X-Git-Url: http://git.hcoop.net/clinton/prusa3.git/blobdiff_plain/57e62ab3303d6ab88915a52026a34037f809b94a..8ac34a2a68ebe8a501242a740a4f3c419cbf5993:/box_frame/inc/functions.scad

diff --git a/box_frame/inc/functions.scad b/box_frame/inc/functions.scad
index 2853005..bdf217f 100644
--- a/box_frame/inc/functions.scad
+++ b/box_frame/inc/functions.scad
@@ -5,7 +5,7 @@
 // Václav 'ax' Hůla <axtheb@gmail.com>
 // Vlnofka <>
 // http://www.reprap.org/wiki/Prusa_Mendel
-// http://github.com/prusajr/PrusaMendel
+// http://github.com/josefprusa/Prusa3
 
 
 module nut(d,h,horizontal=true){
@@ -18,30 +18,22 @@ module nut(d,h,horizontal=true){
     }
 }
 
-// Based on nophead research
-module polyhole(d, h, center=false) {
-    n = max(round(2 * d),3);
-    rotate([0,0,180])
-        cylinder(h = h, r = (d / 2) / cos (180 / n), $fn = n);
-}
-
-// make it interchangeable between this and cylinder
-module cylinder_poly(r, h, center=false){
-    polyhole(d=r*2, h=h, center=center);
-}
-
 module fillet(radius, height=100, $fn=0) {
     //this creates acutal fillet
-    translate([-radius, -radius, -height/2-0.01])
-        difference() {
-            cube([radius*2, radius*2, height+0.02]);
-            cylinder(r=radius, h=height+0.02, $fn=$fn);
+    translate([-radius, -radius, -height / 2 - 0.02]) difference() {
+        cube([radius * 2, radius * 2, height + 0.04]);
+        if ($fn == 0 && (radius == 2 || radius == 3 || radius == 4)) {
+            cylinder(r=radius, h=height + 0.04, $fn=4 * radius);
+        } else {
+            cylinder(r=radius, h=height + 0.04, $fn=$fn);
         }
+
+    }
 }
 
 module cube_fillet(size, radius=-1, vertical=[3,3,3,3], top=[0,0,0,0], bottom=[0,0,0,0], center=false, $fn=0){
     //
-    if (use_fillets) {
+    if (use_fillets == 1) {
         if (center) {
             cube_fillet_inside(size, radius, vertical, top, bottom, $fn);
         } else {
@@ -49,7 +41,17 @@ module cube_fillet(size, radius=-1, vertical=[3,3,3,3], top=[0,0,0,0], bottom=[0
                 cube_fillet_inside(size, radius, vertical, top, bottom, $fn);
         }
     } else {
-        cube(size, center);
+        if (use_fillets == 2) {
+            if (center) {
+                cube_fillet_inside(size, radius, vertical, top, bottom, 4);
+            } else {
+                translate([size[0]/2, size[1]/2, size[2]/2])
+                    cube_fillet_inside(size, radius, vertical, top, bottom, 4);
+            }
+
+        } else {
+            cube(size, center);
+        }
     }
 
 }
@@ -110,7 +112,7 @@ module nema17(places=[1,1,1,1], size=15.5, h=10, holes=false, shadow=false, $fn=
     }
 }
 
-module screw(h=20, r=2, r_head=3.5, head_drop=0, slant=true, poly=false, $fn=0){
+module screw(h=20, r=2, r_head=3.5, head_drop=0, slant=i_am_box, poly=false, $fn=0){
     //makes screw with head
     //for substraction as screw hole
     if (poly) {
@@ -127,5 +129,46 @@ module screw(h=20, r=2, r_head=3.5, head_drop=0, slant=true, poly=false, $fn=0){
     }
 }
 
-//cube_fillet([10,20,30], vertical=[3,2,0,0], top=[3,2,0,5], bottom=[3,2,0,5]);
-//cube_fillet([10,20,30], radius=2, top=[7,2,7,2]);
+module plate_screw(long=0) {
+    if (i_am_box == 0) {
+        translate([0, 0, -long]) screw(head_drop=14 + long, h=30 + long, r_head=3.6, r=1.7, $fn=24, slant=false);
+    } else {
+        translate([0, 0, -2 - long]) screw(head_drop=14 + long, h=30 + long, r_head=4.5, r=2, $fn=24, slant=true);
+    }
+}
+
+//radius of the idler assembly (to surface that touches belt, ignoring guide walls)
+function idler_assy_r_inner(idler_bearing) = (idler_bearing[0] / 2) + (6 * single_wall_width + 0.2) * idler_bearing[3];
+//outer radius of the idler assembly (to smooth side of belt) 
+function idler_assy_r_outer(idler_bearing) = idler_assy_r_inner(idler_bearing) + belt_thickness + 1;
+
+
+module idler_assy(idler_bearing = [22, 7, 8, 1]) {
+
+    //bearing axle
+    translate([0,0,-1]) cylinder(h = 120, r=(idler_bearing[2] + 1) / 2, $fn=small_hole_segments, center=true);
+    //bearing shadow
+    %cylinder(h = idler_bearing[1], r=idler_bearing[0]/2, center=true);
+    //belt shadow
+    %cylinder(h = belt_width, r=idler_assy_r_outer(idler_bearing), center=true);
+
+    cylinder(h = idler_width + 1, r=idler_assy_r_outer(idler_bearing) + 0.5, center=true);
+}
+
+module belt(len, side = 0){
+    //belt. To be substracted from model
+    //len is in +Z, smooth side in +X, Y centered
+    translate([-0.5, 0, 0]) maketeeth(len);
+    translate([0, -4.5, -0.01]) cube([belt_thickness, 9, len + 0.02]);
+    if (side != 0) {
+    translate([0, -4.5 + side, -0.01]) cube_fillet([belt_thickness, 9, len + 0.02], vertical = [3, 0, 0, 0]);
+    }
+}
+
+
+module maketeeth(len){
+    //Belt teeth. 
+    for (i = [0 : len / belt_tooth_distance]) {
+        translate([0, 0, i * belt_tooth_distance]) cube([2, 9, belt_tooth_distance * belt_tooth_ratio], center = true);
+    }
+}