickness=5,
+       rim_thickness=8,
+       rim_width=5,
+       hub_thickness=10,
+       hub_diameter=15,
+       bore_diameter=5,
+       circles=0,
+       backlash=0,
+       twist=0,
+       involute_facets=0,
+       flat=false)
+{
+       if (circular_pitch==false && diametral_pitch==false)
+               echo("MCAD ERROR: gear module needs either a diametral_pitch or circular_pitch");
+
+       //Convert diametrial pitch to our native circular pitch
+       circular_pitch = (circular_pitch!=false?circular_pitch:180/diametral_pitch);
+
+       // Pitch diameter: Diameter of pitch circle.
+       pitch_diameter  =  number_of_teeth * circular_pitch / 180;
+       pitch_radius = pitch_diameter/2;
+       echo ("Teeth:", number_of_teeth, " Pitch radius:", pitch_radius);
+
+       // Base Circle
+       base_radius = pitch_radius*cos(pressure_angle);
+
+       // Diametrial pitch: Number of teeth per unit length.
+       pitch_diametrial = number_of_teeth / pitch_diameter;
+
+       // Addendum: Radial distance from pitch circle to outside circle.
+       addendum = 1/pitch_diametrial;
+
+       //Outer Circle
+       outer_radius = pitch_radius+addendum;
+
+       // Dedendum: Radial distance from pitch circle to root diameter
+       dedendum = addendum + clearance;
+
+       // Root diameter: Diameter of bottom of tooth spaces.
+       root_radius = pitch_radius-dedendum;
+       backlash_angle = backlash / pitch_radius * 180 / pi;
+       half_thick_angle = (360 / number_of_teeth - backlash_angle) / 4;
+
+       // Variables controlling the rim.
+       rim_radius = root_radius - rim_width;
+
+       // Variables controlling the circular holes in the gear.
+       circle_orbit_diameter=hub_diameter/2+rim_radius;
+       circle_orbit_curcumference=pi*circle_orbit_diameter;
+
+       // Limit the circle size to 90% of the gear face.
+       circle_diameter=
+               min (
+                       0.70*circle_orbit_curcumference/circles,
+                       (rim_radius-hub_diameter/2)*0.9);
+
+       difference()
+       {
+               union ()
+               {
+                       difference ()
+                       {
+                               linear_exturde_flat_option(flat=flat, height=rim_thickness, convexity=10, twist=twist)
+                               gear_shape (
+                                       number_of_teeth,
+                                       pitch_radius = pitch_radius,
+                                       root_radius = root_radius,
+                                       base_radius = base_radius,
+                                       outer_radius = outer_radius,
+                                       half_thick_angle = half_thick_angle,
+                                       involute_facets=involute_facets);
+
+                               if (gear_thickness < rim_thickness)
+                                       translate ([0,0,gear_thickness])
+                                       cylinder (r=rim_radius,h=rim_thickness-gear_thickness+1);
+                       }
+                       if (gear_thickness > rim_thickness)
+                               linear_exturde_flat_option(flat=flat, height=gear_thickness)
+                               circle (r=rim_radius);
+                       if (flat == false && hub_thickness > gear_thickness)
+                               translate ([0,0,gear_thickness])
+                               linear_exturde_flat_option(flat=flat, height=hub_thickness-gear_thickness)
+                               circle (r=hub_diameter/2);
+               }
+               translate ([0,0,-1])
+               linear_exturde_flat_option(flat =flat, height=2+max(rim_thickness,hub_thickness,gear_thickness))
+               circle (r=bore_diameter/2);
+               if (circles>0)
+               {
+                       for(i=[0:circles-1])
+                               rotate([0,0,i*360/circles])
+                               translate([circle_orbit_diameter/2,0,-1])
+                               linear_exturde_flat_option(flat =flat, height=max(gear_thickness,rim_thickness)+3)
+                               circle(r=circle_diameter/2);
+               }
+       }
+}
+
+module linear_exturde_flat_option(flat =false, height = 10, center = false, convexity = 2, twist = 0)
+{
+       if(flat==false)
+       {
+               linear_extrude(height = height, center = center, convexity = convexity, twist= twist) child(0);
+       }
+       else
+       {
+               child(0);
+       }
+
+}
+
+module gear_shape (
+       number_of_teeth,
+       pitch_radius,
+       root_radius,
+       base_radius,
+       outer_radius,
+       half_thick_angle,
+       involute_facets)
+{
+       union()
+       {
+               rotate (half_thick_angle) circle ($fn=number_of_teeth*2, r=root_radius);
+
+               for (i = [1:number_of_teeth])
+               {
+                       rotate ([0,0,i*360/number_of_teeth])
+                       {
+                               involute_gear_tooth (
+                                       pitch_radius = pitch_radius,
+                                       root_radius = root_radius,
+                                       base_radius = base_radius,
+                                       outer_radius = outer_radius,
+                                       half_thick_angle = half_thick_angle,
+                                       involute_facets=involute_facets);
+                       }
+               }
+       }
+}
+
+module involute_gear_tooth (
+       pitch_radius,
+       root_radius,
+       base_radius,
+       outer_radius,
+       half_thick_angle,
+       involute_facets)
+{
+       min_radius = max (base_radius,root_radius);
+
+       pitch_point = involute (base_radius, involute_intersect_angle (base_radius, pitch_radius));
+       pitch_angle = atan2 (pitch_point[1], pitch_point[0]);
+       centre_angle = pitch_angle + half_thick_angle;
+
+       start_angle = involute_intersect_angle (base_radius, min_radius);
+       stop_angle = involute_intersect_angle (base_radius, outer_radius);
+
+       res=(involute_facets!=0)?involute_facets:($fn==0)?5:$fn/4;
+
+       union ()
+       {
+               for (i=[1:res])
+               assign (
+                       point1=involute (base_radius,start_angle+(stop_angle - start_angle)*(i-1)/res),
+                       point2=involute (base_radius,start_angle+(stop_angle - start_angle)*i/res))
+               {
+                       assign (
+                               side1_point1=rotate_point (centre_angle, point1),
+                               side1_point2=rotate_point (centre_angle, point2),
+                               side2_point1=mirror_point (rotate_point (centre_angle, point1)),
+                               side2_point2=mirror_point (rotate_point (centre_angle, point2)))
+                       {
+                               polygon (
+                                       points=[[0,0],side1_point1,side1_point2,side2_point2,side2_point1],
+                                       paths=[[0,1,2,3,4,0]]);
+                       }
+               }
+       }
+}
+
+// Mathematical Functions
+//===============
+
+// Finds the angle of the involute about the base radius at the given distance (radius) from it's center.
+//source: http://www.mathhelpforum.com/math-help/geometry/136011-circle-involute-solving-y-any-given-x.html
+
+function involute_intersect_angle (base_radius, radius) = sqrt (pow (radius/base_radius, 2) - 1) * 180 / pi;
+
+// Calculate the involute position for a given base radius and involute angle.
+
+function rotated_involute (rotate, base_radius, involute_angle) =
+[
+       cos (rotate) * involute (base_radius, involute_angle)[0] + sin (rotate) * involute (base_radius, involute_angle)[1],
+       cos (rotate) * involute (base_radius, involute_angle)[1] - sin (rotate) * involute (base_radius, involute_angle)[0]
+];
+
+function mirror_point (coord) =
+[
+       coord[0],
+       -coord[1]
+];
+
+function rotate_point (rotate, coord) =
+[
+       cos (rotate) * coord[0] + sin (rotate) * coord[1],
+       cos (rotate) * coord[1] - sin (rotate) * coord[0]
+];
+
+function involute (base_radius, involute_angle) =
+[
+       base_radius*(cos (involute_angle) + involute_angle*pi/180*sin (involute_angle)),
+       base_radius*(sin (involute_angle) - involute_angle*pi/180*cos (involute_angle))
+];
+
+
+// Test Cases
+//===============
+
+module test_gears()
+{
+       translate([17,-15])
+       {
+               gear (number_of_teeth=17,
+                       circular_pitch=500,
+                       circles=8);
+
+               rotate ([0,0,360*4/17])
+               translate ([39.088888,0,0])
+               {
+                       gear (number_of_teeth=11,
+                               circular_pitch=500,
+                               hub_diameter=0,
+                               rim_width=65);
+                       translate ([0,0,8])
+                       {
+                               gear (number_of_teeth=6,
+                                       circular_pitch=300,
+                                       hub_diameter=0,
+                                       rim_width=5,
+                                       rim_thickness=6,
+                                       pressure_angle=31);
+                               rotate ([0,0,360*5/6])
+                               translate ([22.5,0,1])
+                               gear (number_of_teeth=21,
+                                       circular_pitch=300,
+                                       bore_diameter=2,
+                                       hub_diameter=4,
+                                       rim_width=1,
+                                       hub_thickness=4,
+                                       rim_thickness=4,
+                                       gear_thickness=3,
+                                       pressure_angle=31);
+                       }
+               }
+
+               translate ([-61.1111111,0,0])
+               {
+                       gear (number_of_teeth=27,
+                               circular_pitch=500,
+                               circles=5,
+                               hub_diameter=2*8.88888889);
+
+                       translate ([0,0,10])
+                       {
+                               gear (
+                                       number_of_teeth=14,
+                                       circular_pitch=200,
+                                       pressure_angle=5,
+                                       clearance = 0.2,
+                                       gear_thickness = 10,
+                                       rim_thickness = 10,
+                                       rim_width = 15,
+                                       bore_diameter=5,
+                                       circles=0);
+                               translate ([13.8888888,0,1])
+                               gear (
+                                       number_of_teeth=11,
+                                       circular_pitch=200,
+                                       pressure_angle=5,
+                                       clearance = 0.2,
+                                       gear_thickness = 10,
+                                       rim_thickness = 10,
+                                       rim_width = 15,
+                                       hub_thickness = 20,
+                                       hub_diameter=2*7.222222,
+                                       bore_diameter=5,
+                                       circles=0);
+                       }
+               }
+
+               rotate ([0,0,360*-5/17])
+               translate ([44.444444444,0,0])
+               gear (number_of_teeth=15,
+                       circular_pitch=500,
+                       hub_diameter=10,
+                       rim_width=5,
+                       rim_thickness=5,
+                       gear_thickness=4,
+                       hub_thickness=6,
+                       circles=9);
+
+               rotate ([0,0,360*-1/17])
+               translate ([30.5555555,0,-1])
+               gear (number_of_teeth=5,
+                       circular_pitch=500,
+                       hub_diameter=0,
+                       rim_width=5,
+                       rim_thickness=10);
+       }
+}
+
+module meshing_double_helix ()
+{
+       test_double_helix_gear ();
+
+       mirror ([0,1,0])
+       translate ([58.33333333,0,0])
+       test_double_helix_gear (teeth=13,circles=6);
+}
+
+module test_double_helix_gear (
+       teeth=17,
+       circles=8)
+{
+       //double helical gear
+       {
+               twist=200;
+               height=20;
+               pressure_angle=30;
+
+               gear (number_of_teeth=teeth,
+                       circular_pitch=700,
+                       pressure_angle=pressure_angle,
+                       clearance = 0.2,
+                       gear_thickness = height/2*0.5,
+                       rim_thickness = height/2,
+                       rim_width = 5,
+                       hub_thickness = height/2*1.2,
+                       hub_diameter=15,
+                       bore_diameter=5,
+                       circles=circles,
+                       twist=twist/teeth);
+               mirror([0,0,1])
+               gear (number_of_teeth=teeth,
+                       circular_pitch=700,
+                       pressure_angle=pressure_angle,
+                       clearance = 0.2,
+                       gear_thickness = height/2,
+                       rim_thickness = height/2,
+                       rim_width = 5,
+                       hub_thickness = height/2,
+                       hub_diameter=15,
+                       bore_diameter=5,
+                       circles=circles,
+                       twist=twist/teeth);
+       }
+}
+
+module test_backlash ()
+{
+       backlash = 2;
+       teeth = 15;
+
+       translate ([-29.166666,0,0])
+       {
+               translate ([58.3333333,0,0])
+               rotate ([0,0,-360/teeth/4])
+               gear (
+                       number_of_teeth = teeth,
+                       circular_pitch=700,
+                       gear_thickness = 12,
+                       rim_thickness = 15,
+                       rim_width = 5,
+                       hub_thickness = 17,
+                       hub_diameter=15,
+                       bore_diameter=5,
+                       backlash = 2,
+                       circles=8);
+
+               rotate ([0,0,360/teeth/4])
+               gear (
+                       number_of_teeth = teeth,
+                       circular_pitch=700,
+                       gear_thickness = 12,
+                       rim_thickness = 15,
+                       rim_width = 5,
+                       hub_thickness = 17,
+                       hub_diameter=15,
+                       bore_diameter=5,
+                       backlash = 2,
+                       circles=8);
+       }
+
+       color([0,0,128,0.5])
+       translate([0,0,-5])
+       cylinder ($fn=20,r=backlash / 4,h=25);
+}
+

diff --git a/scad/MCAD/layouts.scad b/scad/MCAD/layouts.scad
new file mode 100644 (file)
index 0000000..bec8de7
--- /dev/null
+++ b/scad/MCAD/layouts.scad
@@ -0,0 +1,44 @@
+  /*
+ *  OpenSCAD Layout Library (www.openscad.org)
+ *  Copyright (C) 2012 Peter Uithoven
+ *
+ *  License: LGPL 2.1 or later
+*/
+
+//list(iHeight);
+//grid(iWidth,iHeight,inYDir = true,limit=3)
+
+// Examples:
+/*list(15)
+{
+       square([25,10]);
+       square([25,10]);
+    square([25,10]);
+       square([25,10]);
+    square([25,10]);
+}*/
+/*grid(30,15,false,2)
+{
+       square([25,10]);
+       square([25,10]);
+    square([25,10]);
+       square([25,10]);
+    square([25,10]);
+}*/
+
+//----------------------
+
+module list(iHeight)
+{
+       for (i = [0 : $children-1]) 
+               translate([0,i*iHeight]) child(i);
+}
+module grid(iWidth,iHeight,inYDir = true,limit=3)
+{
+       for (i = [0 : $children-1]) 
+       {
+               translate([(inYDir)? (iWidth)*(i%limit) : (iWidth)*floor(i/limit),
+                                       (inYDir)? (iHeight)*floor(i/limit) : (iHeight)*(i%limit)])
+                                       child(i);
+       }
+}
\ No newline at end of file

diff --git a/scad/MCAD/lgpl-2.1.txt b/scad/MCAD/lgpl-2.1.txt
new file mode 100644 (file)
index 0000000..4362b49
--- /dev/null
+++ b/scad/MCAD/lgpl-2.1.txt
@@ -0,0 +1,502 @@
+                  GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 2.1, February 1999
+
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+conditions either of that version or of any later version published by
+the Free Software Foundation.  If the Library does not specify a
+license version number, you may choose any version ever published by
+the Free Software Foundation.
+\f
+  14. If you wish to incorporate parts of the Library into other free
+programs whose distribution conditions are incompatible with these,
+write to the author to ask for permission.  For software which is
+copyrighted by the Free Software Foundation, write to the Free
+Software Foundation; we sometimes make exceptions for this.  Our
+decision will be guided by the two goals of preserving the free status
+of all derivatives of our free software and of promoting the sharing
+and reuse of software generally.
+
+                            NO WARRANTY
+
+  15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
+WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
+EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
+OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
+KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
+LIBRARY IS WITH YOU.  SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
+THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
+WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
+AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
+FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
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+LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
+RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
+FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
+SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+\f
+           How to Apply These Terms to Your New Libraries
+
+  If you develop a new library, and you want it to be of the greatest
+possible use to the public, we recommend making it free software that
+everyone can redistribute and change.  You can do so by permitting
+redistribution under these terms (or, alternatively, under the terms of the
+ordinary General Public License).
+
+  To apply these terms, attach the following notices to the library.  It is
+safest to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the library's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+Also add information on how to contact you by electronic and paper mail.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the library, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the
+  library `Frob' (a library for tweaking knobs) written by James Random Hacker.
+
+  <signature of Ty Coon>, 1 April 1990
+  Ty Coon, President of Vice
+
+That's all there is to it!

diff --git a/scad/MCAD/libtriangles.scad b/scad/MCAD/libtriangles.scad
new file mode 100644 (file)
index 0000000..d5f207e
--- /dev/null
+++ b/scad/MCAD/libtriangles.scad
@@ -0,0 +1,60 @@
+//Copyright (C) 2013 Alex Davies
+//License: LGPL 2.1 or later
+//todo, make library work with negative lengths by adding triangles to the inside of every surface. basicaly copy and paste the current triangles set and reverse the first and last digit of every triangle. In 4 character traingles switcht the middle ones around as well. Not sure if that' actually useful though.
+
+module rightpyramid(rightpyramidx, rightpyramidy, rightpyramidz) {
+       polyhedron ( points = [[0,0,0], 
+                       [rightpyramidx, 0, 0], 
+                       [0, rightpyramidy, 0], 
+                       [rightpyramidx, rightpyramidy, 0],
+                       [rightpyramidx/2, rightpyramidy, rightpyramidz]], 
+
+       triangles = [[0,1,2],[2,1,3],[4,1,0],[3,1,4],[2,3,4],[0,2,4]]);
+
+}
+
+module cornerpyramid(cornerpyramidx, cornerpyramidy, cornerpyramidz) {
+       polyhedron ( points = [[0,0,0], 
+                       [cornerpyramidx, 0, 0], 
+                       [0, cornerpyramidy, 0], 
+                       [cornerpyramidx, cornerpyramidy, 0],
+                       [0, cornerpyramidy, cornerpyramidz]], 
+
+       triangles = [[0,1,2],[2,1,3],[4,1,0],[3,1,4],[2,3,4],[0,2,4]]);
+
+}
+
+module eqlpyramid(eqlpyramidx, eqlpyramidy, eqlpyramidz) {
+       polyhedron ( points = [[0,0,0], 
+                       [eqlpyramidx, 0, 0], 
+                       [0, eqlpyramidy, 0], 
+                       [eqlpyramidx, eqlpyramidy, 0],
+                       [eqlpyramidx/2, eqlpyramidy/2, eqlpyramidz]], 
+
+       triangles = [[0,1,2],[2,1,3],[4,1,0],[3,1,4],[2,3,4],[0,2,4]]);
+
+}
+
+
+module rightprism(rightprismx,rightprismy,rightprismz){
+       polyhedron ( points = [[0,0,0],
+                       [rightprismx,0,0],
+                       [rightprismx,rightprismy,0],
+                       [0,rightprismy,0],
+                       [0,rightprismy,rightprismz],
+                       [0,0,rightprismz]], 
+       triangles = [[0,1,2,3],[5,1,0],[5,4,2,1],[4,3,2],[0,3,4,5]]);
+}
+
+
+
+module eqlprism(rightprismx,rightprismy,rightprismz){
+       polyhedron ( points = [[0,0,0],
+                       [rightprismx,0,0],
+                       [rightprismx,rightprismy,0],
+                       [0,rightprismy,0],
+                       [rightprismx/2,rightprismy,rightprismz],
+                       [rightprismx/2,0,rightprismz]], 
+       triangles = [[0,1,2,3],[5,1,0],[5,4,2,1],[4,3,2],[0,3,4,5]]);
+}
+

diff --git a/scad/MCAD/materials.scad b/scad/MCAD/materials.scad
new file mode 100644 (file)
index 0000000..f75edf7
--- /dev/null
+++ b/scad/MCAD/materials.scad
@@ -0,0 +1,45 @@
+/*
+ * Material colors.
+ * 
+ * Originally by Hans Häggström, 2010.
+ * Dual licenced under Creative Commons Attribution-Share Alike 3.0 and LGPL2 or later
+ */
+
+// Material colors
+Oak = [0.65, 0.5, 0.4];
+Pine = [0.85, 0.7, 0.45];
+Birch = [0.9, 0.8, 0.6];
+FiberBoard = [0.7, 0.67, 0.6];
+BlackPaint = [0.2, 0.2, 0.2];
+Iron = [0.36, 0.33, 0.33];
+Steel = [0.65, 0.67, 0.72];
+Stainless = [0.45, 0.43, 0.5];
+Aluminum = [0.77, 0.77, 0.8];
+Brass = [0.88, 0.78, 0.5];
+Transparent = [1, 1, 1, 0.2];
+
+// Example, uncomment to view
+//color_demo();
+
+module color_demo(){
+    // Wood
+    colorTest(Oak, 0, 0);
+    colorTest(Pine, 1, 0);
+    colorTest(Birch, 2, 0);
+
+    // Metals
+    colorTest(Iron, 0, 1);
+    colorTest(Steel, 1, 1);
+    colorTest(Stainless, 2, 1);
+    colorTest(Aluminum, 3, 1);
+
+    // Mixboards
+    colorTest(FiberBoard, 0, 2);
+
+    // Paints
+    colorTest(BlackPaint, 0, 3);
+}
+
+module colorTest(col, row=0, c=0) {
+  color(col) translate([row * 30,c*30,0]) sphere(r=10);
+}

diff --git a/scad/MCAD/math.scad b/scad/MCAD/math.scad
new file mode 100644 (file)
index 0000000..25b6721
--- /dev/null
+++ b/scad/MCAD/math.scad
@@ -0,0 +1,6 @@
+// MIT license
+
+include <constants.scad>
+
+function deg(angle) = 360*angle/TAU;
+

diff --git a/scad/MCAD/metric_fastners.scad b/scad/MCAD/metric_fastners.scad
new file mode 100644 (file)
index 0000000..2849fea
--- /dev/null
+++ b/scad/MCAD/metric_fastners.scad
@@ -0,0 +1,111 @@
+/*
+ *  OpenSCAD Metric Fastners Library (www.openscad.org)
+ *  Copyright (C) 2010-2011  Giles Bathgate
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License,
+ *  LGPL version 2.1, or (at your option) any later version of the GPL.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+*/
+
+$fn=50;
+apply_chamfer=true;
+
+module cap_bolt(dia,len)
+{
+       e=1.5*dia;
+       h1=1.25*dia;
+       cylinder(r=dia/2,h=len);
+       translate([0,0,-h1]) cylinder(r=e/2,h=h1);
+}
+
+module csk_bolt(dia,len)
+{
+       h1=0.6*dia;
+       h2=len-h1;
+       cylinder(r=dia/2,h=h2);
+       cylinder(r1=dia,r2=dia/2,h=h1);
+}
+
+module washer(dia)
+{
+       t=0.1*dia;
+       difference()
+       {
+               cylinder(r=dia,h=t);
+               translate([0,0,-t/2])cylinder(r=dia/2,h=t*2);
+       }
+}
+
+module flat_nut(dia)
+{
+       m=0.8*dia;
+       e=1.8*dia;
+       c=0.2*dia;
+       difference()
+       {
+               cylinder(r=e/2,h=m,$fn=6);
+               translate([0,0,-m/2])cylinder(r=dia/2,h=m*2);
+               if(apply_chamfer)
+                   translate([0,0,c])cylinder_chamfer(e/2,c);
+       }
+}
+
+module bolt(dia,len)
+{
+       e=1.8*dia;
+       k=0.7*dia;
+       c=0.2*dia;
+       difference()
+       {
+               cylinder(r=e/2,h=k,$fn=6);
+               if(apply_chamfer)
+                   translate([0,0,c])cylinder_chamfer(e/2,c);
+       }
+
+       cylinder(r=dia/2,h=len);
+
+}
+
+module cylinder_chamfer(r1,r2)
+{
+       t=r1-r2;
+       p=r2*2;
+       rotate_extrude()
+       difference()
+       {
+               translate([t,-p])square([p,p]);
+               translate([t,0])circle(r2);
+       }
+}
+
+module chamfer(len,r)
+{
+       p=r*2;
+       linear_extrude(height=len)
+       difference()
+       {
+               square([p,p]);
+               circle(r);
+       }
+}
+
+union()
+{
+//csk_bolt(3,14);
+//washer(3);
+//flat_nut(3);
+//bolt(4,14);
+//cylinder_chamfer(8,1);
+//chamfer(10,2);
+}

diff --git a/scad/MCAD/motors.scad b/scad/MCAD/motors.scad
new file mode 100644 (file)
index 0000000..d575164
--- /dev/null
+++ b/scad/MCAD/motors.scad
@@ -0,0 +1,98 @@
+// Copyright 2010 D1plo1d
+
+// This library is dual licensed under the GPL 3.0 and the GNU Lesser General Public License as per http://creativecommons.org/licenses/LGPL/2.1/ .
+
+include <math.scad>
+
+
+//generates a motor mount for the specified nema standard #.
+module stepper_motor_mount(nema_standard,slide_distance=0, mochup=true, tolerance=0) {
+       //dimensions from:
+       // http://www.numberfactory.com/NEMA%20Motor%20Dimensions.htm
+       if (nema_standard == 17)
+       {
+               _stepper_motor_mount(
+                       motor_shaft_diameter = 0.1968*mm_per_inch,
+                       motor_shaft_length = 0.945*mm_per_inch,
+                       pilot_diameter = 0.866*mm_per_inch,
+                       pilot_length = 0.80*mm_per_inch,
+                       mounting_bolt_circle = 1.725*mm_per_inch,
+                       bolt_hole_size = 3.5,
+                       bolt_hole_distance = 1.220*mm_per_inch,
+                       slide_distance = slide_distance,
+                       mochup = mochup,
+                       tolerance=tolerance);
+       }
+       if (nema_standard == 23)
+       {
+               _stepper_motor_mount(
+                       motor_shaft_diameter = 0.250*mm_per_inch,
+                       motor_shaft_length = 0.81*mm_per_inch,
+                       pilot_diameter = 1.500*mm_per_inch,
+                       pilot_length = 0.062*mm_per_inch,
+                       mounting_bolt_circle = 2.625*mm_per_inch,
+                       bolt_hole_size = 0.195*mm_per_inch,
+                       bolt_hole_distance = 1.856*mm_per_inch,
+                       slide_distance = slide_distance,
+                       mochup = mochup,
+                       tolerance=tolerance);
+       }
+       
+}
+
+
+//inner mehod for creating a stepper motor mount of any dimensions
+module _stepper_motor_mount(
+       motor_shaft_diameter,
+       motor_shaft_length,
+       pilot_diameter,
+       pilot_length,
+       mounting_bolt_circle,
+       bolt_hole_size,
+       bolt_hole_distance,
+       slide_distance = 0,
+       motor_length = 40, //arbitray - not standardized
+       mochup,
+       tolerance = 0
+)
+{
+       union()
+       {
+       // == centered mount points ==
+       //mounting circle inset
+       translate([0,slide_distance/2,0]) circle(r = pilot_diameter/2 + tolerance);
+       square([pilot_diameter,slide_distance],center=true);
+       translate([0,-slide_distance/2,0]) circle(r = pilot_diameter/2 + tolerance);
+
+       //todo: motor shaft hole
+       
+       //mounting screw holes
+       for (x = [-1,1])
+       {
+               for (y = [-1,1])
+               {
+                       translate([x*bolt_hole_distance/2,y*bolt_hole_distance/2,0])
+                       {
+                               translate([0,slide_distance/2,0]) circle(bolt_hole_size/2 + tolerance);
+                               translate([0,-slide_distance/2,0]) circle(bolt_hole_size/2 + tolerance);
+                               square([bolt_hole_size+2*tolerance,slide_distance],center=true);
+                       }
+               }
+       }
+       // == motor mock-up ==
+       //motor box
+       if (mochup == true)
+       {
+               %translate([0,0,-5]) cylinder(h = 5, r = pilot_diameter/2);
+               %translate(v=[0,0,-motor_length/2])
+               {
+                       cube(size=[bolt_hole_distance+bolt_hole_size+5,bolt_hole_distance+bolt_hole_size+5,motor_length], center = true);
+               }
+               //shaft
+               %translate(v=[0,0,-(motor_length-motor_shaft_length-2)/2])
+               {
+                       %cylinder(r=motor_shaft_diameter/2,h=motor_length+motor_shaft_length--1, center = true);
+               }
+       }
+       }
+}

diff --git a/scad/MCAD/nuts_and_bolts.scad b/scad/MCAD/nuts_and_bolts.scad
new file mode 100644 (file)
index 0000000..8cb2a87
--- /dev/null
+++ b/scad/MCAD/nuts_and_bolts.scad
@@ -0,0 +1,183 @@
+// Copyright 2010 D1plo1d
+
+// This library is dual licensed under the GPL 3.0 and the GNU Lesser General Public License as per http://creativecommons.org/licenses/LGPL/2.1/ .
+
+//testNutsAndBolts();
+
+module SKIPtestNutsAndBolts()
+{
+       $fn = 360;
+       translate([0,15])nutHole(3, proj=2);
+       boltHole(3, length= 30, proj=2);
+}
+
+MM = "mm";
+INCH = "inch"; //Not yet supported
+
+//Based on: http://www.roymech.co.uk/Useful_Tables/Screws/Hex_Screws.htm
+METRIC_NUT_AC_WIDTHS =
+[
+       -1, //0 index is not used but reduces computation
+       -1,
+       -1,
+       6.40,//m3
+       8.10,//m4
+       9.20,//m5
+       11.50,//m6
+       -1,
+       15.00,//m8
+       -1,
+       19.60,//m10
+       -1,
+       22.10,//m12
+       -1,
+       -1,
+       -1,
+       27.70,//m16
+       -1,
+       -1,
+       -1,
+       34.60,//m20
+       -1,
+       -1,
+       -1,
+       41.60,//m24
+       -1,
+       -1,
+       -1,
+       -1,
+       -1,
+       53.1,//m30
+       -1,
+       -1,
+       -1,
+       -1,
+       -1,
+       63.5//m36
+];
+METRIC_NUT_THICKNESS =
+[
+       -1, //0 index is not used but reduces computation
+       -1,
+       -1,
+       2.40,//m3
+       3.20,//m4
+       4.00,//m5
+       5.00,//m6
+       -1,
+       6.50,//m8
+       -1,
+       8.00,//m10
+       -1,
+       10.00,//m12
+       -1,
+       -1,
+       -1,
+       13.00,//m16
+       -1,
+       -1,
+       -1,
+       16.00//m20
+       -1,
+       -1,
+       -1,
+       19.00,//m24
+       -1,
+       -1,
+       -1,
+       -1,
+       -1,
+       24.00,//m30
+       -1,
+       -1,
+       -1,
+       -1,
+       -1,
+       29.00//m36
+];
+
+COURSE_METRIC_BOLT_MAJOR_THREAD_DIAMETERS =
+[//based on max values
+       -1, //0 index is not used but reduces computation
+       -1,
+       -1,
+       2.98,//m3
+       3.978,//m4
+       4.976,//m5
+       5.974,//m6
+       -1,
+       7.972,//m8
+       -1,
+       9.968,//m10
+       -1,
+       11.966,//m12
+       -1,
+       -1,
+       -1,
+       15.962,//m16
+       -1,
+       -1,
+       -1,
+       19.958,//m20
+       -1,
+       -1,
+       -1,
+       23.952,//m24
+       -1,
+       -1,
+       -1,
+       -1,
+       -1,
+       29.947,//m30
+       -1,
+       -1,
+       -1,
+       -1,
+       -1,
+       35.940//m36
+];
+
+module nutHole(size, units=MM, tolerance = +0.0001, proj = -1)
+{
+       //takes a metric screw/nut size and looksup nut dimensions
+       radius = METRIC_NUT_AC_WIDTHS[size]/2+tolerance;
+       height = METRIC_NUT_THICKNESS[size]+tolerance;
+       if (proj == -1)
+       {
+               cylinder(r= radius, h=height, $fn = 6, center=[0,0]);
+       }
+       if (proj == 1)
+       {
+               circle(r= radius, $fn = 6);
+       }
+       if (proj == 2)
+       {
+               translate([-radius/2, 0])
+                       square([radius*2, height]);
+       }
+}
+
+module boltHole(size, units=MM, length, tolerance = +0.0001, proj = -1)
+{
+       radius = COURSE_METRIC_BOLT_MAJOR_THREAD_DIAMETERS[size]/2+tolerance;
+//TODO: proper screw cap values
+       capHeight = METRIC_NUT_THICKNESS[size]+tolerance; //METRIC_BOLT_CAP_HEIGHTS[size]+tolerance;
+       capRadius = METRIC_NUT_AC_WIDTHS[size]/2+tolerance; //METRIC_BOLT_CAP_RADIUS[size]+tolerance;
+
+       if (proj == -1)
+       {
+       translate([0, 0, -capHeight])
+               cylinder(r= capRadius, h=capHeight);
+       cylinder(r = radius, h = length);
+       }
+       if (proj == 1)
+       {
+               circle(r = radius);
+       }
+       if (proj == 2)
+       {
+               translate([-capRadius/2, -capHeight])
+                       square([capRadius*2, capHeight]);
+               square([radius*2, length]);
+       }
+}

diff --git a/scad/MCAD/openscad_testing.py b/scad/MCAD/openscad_testing.py
new file mode 100644 (file)
index 0000000..64d96c7
--- /dev/null
+++ b/scad/MCAD/openscad_testing.py
@@ -0,0 +1,49 @@
+import py
+
+from openscad_utils import *
+
+
+temppath = py.test.ensuretemp('MCAD')
+
+def pytest_generate_tests(metafunc):
+    if "modpath" in metafunc.funcargnames:
+        for fpath, modnames in collect_test_modules().items():
+            #os.system("cp %s %s/" % (fpath, temppath))
+            if "modname" in metafunc.funcargnames:
+                for modname in modnames:
+                    metafunc.addcall(funcargs=dict(modname=modname, modpath=fpath))
+            else:
+                metafunc.addcall(funcargs=dict(modpath=fpath))
+
+
+def test_module_compile(modname, modpath):
+    tempname = modpath.basename + '-' + modname + '.scad'
+    fpath = temppath.join(tempname)
+    stlpath = temppath.join(tempname + ".stl")
+    f = fpath.open('w')
+    code = """
+//generated testfile
+use <%s>
+
+%s();
+""" % (modpath, modname)
+    print code
+    f.write(code)
+    f.flush()
+    output = call_openscad(path=fpath, stlpath=stlpath, timeout=15)
+    print output
+    assert output[0] is 0
+    for s in ("warning", "error"):
+        assert s not in output[2].strip().lower()
+    assert len(stlpath.readlines()) > 2
+
+def test_file_compile(modpath):
+    stlpath = temppath.join(modpath.basename + "-test.stl")
+    output = call_openscad(path=modpath, stlpath=stlpath)
+    print output
+    assert output[0] is 0
+    for s in ("warning", "error"):
+        assert s not in output[2].strip().lower()
+    assert len(stlpath.readlines()) == 2
+
+

diff --git a/scad/MCAD/openscad_utils.py b/scad/MCAD/openscad_utils.py
new file mode 100644 (file)
index 0000000..3f2875e
--- /dev/null
+++ b/scad/MCAD/openscad_utils.py
@@ -0,0 +1,62 @@
+import py, re, os, signal, time, commands
+from subprocess import Popen, PIPE
+
+mod_re = (r"\bmodule\s+(", r")\s*\(\s*")
+func_re = (r"\bfunction\s+(", r")\s*\(")
+
+def extract_definitions(fpath, name_re=r"\w+", def_re=""):
+    regex = name_re.join(def_re)
+    matcher = re.compile(regex)
+    return (m.group(1) for m in matcher.finditer(fpath.read()))
+
+def extract_mod_names(fpath, name_re=r"\w+"):
+    return extract_definitions(fpath, name_re=name_re, def_re=mod_re)
+
+def extract_func_names(fpath, name_re=r"\w+"):
+    return extract_definitions(fpath, name_re=name_re, def_re=func_re)
+
+def collect_test_modules(dirpath=None):
+    dirpath = dirpath or py.path.local("./")
+    print "Collecting openscad test module names"
+
+    test_files = {}
+    for fpath in dirpath.visit('*.scad'):
+        #print fpath
+        modules = extract_mod_names(fpath, r"test\w*")
+        #functions = extract_func_names(fpath, r"test\w*")
+        test_files[fpath] = modules
+    return test_files
+
+class Timeout(Exception): pass
+
+def call_openscad(path, stlpath, timeout=5):
+    command = ['openscad', '-s', str(stlpath),  str(path)]
+    print command
+    if timeout:
+        try:
+            proc = Popen(command,
+                stdout=PIPE, stderr=PIPE, close_fds=True)
+            calltime = time.time()
+            time.sleep(0.05)
+            #print calltime
+            while True:
+                if proc.poll() is not None:
+                    break
+                time.sleep(0.5)
+                #print time.time()
+                if time.time() > calltime + timeout:
+                    raise Timeout()
+        finally:
+            try:
+                proc.terminate()
+                proc.kill()
+            except OSError:
+                pass
+
+        return (proc.returncode,) + proc.communicate()
+    else:
+        output = commands.getstatusoutput(" ".join(command))
+        return output + ('', '')
+
+def parse_output(text):
+    pass

diff --git a/scad/MCAD/regular_shapes.scad b/scad/MCAD/regular_shapes.scad
new file mode 100644 (file)
index 0000000..67fee52
--- /dev/null
+++ b/scad/MCAD/regular_shapes.scad
@@ -0,0 +1,206 @@
+/*
+ *  OpenSCAD Shapes Library (www.openscad.org)
+ *  Copyright (C) 2010-2011  Giles Bathgate
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License,
+ *  LGPL version 2.1, or (at your option) any later version of the GPL.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+*/
+
+// 2D regular shapes
+
+module triangle(radius)
+{
+  o=radius/2;          //equivalent to radius*sin(30)
+  a=radius*sqrt(3)/2;  //equivalent to radius*cos(30)
+  polygon(points=[[-a,-o],[0,radius],[a,-o]],paths=[[0,1,2]]);
+}
+
+module reg_polygon(sides,radius)
+{
+  function dia(r) = sqrt(pow(r*2,2)/2);  //sqrt(r*2^2/2) if only we had an exponention op
+  if(sides<2) square([radius,0]);
+  if(sides==3) triangle(radius);
+  if(sides==4) square([dia(radius),dia(radius)],center=true);
+  if(sides>4) circle(r=radius,$fn=sides);
+}
+
+module pentagon(radius)
+{
+  reg_polygon(5,radius);
+}
+
+module hexagon(radius)
+{
+  reg_polygon(6,radius);
+}
+
+module heptagon(radius)
+{
+  reg_polygon(7,radius);
+}
+
+module octagon(radius)
+{
+  reg_polygon(8,radius);
+}
+
+module nonagon(radius)
+{
+  reg_polygon(9,radius);
+}
+
+module decagon(radius)
+{
+  reg_polygon(10,radius);
+}
+
+module hendecagon(radius)
+{
+  reg_polygon(11,radius);
+}
+
+module dodecagon(radius)
+{
+  reg_polygon(12,radius);
+}
+
+module ellipse(width, height) {
+  scale([1, height/width, 1]) circle(r=width/2);
+}
+
+module egg_outline(width, length){
+    union(){
+        difference(){
+            ellipse(width, 2*length-width);
+            translate([-length/2, 0, 0]) square(length);
+        }
+        circle(r=width/2);
+    }
+}
+
+//3D regular shapes
+
+module cone(height, radius, center = false) 
+{
+  cylinder(height, radius, 0, center);
+}
+
+module oval_prism(height, rx, ry, center = false) 
+{
+  scale([1, rx/ry, 1]) cylinder(h=height, r=ry, center=center);
+}
+
+module oval_tube(height, rx, ry, wall, center = false) 
+{
+  difference() {
+    scale([1, ry/rx, 1]) cylinder(h=height, r=rx, center=center);
+    translate([0,0,-height/2]) scale([(rx-wall)/rx, (ry-wall)/rx, 2]) cylinder(h=height, r=rx, center=center);
+  }
+}
+
+module cylinder_tube(height, radius, wall, center = false) 
+{
+    tubify(radius,wall)
+    cylinder(h=height, r=radius, center=center);
+}
+
+//Tubifies any regular prism
+module tubify(radius,wall)
+{
+  difference()
+  {
+    child(0);
+    translate([0, 0, -0.1]) scale([(radius-wall)/radius, (radius-wall)/radius, 2]) child(0);
+  }
+}
+
+module triangle_prism(height,radius)
+{
+  linear_extrude(height=height) triangle(radius);
+}
+
+module triangle_tube(height,radius,wall)
+{
+   tubify(radius,wall) triangle_prism(height,radius);
+}
+
+module pentagon_prism(height,radius)
+{
+  linear_extrude(height=height) pentagon(radius);
+}
+
+module pentagon_tube(height,radius,wall)
+{
+ tubify(radius,wall) pentagon_prism(height,radius);    
+}
+
+module hexagon_prism(height,radius) 
+{
+  linear_extrude(height=height) hexagon(radius);
+}
+
+module heptagon_prism(height,radius) 
+{
+  linear_extrude(height=height) heptagon(radius);
+}
+
+module octagon_prism(height,radius) 
+{
+  linear_extrude(height=height) octagon(radius);  
+}
+
+module nonagon_prism(height,radius)
+{
+  linear_extrude(height=height) nonagon(radius); 
+}
+
+module decagon_prism(height,radius)
+{
+  linear_extrude(height=height) decagon(radius); 
+}
+
+module hendecagon_prism(height,radius)
+{
+  linear_extrude(height=height) hendecagon(radius); 
+}
+
+module dodecagon_prism(height,radius)
+{
+  linear_extrude(height=height) dodecagon(radius); 
+}
+
+module torus(outerRadius, innerRadius)
+{
+  r=(outerRadius-innerRadius)/2;
+  rotate_extrude() translate([innerRadius+r,0,0]) circle(r);   
+}
+
+module triangle_pyramid(radius)
+{
+  o=radius/2;          //equivalent to radius*sin(30)
+  a=radius*sqrt(3)/2;  //equivalent to radius*cos(30)
+  polyhedron(points=[[-a,-o,-o],[a,-o,-o],[0,radius,-o],[0,0,radius]],triangles=[[0,1,2],[1,2,3],[0,1,3],[0,2,3]]);
+}
+
+module square_pyramid(base_x, base_y,height)
+{
+  w=base_x/2;
+  h=base_y/2;
+  polyhedron(points=[[-w,-h,0],[-w,h,0],[w,h,0],[w,-h,0],[0,0,height]],triangles=[[0,3,2,1], [0,1,4], [1,2,4], [2,3,4], [3,0,4]]);
+}
+
+// Tests:
+
+test_square_pyramid(){square_pyramid(10, 20, 30);}

diff --git a/scad/MCAD/screw.scad b/scad/MCAD/screw.scad
new file mode 100644 (file)
index 0000000..eb444ec
--- /dev/null
+++ b/scad/MCAD/screw.scad
@@ -0,0 +1,64 @@
+// Parametric screw-like things (ball screws, augers)
+// License: GNU LGPL 2.1 or later.
+// © 2010 by Elmo Mäntynen
+
+include <curves.scad>
+
+/* common screw parameter
+length
+pitch = length/rotations: the distance between the turns of the thread
+outside_diameter
+inner_diameter: thickness of the shaft
+*/
+
+//Uncomment to see examples
+//test_auger();
+//test_ball_groove();
+//test_ball_groove2();
+//test_ball_screw();
+
+module helix(pitch, length, slices=500){
+    rotations = length/pitch;
+    linear_extrude(height=length, center=false, convexity=10, twist=360*rotations, slices=slices, $fn=100)
+        child(0);
+}
+
+module auger(pitch, length, outside_radius, inner_radius, taper_ratio = 0.25) {
+    union(){
+        helix(pitch, length)
+        polygon(points=[[0,inner_radius],[outside_radius,(inner_radius * taper_ratio)],[outside_radius,(inner_radius * -1 * taper_ratio)],[0,(-1 * inner_radius)]], paths=[[0,1,2,3]]);
+        cylinder(h=length, r=inner_radius);
+    }
+}
+
+module test_auger(){translate([50, 0, 0]) auger(40, 80, 25, 5);}
+
+
+module ball_groove(pitch, length, diameter, ball_radius=10) {
+    helix(pitch, length, slices=100)
+        translate([diameter, 0, 0])
+        circle(r = ball_radius);
+}
+
+module test_ball_groove(){ translate([0, 300, 0]) ball_groove(100, 300, 10);}
+
+module ball_groove2(pitch, length, diameter, ball_radius, slices=200){
+    rotations = length/pitch;
+    radius=diameter/2;
+    offset = length/slices;
+    union(){
+        for (i = [0:slices]) {
+            assign (z = i*offset){
+                translate(helix_curve(pitch, radius, z)) sphere(ball_radius, $fa=5, $fs=1);
+            }
+        }
+    }
+}
+
+module test_ball_groove2(){translate([0, 0, 0]) ball_groove2(100, 300, 100, 10);}
+
+module ball_screw(pitch, length, bearing_radius=2) {
+
+}
+
+module test_ball_screw(){}

diff --git a/scad/MCAD/servos.scad b/scad/MCAD/servos.scad
new file mode 100644 (file)
index 0000000..b751835
--- /dev/null
+++ b/scad/MCAD/servos.scad
@@ -0,0 +1,108 @@
+/**
+ * Servo outline library
+ *
+ * Authors:
+ *   - Eero 'rambo' af Heurlin 2010-
+ *
+ * License: LGPL 2.1
+ */
+
+use <triangles.scad>
+
+/**
+ * Align DS420 digital servo
+ *
+ * @param vector position The position vector
+ * @param vector rotation The rotation vector
+ * @param boolean screws If defined then "screws" will be added and when the module is differenced() from something if will have holes for the screws
+ * @param number axle_lenght If defined this will draw "backgound" indicator for the main axle
+ */
+module alignds420(position, rotation, screws = 0, axle_lenght = 0)
+{
+       translate(position)
+       {
+               rotate(rotation)
+           {
+                       union()
+                       {
+                               // Main axle
+                               translate([0,0,17])
+                               {
+                                       cylinder(r=6, h=8, $fn=30);
+                                       cylinder(r=2.5, h=10.5, $fn=20);
+                               }
+                               // Box and ears
+                               translate([-6,-6,0])
+                               {
+                                       cube([12, 22.8,19.5], false);
+                                       translate([0,-5, 17])
+                                       {
+                                               cube([12, 7, 2.5]);
+                                       }
+                                       translate([0, 20.8, 17])
+                                       {
+                                               cube([12, 7, 2.5]);
+                                       }
+                               }
+                               if (screws > 0)
+                               {
+                                       translate([0,(-10.2 + 1.8),11.5])
+                                       {
+                                               # cylinder(r=1.8/2, h=6, $fn=6);
+                                       }
+                                       translate([0,(21.0 - 1.8),11.5])
+                                       {
+                                               # cylinder(r=1.8/2, h=6, $fn=6);
+                                       }
+
+                               }
+                               // The large slope
+                               translate([-6,0,19])
+                               {
+                                       rotate([90,0,90])
+                                       {
+                                               triangle(4, 18, 12);
+                                       }
+                               }
+
+                               /**
+                                * This seems to get too complex fast
+                               // Small additional axes
+                               translate([0,6,17])
+                               {
+                                       cylinder(r=2.5, h=6, $fn=10);
+                                       cylinder(r=1.25, h=8, $fn=10);
+                               }
+                               // Small slope
+                               difference()
+                               {
+                                       translate([-6,-6,19.0])
+                                       {
+                                               cube([12,6.5,4]);
+                                       }
+                                       translate([7,-7,24.0])
+                                       {
+                                               rotate([-90,0,90])
+                                               {
+                                           triangle(3, 8, 14);
+                                               }
+                                       }
+
+                               }
+                               */
+                               // So we render a cube instead of the small slope on a cube
+                               translate([-6,-6,19.0])
+                               {
+                                       cube([12,6.5,4]);
+                               }
+                       }
+                       if (axle_lenght > 0)
+                       {
+                               % cylinder(r=0.9, h=axle_lenght, center=true, $fn=8);
+                       }
+               }
+       }
+}
+
+// Tests:
+module test_alignds420(){alignds420(screws=1);}

diff --git a/scad/MCAD/shapes.scad b/scad/MCAD/shapes.scad
new file mode 100644 (file)
index 0000000..84b1810
--- /dev/null
+++ b/scad/MCAD/shapes.scad
@@ -0,0 +1,154 @@
+/*
+ *  OpenSCAD Shapes Library (www.openscad.org)
+ *  Copyright (C) 2009  Catarina Mota
+ *  Copyright (C) 2010  Elmo Mäntynen
+ *
+ *  License: LGPL 2.1 or later
+*/
+
+// 2D Shapes
+//ngon(sides, radius, center=false);
+
+// 3D Shapes
+//box(width, height, depth);
+//roundedBox(width, height, depth, factor);
+//cone(height, radius);
+//ellipticalCylinder(width, height, depth);
+//ellipsoid(width, height);
+//tube(height, radius, wall, center = false);
+//tube2(height, ID, OD, center = false);
+//ovalTube(width, height, depth, wall, center = false);
+//hexagon(height, depth);
+//octagon(height, depth);
+//dodecagon(height, depth);
+//hexagram(height, depth);
+//rightTriangle(adjacent, opposite, depth);
+//equiTriangle(side, depth);
+//12ptStar(height, depth);
+
+//----------------------
+
+// size is a vector [w, h, d]
+module box(width, height, depth) {
+  cube([width, height, depth], true);
+}
+
+// size is a vector [w, h, d]
+module roundedBox(width, height, depth, radius) {
+  size=[width, height, depth];
+  cube(size - [2*radius,0,0], true);
+  cube(size - [0,2*radius,0], true);
+  for (x = [radius-size[0]/2, -radius+size[0]/2],
+       y = [radius-size[1]/2, -radius+size[1]/2]) {
+    translate([x,y,0]) cylinder(r=radius, h=size[2], center=true);
+  }
+}
+
+module cone(height, radius, center = false) {
+  cylinder(height, radius, 0, center);
+}
+
+module ellipticalCylinder(w,h, height, center = false) {
+  scale([1, h/w, 1]) cylinder(h=height, r=w, center=center);
+}
+
+module ellipsoid(w, h, center = false) {
+  scale([1, h/w, 1]) sphere(r=w/2, center=center);
+}
+
+// wall is wall thickness
+module tube(height, radius, wall, center = false) {
+  difference() {
+    cylinder(h=height, r=radius, center=center);
+    cylinder(h=height, r=radius-wall, center=center);
+  }
+}
+
+// wall is wall thickness
+module tube2(height, ID, OD, center = false) {
+  difference() {
+    cylinder(h=height, r=OD/2, center=center);
+    cylinder(h=height, r=ID/2, center=center);
+  }
+}
+
+// wall is wall thickness
+module ovalTube(height, rx, ry, wall, center = false) {
+  difference() {
+    scale([1, ry/rx, 1]) cylinder(h=height, r=rx, center=center);
+    scale([(rx-wall)/rx, (ry-wall)/rx, 1]) cylinder(h=height, r=rx, center=center);
+  }
+}
+
+// size is the XY plane size, height in Z
+module hexagon(size, height) {
+  boxWidth = size/1.75;
+  for (r = [-60, 0, 60]) rotate([0,0,r]) cube([boxWidth, size, height], true);
+}
+
+// size is the XY plane size, height in Z
+module octagon(size, height) {
+  intersection() {
+    cube([size, size, height], true);
+    rotate([0,0,45]) cube([size, size, height], true);
+  }
+}
+
+// size is the XY plane size, height in Z
+module dodecagon(size, height) {
+  intersection() {
+    hexagon(size, height);
+    rotate([0,0,90]) hexagon(size, height);
+  }
+}
+
+// size is the XY plane size, height in Z
+module hexagram(size, height) {
+  boxWidth=size/1.75;
+  for (v = [[0,1],[0,-1],[1,-1]]) {
+    intersection() {
+      rotate([0,0,60*v[0]]) cube([size, boxWidth, height], true);
+      rotate([0,0,60*v[1]]) cube([size, boxWidth, height], true);
+    }
+  }
+}
+
+module rightTriangle(adjacent, opposite, height) {
+  difference() {
+    translate([-adjacent/2,opposite/2,0]) cube([adjacent, opposite, height], true);
+    translate([-adjacent,0,0]) {
+      rotate([0,0,atan(opposite/adjacent)]) dislocateBox(adjacent*2, opposite, height+2);
+    }
+  }
+}
+
+module equiTriangle(side, height) {
+  difference() {
+    translate([-side/2,side/2,0]) cube([side, side, height], true);
+    rotate([0,0,30]) dislocateBox(side*2, side, height);
+    translate([-side,0,0]) {
+      rotate([0,0,60]) dislocateBox(side*2, side, height);
+    }
+  }
+}
+
+module 12ptStar(size, height) {
+  starNum = 3;
+  starAngle = 360/starNum;
+  for (s = [1:starNum]) {
+    rotate([0, 0, s*starAngle]) cube([size, size, height], true);
+  }
+}
+
+//-----------------------
+//MOVES THE ROTATION AXIS OF A BOX FROM ITS CENTER TO THE BOTTOM LEFT CORNER
+module dislocateBox(w, h, d) {
+  translate([0,0,-d/2]) cube([w,h,d]);
+}
+
+//-----------------------
+// Tests
+//module test2D_ellipse(){ellipse(10, 5);}
+module test_ellipsoid(){ellipsoid(10, 5);}
+
+//module test2D_egg_outline(){egg_outline();}

diff --git a/scad/MCAD/stepper.scad b/scad/MCAD/stepper.scad
new file mode 100644 (file)
index 0000000..c19d4af
--- /dev/null
+++ b/scad/MCAD/stepper.scad
@@ -0,0 +1,313 @@
+/*
+ * A nema standard stepper motor module.
+ * 
+ * Originally by Hans Häggström, 2010.
+ * Dual licenced under Creative Commons Attribution-Share Alike 3.0 and LGPL2 or later
+ */
+
+include <units.scad>
+include <materials.scad>
+
+
+// Demo, uncomment to show:
+//nema_demo();
+
+module nema_demo(){
+    for (size = [NemaShort, NemaMedium, NemaLong]) {  
+      translate([-100,size*100,0]) motor(Nema34, size, dualAxis=true);
+      translate([0,size*100,0])    motor(Nema23, size, dualAxis=true);
+      translate([100,size*100,0])  motor(Nema17, size, dualAxis=true);
+      translate([200,size*100,0])  motor(Nema14, size, dualAxis=true);
+      translate([300,size*100,0])  motor(Nema11, size, dualAxis=true);
+      translate([400,size*100,0])  motor(Nema08, size, dualAxis=true);
+    }
+}
+
+
+// Parameters: 
+NemaModel = 0;
+NemaLengthShort = 1;
+NemaLengthMedium = 2;
+NemaLengthLong = 3;
+NemaSideSize = 4;
+NemaDistanceBetweenMountingHoles = 5;
+NemaMountingHoleDiameter = 6;
+NemaMountingHoleDepth = 7;
+NemaMountingHoleLip = 8;
+NemaMountingHoleCutoutRadius = 9;
+NemaEdgeRoundingRadius = 10;
+NemaRoundExtrusionDiameter = 11;
+NemaRoundExtrusionHeight = 12;
+NemaAxleDiameter = 13;
+NemaFrontAxleLength = 14;
+NemaBackAxleLength = 15;
+NemaAxleFlatDepth = 16;
+NemaAxleFlatLengthFront = 17;
+NemaAxleFlatLengthBack = 18;
+
+NemaA = 1;
+NemaB = 2;
+NemaC = 3;
+
+NemaShort = NemaA;
+NemaMedium = NemaB;
+NemaLong = NemaC;
+
+// TODO: The small motors seem to be a bit too long, I picked the size specs from all over the place, is there some canonical reference?
+Nema08 = [
+                [NemaModel, 8],
+                [NemaLengthShort, 33*mm],
+                [NemaLengthMedium, 43*mm],
+                [NemaLengthLong, 43*mm],
+                [NemaSideSize, 20*mm], 
+                [NemaDistanceBetweenMountingHoles, 15.4*mm], 
+                [NemaMountingHoleDiameter, 2*mm], 
+                [NemaMountingHoleDepth, 1.75*mm], 
+                [NemaMountingHoleLip, -1*mm], 
+                [NemaMountingHoleCutoutRadius, 0*mm], 
+                [NemaEdgeRoundingRadius, 2*mm], 
+                [NemaRoundExtrusionDiameter, 16*mm], 
+                [NemaRoundExtrusionHeight, 1.5*mm], 
+                [NemaAxleDiameter, 4*mm], 
+                [NemaFrontAxleLength, 13.5*mm], 
+                [NemaBackAxleLength, 9.9*mm],
+                [NemaAxleFlatDepth, -1*mm],
+                [NemaAxleFlatLengthFront, 0*mm],
+                [NemaAxleFlatLengthBack, 0*mm]
+         ];
+
+Nema11 = [
+                [NemaModel, 11],
+                [NemaLengthShort, 32*mm],
+                [NemaLengthMedium, 40*mm],
+                [NemaLengthLong, 52*mm],
+                [NemaSideSize, 28*mm], 
+                [NemaDistanceBetweenMountingHoles, 23*mm], 
+                [NemaMountingHoleDiameter, 2.5*mm], 
+                [NemaMountingHoleDepth, 2*mm], 
+                [NemaMountingHoleLip, -1*mm], 
+                [NemaMountingHoleCutoutRadius, 0*mm], 
+                [NemaEdgeRoundingRadius, 2.5*mm], 
+                [NemaRoundExtrusionDiameter, 22*mm], 
+                [NemaRoundExtrusionHeight, 1.8*mm], 
+                [NemaAxleDiameter, 5*mm], 
+                [NemaFrontAxleLength, 13.7*mm], 
+                [NemaBackAxleLength, 10*mm],
+                [NemaAxleFlatDepth, 0.5*mm],
+                [NemaAxleFlatLengthFront, 10*mm],
+                [NemaAxleFlatLengthBack, 9*mm]
+         ];
+
+Nema14 = [
+                [NemaModel, 14],
+                [NemaLengthShort, 26*mm], 
+                [NemaLengthMedium, 28*mm], 
+                [NemaLengthLong, 34*mm], 
+                [NemaSideSize, 35.3*mm], 
+                [NemaDistanceBetweenMountingHoles, 26*mm], 
+                [NemaMountingHoleDiameter, 3*mm], 
+                [NemaMountingHoleDepth, 3.5*mm], 
+                [NemaMountingHoleLip, -1*mm], 
+                [NemaMountingHoleCutoutRadius, 0*mm], 
+                [NemaEdgeRoundingRadius, 5*mm], 
+                [NemaRoundExtrusionDiameter, 22*mm], 
+                [NemaRoundExtrusionHeight, 1.9*mm], 
+                [NemaAxleDiameter, 5*mm], 
+                [NemaFrontAxleLength, 18*mm], 
+                [NemaBackAxleLength, 10*mm],
+                [NemaAxleFlatDepth, 0.5*mm],
+                [NemaAxleFlatLengthFront, 15*mm],
+                [NemaAxleFlatLengthBack, 9*mm]
+         ];
+
+Nema17 = [
+                [NemaModel, 17],
+                [NemaLengthShort, 33*mm],
+                [NemaLengthMedium, 39*mm],
+                [NemaLengthLong, 47*mm],
+                [NemaSideSize, 42.20*mm], 
+                [NemaDistanceBetweenMountingHoles, 31.04*mm], 
+                [NemaMountingHoleDiameter, 4*mm], 
+                [NemaMountingHoleDepth, 4.5*mm], 
+                [NemaMountingHoleLip, -1*mm], 
+                [NemaMountingHoleCutoutRadius, 0*mm], 
+                [NemaEdgeRoundingRadius, 7*mm], 
+                [NemaRoundExtrusionDiameter, 22*mm], 
+                [NemaRoundExtrusionHeight, 1.9*mm], 
+                [NemaAxleDiameter, 5*mm], 
+                [NemaFrontAxleLength, 18*mm], 
+                [NemaBackAxleLength, 15*mm],
+                [NemaAxleFlatDepth, 0.5*mm],
+                [NemaAxleFlatLengthFront, 15*mm],
+                [NemaAxleFlatLengthBack, 14*mm]
+         ];
+
+Nema23 = [
+                [NemaModel, 23],
+                [NemaLengthShort, 39*mm],
+                [NemaLengthMedium, 54*mm],
+                [NemaLengthLong, 76*mm],
+                [NemaSideSize, 56.4*mm], 
+                [NemaDistanceBetweenMountingHoles, 47.14*mm], 
+                [NemaMountingHoleDiameter, 4.75*mm], 
+                [NemaMountingHoleDepth, 5*mm], 
+                [NemaMountingHoleLip, 4.95*mm], 
+                [NemaMountingHoleCutoutRadius, 9.5*mm], 
+                [NemaEdgeRoundingRadius, 2.5*mm], 
+                [NemaRoundExtrusionDiameter, 38.10*mm], 
+                [NemaRoundExtrusionHeight, 1.52*mm], 
+                [NemaAxleDiameter, 6.36*mm], 
+                [NemaFrontAxleLength, 18.80*mm], 
+                [NemaBackAxleLength, 15.60*mm],
+                [NemaAxleFlatDepth, 0.5*mm],
+                [NemaAxleFlatLengthFront, 16*mm],
+                [NemaAxleFlatLengthBack, 14*mm]
+         ];
+
+Nema34 = [
+                [NemaModel, 34],
+                [NemaLengthShort, 66*mm],
+                [NemaLengthMedium, 96*mm],
+                [NemaLengthLong, 126*mm],
+                [NemaSideSize, 85*mm], 
+                [NemaDistanceBetweenMountingHoles, 69.58*mm], 
+                [NemaMountingHoleDiameter, 6.5*mm], 
+                [NemaMountingHoleDepth, 5.5*mm], 
+                [NemaMountingHoleLip, 5*mm], 
+                [NemaMountingHoleCutoutRadius, 17*mm], 
+                [NemaEdgeRoundingRadius, 3*mm], 
+                [NemaRoundExtrusionDiameter, 73.03*mm], 
+                [NemaRoundExtrusionHeight, 1.9*mm], 
+                [NemaAxleDiameter, 0.5*inch], 
+                [NemaFrontAxleLength, 37*mm], 
+                [NemaBackAxleLength, 34*mm],
+                [NemaAxleFlatDepth, 1.20*mm],
+                [NemaAxleFlatLengthFront, 25*mm],
+                [NemaAxleFlatLengthBack, 25*mm]
+         ];
+
+
+
+function motorWidth(model=Nema23) = lookup(NemaSideSize, model);
+function motorLength(model=Nema23, size=NemaMedium) = lookup(size, model);
+
+
+module motor(model=Nema23, size=NemaMedium, dualAxis=false, pos=[0,0,0], orientation = [0,0,0]) {
+
+  length = lookup(size, model);
+
+  echo(str("  Motor: Nema",lookup(NemaModel, model),", length= ",length,"mm, dual axis=",dualAxis));
+
+  stepperBlack    = BlackPaint;
+  stepperAluminum = Aluminum;
+
+  side = lookup(NemaSideSize, model);
+
+  cutR = lookup(NemaMountingHoleCutoutRadius, model);
+  lip = lookup(NemaMountingHoleLip, model);
+  holeDepth = lookup(NemaMountingHoleDepth, model);
+
+  axleLengthFront = lookup(NemaFrontAxleLength, model);
+  axleLengthBack = lookup(NemaBackAxleLength, model);
+  axleRadius = lookup(NemaAxleDiameter, model) * 0.5;
+
+  extrSize = lookup(NemaRoundExtrusionHeight, model);
+  extrRad = lookup(NemaRoundExtrusionDiameter, model) * 0.5;
+
+  holeDist = lookup(NemaDistanceBetweenMountingHoles, model) * 0.5;
+  holeRadius = lookup(NemaMountingHoleDiameter, model) * 0.5;
+
+  mid = side / 2;
+
+  roundR = lookup(NemaEdgeRoundingRadius, model);
+
+  axleFlatDepth = lookup(NemaAxleFlatDepth, model);
+  axleFlatLengthFront = lookup(NemaAxleFlatLengthFront, model);
+  axleFlatLengthBack = lookup(NemaAxleFlatLengthBack, model);
+
+  color(stepperBlack){
+    translate(pos) rotate(orientation) {
+      translate([-mid, -mid, 0]) 
+        difference() {          
+          cube(size=[side, side, length + extrSize]);
+ 
+          // Corner cutouts
+          if (lip > 0) {
+            translate([0,    0,    lip]) cylinder(h=length, r=cutR);
+            translate([side, 0,    lip]) cylinder(h=length, r=cutR);
+            translate([0,    side, lip]) cylinder(h=length, r=cutR);
+            translate([side, side, lip]) cylinder(h=length, r=cutR);
+
+          }
+
+          // Rounded edges
+          if (roundR > 0) {
+                translate([mid+mid, mid+mid, length/2])
+                  rotate([0,0,45])
+                    cube(size=[roundR, roundR*2, 4+length + extrSize+2], center=true);
+                translate([mid-(mid), mid+(mid), length/2])
+                  rotate([0,0,45])
+                    cube(size=[roundR*2, roundR, 4+length + extrSize+2], center=true);
+                translate([mid+mid, mid-mid, length/2])
+                  rotate([0,0,45])
+                    cube(size=[roundR*2, roundR, 4+length + extrSize+2], center=true);
+                translate([mid-mid, mid-mid, length/2])
+                  rotate([0,0,45])
+                    cube(size=[roundR, roundR*2, 4+length + extrSize+2], center=true);
+
+          }
+
+          // Bolt holes
+          color(stepperAluminum, $fs=holeRadius/8) {
+            translate([mid+holeDist,mid+holeDist,-1*mm]) cylinder(h=holeDepth+1*mm, r=holeRadius);
+            translate([mid-holeDist,mid+holeDist,-1*mm]) cylinder(h=holeDepth+1*mm, r=holeRadius);
+            translate([mid+holeDist,mid-holeDist,-1*mm]) cylinder(h=holeDepth+1*mm, r=holeRadius);
+            translate([mid-holeDist,mid-holeDist,-1*mm]) cylinder(h=holeDepth+1*mm, r=holeRadius);
+
+          } 
+
+          // Grinded flat
+          color(stepperAluminum) {
+            difference() {
+              translate([-1*mm, -1*mm, -extrSize]) 
+                cube(size=[side+2*mm, side+2*mm, extrSize + 1*mm]);
+              translate([side/2, side/2, -extrSize - 1*mm]) 
+                cylinder(h=4*mm, r=extrRad);
+            }
+          }
+
+        }
+
+      // Axle
+      translate([0, 0, extrSize-axleLengthFront]) color(stepperAluminum) 
+        difference() {
+                     
+          cylinder(h=axleLengthFront + 1*mm , r=axleRadius, $fs=axleRadius/10);
+
+          // Flat
+          if (axleFlatDepth > 0)
+            translate([axleRadius - axleFlatDepth,-5*mm,-extrSize*mm -(axleLengthFront-axleFlatLengthFront)] ) cube(size=[5*mm, 10*mm, axleLengthFront]);
+        }
+
+        if (dualAxis) {
+          translate([0, 0, length+extrSize]) color(stepperAluminum) 
+            difference() {
+                     
+              cylinder(h=axleLengthBack + 0*mm, r=axleRadius, $fs=axleRadius/10);
+
+              // Flat
+              if (axleFlatDepth > 0)
+                translate([axleRadius - axleFlatDepth,-5*mm,(axleLengthBack-axleFlatLengthBack)]) cube(size=[5*mm, 10*mm, axleLengthBack]);
+          }
+
+        }
+
+    }
+  }
+}
+
+module roundedBox(size, edgeRadius) {
+    cube(size);
+
+}
+

diff --git a/scad/MCAD/teardrop.scad b/scad/MCAD/teardrop.scad
new file mode 100644 (file)
index 0000000..a0578e2
--- /dev/null
+++ b/scad/MCAD/teardrop.scad
@@ -0,0 +1,44 @@
+/* From http://www.thingiverse.com/thing:3457
+   © 2010 whosawhatsis 
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*
+This script generates a teardrop shape at the appropriate angle to prevent overhangs greater than 45 degrees. The angle is in degrees, and is a rotation around the Y axis. You can then rotate around Z to point it in any direction. Rotation around X or Y will cause the angle to be wrong.
+*/
+
+module teardrop(radius, length, angle) {
+       rotate([0, angle, 0]) union() {
+               linear_extrude(height = length, center = true, convexity = radius, twist = 0)
+                       circle(r = radius, center = true, $fn = 30);
+               linear_extrude(height = length, center = true, convexity = radius, twist = 0)
+                       projection(cut = false) rotate([0, -angle, 0]) translate([0, 0, radius * sin(45) * 1.5]) cylinder(h = radius * sin(45), r1 = radius * sin(45), r2 = 0, center = true, $fn = 30);
+       }
+               
+       //I worked this portion out when a bug was causing the projection above to take FOREVER to calculate. It works as a replacement, and I figured I'd leave it here just in case.
+       /*
+               #polygon(points = [[radius * cos(-angle / 2), radius * sin(-angle / 2), 0],[radius * cos(-angle / 2), radius * -sin(-angle / 2), 0],[(sin(-angle - 45) + cos(-angle - 45)) * radius, 0, 0]], paths = [[0, 1, 2]]);
+               #polygon(points = [[radius * -cos(-angle / 2), radius * sin(-angle / 2), 0],[radius * -cos(-angle / 2), radius * -sin(-angle / 2), 0],[(sin(-angle - 45) + cos(-angle - 45)) * radius, 0, 0]], paths = [[0, 1, 2]]);
+               #polygon(points = [[radius * sin(-angle / 2), radius * cos(-angle / 2), 0],[radius * sin(-angle / 2), radius * -cos(-angle / 2), 0],[(sin(-angle - 45) + cos(-angle - 45)) * radius, 0, 0]], paths = [[0, 1, 2]]);
+       */
+}
+
+module test_teardrop(){
+    translate([0, -15, 0]) teardrop(5, 20, 90);
+    translate([0, 0, 0]) teardrop(5, 20, 60);
+    translate([0, 15, 0]) teardrop(5, 20, 45);
+}
+
+//test_teardrop();

diff --git a/scad/MCAD/test_docs.py b/scad/MCAD/test_docs.py
new file mode 100644 (file)
index 0000000..043be9a
--- /dev/null
+++ b/scad/MCAD/test_docs.py
@@ -0,0 +1,17 @@
+import py
+
+dirpath = py.path.local("./")
+
+def pytest_generate_tests(metafunc):
+    if "filename" in metafunc.funcargnames:
+        for fpath in dirpath.visit('*.scad'):
+            metafunc.addcall(funcargs=dict(filename=fpath.basename))
+        for fpath in dirpath.visit('*.py'):
+            name = fpath.basename
+            if not (name.startswith('test_') or name.startswith('_')):
+                metafunc.addcall(funcargs=dict(filename=fpath.basename))
+
+def test_README(filename):
+    README = dirpath.join('README').read()
+
+    assert filename in README

diff --git a/scad/MCAD/test_mcad.py b/scad/MCAD/test_mcad.py
new file mode 100644 (file)
index 0000000..7048842
--- /dev/null
+++ b/scad/MCAD/test_mcad.py
@@ -0,0 +1 @@
+from openscad_testing import *

diff --git a/scad/MCAD/triangles.scad b/scad/MCAD/triangles.scad
new file mode 100644 (file)
index 0000000..2482d06
--- /dev/null
+++ b/scad/MCAD/triangles.scad
@@ -0,0 +1,64 @@
+/**
+ * Simple triangles library
+ *
+ * Authors:
+ *   - Eero 'rambo' af Heurlin 2010-
+ *
+ * License: LGPL 2.1
+ */
+
+
+/**
+ * Standard right-angled triangle
+ *
+ * @param number o_len Lenght of the opposite side
+ * @param number a_len Lenght of the adjacent side
+ * @param number depth How wide/deep the triangle is in the 3rd dimension
+ * @todo a better way ?
+ */
+module triangle(o_len, a_len, depth)
+{
+    linear_extrude(height=depth)
+    {
+        polygon(points=[[0,0],[a_len,0],[0,o_len]], paths=[[0,1,2]]);
+    }
+}
+
+/**
+ * Standard right-angled triangle (tangent version)
+ *
+ * @param number angle of adjacent to hypotenuse (ie tangent)
+ * @param number a_len Lenght of the adjacent side
+ * @param number depth How wide/deep the triangle is in the 3rd dimension
+ */
+module a_triangle(tan_angle, a_len, depth)
+{
+    linear_extrude(height=depth)
+    {
+        polygon(points=[[0,0],[a_len,0],[0,tan(tan_angle) * a_len]], paths=[[0,1,2]]);
+    }
+}
+
+// Tests:
+module test_triangle() { triangle(5, 5, 5); }
+module test_a_triangle() { a_triangle(45, 5, 5); }
+module test_triangles()
+{
+    // Generate a bunch of triangles by sizes
+    for (i = [1:10])
+    {
+        translate([i*7, -30, i*7])
+        {
+            triangle(i*5, sqrt(i*5+pow(i,2)), 5);
+        }
+    }
+
+    // Generate a bunch of triangles by angle
+    for (i = [1:85/5])
+    {
+        translate([i*7, 20, i*7])
+        {
+            a_triangle(i*5, 10, 5);
+        }
+    }
+}

diff --git a/scad/MCAD/units.scad b/scad/MCAD/units.scad
new file mode 100644 (file)
index 0000000..62662a9
--- /dev/null
+++ b/scad/MCAD/units.scad
@@ -0,0 +1,24 @@
+/*
+ * Basic units.
+ * 
+ * Originally by Hans Häggström, 2010.
+ * Dual licenced under Creative Commons Attribution-Share Alike 3.0 and LGPL2 or later
+ */
+
+
+mm = 1;
+cm = 10 * mm;
+dm = 100 * mm;
+m = 1000 * mm;
+inch = 25.4 * mm;
+
+M3 = 3*mm;
+M4 = 4*mm;
+M5 = 5*mm;
+M6 = 6*mm;
+M8 = 8*mm;
+
+
+// When a small distance is needed to overlap shapes for boolean cutting, etc.
+epsilon = 0.01*mm;
+

diff --git a/scad/MCAD/utilities.scad b/scad/MCAD/utilities.scad
new file mode 100644 (file)
index 0000000..6d6468d
--- /dev/null
+++ b/scad/MCAD/utilities.scad
@@ -0,0 +1,68 @@
+/*
+ * Utility functions.
+ *
+ * Originally by Hans Häggström, 2010.
+ * Dual licenced under Creative Commons Attribution-Share Alike 3.0 and LGPL2 or later
+ */
+
+include <units.scad>
+
+function distance(a, b) = sqrt( (a[0] - b[0])*(a[0] - b[0]) +
+                                (a[1] - b[1])*(a[1] - b[1]) +
+                                (a[2] - b[2])*(a[2] - b[2]) );
+
+function length2(a) = sqrt( a[0]*a[0] + a[1]*a[1] );
+
+function normalized(a) = a / (max(distance([0,0,0], a), 0.00001));
+
+
+
+function angleOfNormalizedVector(n) = [0, -atan2(n[2], length2([n[0], n[1]])), atan2(n[1], n[0]) ];
+
+function angle(v) = angleOfNormalizedVector(normalized(v));
+
+function angleBetweenTwoPoints(a, b) = angle(normalized(b-a));
+
+// TODO check that the axis parameter works as intended
+// Duplicate everything $no of times around an $axis, for $angle/360 rounds
+module spin(no, angle=360, axis=[0, 0, 1]){
+    for (i = [0:no]){
+        rotate(normalized(axis)*angle*i/no) union(){
+            for (i = [0 : $children-1]) child(i);
+        }
+    }
+}
+ 
+
+CENTER = 0;
+LEFT = -0.5;
+RIGHT = 0.5;
+TOP = 0.5;
+BOTTOM = -0.5;
+
+FlatCap =0;
+ExtendedCap =0.5;
+CutCap =-0.5;
+
+
+module fromTo(from=[0,0,0], to=[1*m,0,0], size=[1*cm, 1*cm], align=[CENTER, CENTER], material=[0.5, 0.5, 0.5], name="", endExtras=[0,0], endCaps=[FlatCap, FlatCap], rotation=[0,0,0], printString=true) {
+
+  angle = angleBetweenTwoPoints(from, to);
+  length = distance(from, to) + endCaps[0]*size[0] + endCaps[1]*size[0] + endExtras[0] + endExtras[1];
+
+  if (length > 0) {
+    if (printString) echo(str("  " ,name, " ", size[0], "mm x ", size[1], "mm, length ",length,"mm"));
+
+    color(material)
+      translate(from)
+        rotate(angle)
+          translate( [ -endCaps[0]*size[0] - endExtras[0], size[0]*(-0.5-align[0]), size[1]*(-0.5+align[1]) ] )
+            rotate(rotation)
+              scale([length, size[0], size[1]]) child();
+  }
+}
+
+module part(name) {
+  echo("");
+  echo(str(name, ":"));
+}

diff --git a/scad/gears.scad b/scad/gears.scad
new file mode 100644 (file)
index 0000000..07df5db
--- /dev/null
+++ b/scad/gears.scad
@@ -0,0 +1,255 @@
+// OpenSCAD Herringbone Wade's Gears Script
+// (c) 2011, Christopher "ScribbleJ" Jansen
+//
+// Thanks to Greg Frost for his great "Involute Gears" script.
+//
+// Licensed under the BSD license.
+//
+// Adapted for Reprap Wilson by Martin Rice 
+//
+
+include <MCAD/involute_gears.scad> 
+
+
+// WHAT TO GENERATE?
+generate = 0;    // GENERATE BOTH GEARS FOR VIEWING
+// generate = 1;    // GENERATE STEPPER GEAR FOR PRINTING
+ generate = 2;    // GENERATE DRIVE GEAR FOR PRINTING
+
+// OPTIONS COMMON TO BOTH GEARS:
+distance_between_axels = 42;
+gear_h = 10;
+
+// for big 
+gear_shaft_h = 5;
+
+// for small
+//gear_shaft_h = 10;
+
+
+// GEAR1 (SMALLER GEAR, STEPPER GEAR) OPTIONS:
+// It's helpful to choose prime numbers for the gear teeth.
+gear1_teeth = 13;
+gear1_shaft_d = 5.25;                          // diameter of motor shaft
+gear1_shaft_r  = gear1_shaft_d/2;      
+// gear1 shaft assumed to fill entire gear.
+// gear1 attaches by means of a captive nut and bolt (or actual setscrew)
+gear1_setscrew_offset = 5;                     // Distance from motor on motor shaft.
+gear1_setscrew_d         = 3.5;                
+gear1_setscrew_r          = gear1_setscrew_d/2;
+gear1_captive_nut_d = 6.2;
+gear1_captive_nut_r  = gear1_captive_nut_d/2;
+gear1_captive_nut_h = 2.9;
+
+
+// GEAR2 (LARGER GEAR, DRIVE SHAFT GEAR) OPTIONS:
+gear2_teeth = 37;
+gear2_shaft_d = 8.5;
+gear2_shaft_r  = gear2_shaft_d/2;
+// gear2 has settable outer shaft diameter.
+gear2_shaft_outer_d = 16;
+gear2_shaft_outer_r  = gear2_shaft_outer_d/2;
+
+// gear2 has a hex bolt set in it, is either a hobbed bolt or has the nifty hobbed gear from MBI on it.
+gear2_bolt_hex_d       = 15;
+gear2_bolt_hex_r        = gear2_bolt_hex_d/2;
+// gear2_bolt_sink: How far down the gear shaft the bolt head sits; measured as distance from drive end of gear.
+gear2_bolt_sink          = 5;          
+// gear2's shaft is a bridge above the hex bolt shaft; this creates 1/3bridge_helper_h sized steps at top of shaft to help bridging.  (so bridge_helper_h/3 should be > layer height to have any effect)
+bridge_helper_h=1;
+
+gear2_rim_margin = 3;
+gear2_cut_circles  = 5;
+
+// gear2 setscrew option; not likely needed.
+gear2_setscrew_offset = 0;
+gear2_setscrew_d         = 0;
+gear2_setscrew_r          = gear2_setscrew_d/2;
+// captive nut for the setscrew
+gear2_captive_nut_d = 0;
+gear2_captive_nut_r  = gear2_captive_nut_d/2;
+gear2_captive_nut_h = 0;
+
+
+// Tolerances for geometry connections.
+AT=0.02;
+ST=AT*2;
+TT=AT/2;
+
+
+module bridge_helper()
+{
+       difference()
+       {
+               translate([0,0,-bridge_helper_h/2])
+                       cylinder(r=gear2_bolt_hex_r+TT, h=bridge_helper_h+TT,$fn=6,center=true);
+               #translate([0,0,-bridge_helper_h/2])
+                       cube([gear2_bolt_hex_d+ST, gear2_shaft_d, bridge_helper_h+AT], center=true);
+       }
+}
+
+
+
+module gearsbyteethanddistance(t1=13,t2=51, d=60, teethtwist=1, which=1)
+{
+       cp = 360*d/(t1+t2);
+
+       g1twist = 360 * teethtwist / t1 / 2;
+       g2twist = 360 * teethtwist / t2 / 2;
+
+       g1p_d  =  t1 * cp / 180;
+       g2p_d  =  t2 * cp / 180;
+       g1p_r   = g1p_d/2;
+       g2p_r   = g2p_d/2;
+
+       echo(str("Your small ", t1, "-toothed gear will be ", g1p_d, "mm across (plus 1 gear tooth size) (PR=", g1p_r,")"));
+       echo(str("Your large ", t2, "-toothed gear will be ", g2p_d, "mm across (plus 1 gear tooth size) (PR=", g2p_r,")"));
+       echo(str("Your minimum drive bolt length (to end of gear) is: ", gear2_bolt_sink+bridge_helper_h, "mm and your max is: ", gear_h+gear_shaft_h, "mm."));
+       echo(str("Your gear mount axles should be ", d,"mm (", g1p_r+g2p_r,"mm calculated) from each other."));
+       if(which == 1)
+       {
+               // GEAR 1
+               difference()
+               {
+               union()
+               {
+                       translate([0,0,(gear_h/2) - TT])
+                               gear(   twist = g1twist, 
+                                       number_of_teeth=t1, 
+                                       circular_pitch=cp, 
+                                       gear_thickness = gear_shaft_h + (gear_h/2)+AT, 
+                                       rim_thickness = (gear_h/2)+AT, 
+                                       rim_width = 0,
+                                       hub_thickness = (gear_h/2)+AT, 
+                                       hub_width = 0,
+                                       bore_diameter=0); 
+       
+                       translate([0,0,(gear_h/2) + AT])
+                       rotate([180,0,0]) 
+                               gear(   twist = -g1twist, 
+                                       number_of_teeth=t1, 
+                                       circular_pitch=cp, 
+                                       gear_thickness = (gear_h/2)+AT, 
+                                       rim_thickness = (gear_h/2)+AT, 
+                                       hub_thickness = (gear_h/2)+AT, 
+                                       bore_diameter=0); 
+               }
+                       //DIFFERENCE:
+                       //shafthole
+                       translate([0,0,-TT]) 
+                               cylinder(r=gear1_shaft_r, h=gear_h+gear_shaft_h+ST);
+
+                       //setscrew shaft
+                       translate([0,0,gear_h+gear_shaft_h-gear1_setscrew_offset])
+                               rotate([0,90,0])
+                               cylinder(r=gear1_setscrew_r, h=g1p_r);
+
+                       //setscrew captive nut
+                       translate([(g1p_r)/2, 0, gear_h+gear_shaft_h-gear1_captive_nut_r-gear1_setscrew_offset]) 
+                               translate([0,0,(gear1_captive_nut_r+gear1_setscrew_offset)/2])
+                                       #cube([gear1_captive_nut_h, gear1_captive_nut_d, gear1_captive_nut_r+gear1_setscrew_offset+ST],center=true);
+                       
+               
+               }
+       }
+       else
+       {
+         // GEAR 2
+         difference()
+         {
+               union()
+               {
+          // cylinder(h=gear_h+gear_shaft_h , r=gear2_shaft_outer_r);
+
+                       translate([0,0,(gear_h/2) - TT])
+                               gear(   twist = -g2twist, 
+                                       number_of_teeth=t2, 
+                                       circular_pitch=cp, 
+                                       gear_thickness = gear_shaft_h + (gear_h/2)+AT, 
+                                       rim_thickness = (gear_h/2)+AT, 
+                                       rim_width = gear2_rim_margin,
+                                       hub_diameter = gear2_shaft_outer_d,
+                                       hub_thickness = (gear_h/2)+AT, 
+                                       bore_diameter=0,
+                                       circles = gear2_cut_circles); 
+       
+                       translate([0,0,(gear_h/2) + AT])
+                       rotate([180,0,0]) 
+                               gear(   twist = g2twist, 
+                                       number_of_teeth=t2, 
+                                       circular_pitch=cp, 
+                                       gear_thickness = (gear_h/2)+AT, 
+                                       rim_thickness = (gear_h/2)+AT, 
+                                       rim_width = gear2_rim_margin,
+                                       hub_diameter = gear2_shaft_outer_d,
+                                       hub_thickness = (gear_h/2)+AT, 
+                                       bore_diameter=0,
+                                       circles = gear2_cut_circles); 
+               }
+
+                       //DIFFERENCE:
+                       //shafthole
+                       translate([0,0,-TT]) 
+                               cylinder(r=gear2_shaft_r, h=gear_h+gear_shaft_h+ST);
+
+                       //setscrew shaft
+if(0) {
+                       translate([0,0,gear_h+gear_shaft_h-gear2_setscrew_offset])
+                               rotate([0,90,0])
+                               cylinder(r=gear2_setscrew_r, h=gear2_shaft_outer_d);
+
+                       //setscrew captive nut
+                       translate([(gear2_shaft_outer_d)/2, 0, gear_h+gear_shaft_h-gear2_captive_nut_r-gear2_setscrew_offset]) 
+                               translate([0,0,(gear2_captive_nut_r+gear2_setscrew_offset)/2])
+                                       #cube([gear2_captive_nut_h, gear2_captive_nut_d, gear2_captive_nut_r+gear2_setscrew_offset+ST],center=true);
+}
+
+                       //trim shaft
+                       difference()
+                       {
+                               translate([0,0,gear_h+AT])                      cylinder(h=gear_shaft_h+ST, r=g2p_r);
+                               #translate([0,0,gear_h])                             cylinder(h=gear_shaft_h , r=gear2_shaft_outer_r);
+                       }
+
+                       //hex bolt shaft
+                       translate([0,0,-TT]) cylinder(r=gear2_bolt_hex_r, h=gear2_bolt_sink+AT,$fn=6);
+
+               }
+
+if(1) translate([0,0,1]) {
+               // hex bolt shaft bridge aid.
+               #translate([0,0,gear2_bolt_sink]) //gear_h+gear_shaft_h-gear2_bolt_sink])
+                       bridge_helper();
+               #translate([0,0,gear2_bolt_sink-bridge_helper_h/3]) //gear_h+gear_shaft_h-gear2_bolt_sink+bridge_helper_h/3])
+                       rotate([0,0,60]) bridge_helper();
+               #translate([0,0,gear2_bolt_sink-(bridge_helper_h/3*2)]) //gear_h+gear_shaft_h-gear2_bolt_sink+((bridge_helper_h/3)*2)])
+                       rotate([0,0,-60]) bridge_helper();
+       }
+       }
+       
+}
+
+
+t1 = gear1_teeth;
+t2 = gear2_teeth;
+cp = 360*distance_between_axels/(t1+t2);
+g1p_d  =  t1 * cp / 180;
+g2p_d  =  t2 * cp / 180;
+g1p_r   = g1p_d/2;
+g2p_r   = g2p_d/2;
+
+if(generate == 1)
+{
+       gearsbyteethanddistance(t1 = gear1_teeth, t2=gear2_teeth, d=distance_between_axels, which=1);
+}
+else if(generate == 2)
+{
+       gearsbyteethanddistance(t1 = gear1_teeth, t2=gear2_teeth, d=distance_between_axels, which=2);
+}
+else
+{
+
+       translate([-g1p_r,0,0]) rotate([0,0,($t*360/gear1_teeth)]) gearsbyteethanddistance(t1 = gear1_teeth, t2=gear2_teeth, d=distance_between_axels, which=1);
+       translate([g2p_r,0,0])  rotate([0,0,($t*360/gear2_teeth)*-1]) gearsbyteethanddistance(t1 = gear1_teeth, t2=gear2_teeth, d=distance_between_axels, which=2);
+}
+

diff --git a/stl/atx-holder.stl b/stl/atx-holder.stl
new file mode 100644 (file)
index 0000000..914b607
Binary files /dev/null and b/stl/atx-holder.stl differ

diff --git a/stl/extruder/X-CARRIAGE.stl b/stl/extruder/X-CARRIAGE.stl
deleted file mode 100644 (file)
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--- a/stl/extruder/X-CARRIAGE.stl
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-endsolid CATIA STL\r