-// Threads for acorn model
-// Copyright (c) 2017 Clinton Ebadi <clinton@unknownlamer.org>
-
-use <screw_threads.scad> // http://www.thingiverse.com/thing:1686322
-
-thread_pitch = 3.0;
-thread_size = 2.5; //2.2; // 3.0
-thread_tooth_height = thread_pitch - 0.4;
-thread_height = 3.5; //4.0;
-wall_thickness = thread_size;
-base_height = 25;
-inner_d = 24.5;
-outer_d = inner_d + wall_thickness*2; //33;
-
-internal_thread_tolerance = 0.3;
-external_thread_tolerance = 0.2;
-thread_angle = 50;
-
-
-module acorn_thread (outer_d = outer_d, internal = false, ring = true) {
- outer_d = outer_d;
-
- if (internal) {
- outer_ring_d = outer_d+max(thread_size, wall_thickness)+1;
- echo ("outer ring = ", outer_ring_d);
- ScrewHole (outer_diam=outer_d, height = thread_height, pitch = thread_pitch, tooth_height = thread_tooth_height, tooth_angle = thread_angle, tolerance=internal_thread_tolerance) {
- if (ring) cylinder (d = outer_ring_d, h = thread_height);
- }
- }
-
- if (!internal) {
- difference () {
- ScrewThread (outer_diam=outer_d, height = thread_height, pitch = thread_pitch, tooth_height = thread_tooth_height, tooth_angle = thread_angle, tolerance=external_thread_tolerance);
- cylinder (d = outer_d-wall_thickness-thread_size-0.01, h = thread_height * 4, center=true);
- }
- }
-}
-
-
-module nut_body (h = base_height, d = outer_d, nub = true) {
- translate ([0 ,0, h]) {
- intersection () {
- union () {
- resize ([d, d, h*2]) sphere (d=h*2);
- if (nub) {
- translate ([0, d/2-wall_thickness/2, -thread_height]) sphere (d=wall_thickness*2, $fs = 0.1);
- }
- }
- translate ([0 ,0, -h/2]) cube ([d*2, d*2, h], center=true);
- }
- }
-}
-
-module nut () {
- difference () {
- nut_body ();
- translate ([0, 0, wall_thickness + 0.01]) nut_body (d=outer_d-wall_thickness*2, nub=false);
- }
-
- translate ([0, 0, base_height-0.1]) acorn_thread (outer_d = outer_d);
-}
-
-
-
-$fs = 1;
-$fa = 1;
-
-module cap_keychain (hole_d=3, spacing=15 /*12*/) {
- h=100;
- translate ([-spacing/2, 0, 0]) cylinder (d=hole_d, h=h, $fs=0.1);
- translate ([spacing/2, 0, 0]) cylinder (d=hole_d, h=h, $fs=0.1);
-}
-
-module cap () {
- scale_f = outer_d / 171;
- difference () {
- scale ([scale_f, scale_f, scale_f]) {
- difference () {
- union () {
- translate ([0, 0, -1]) import ("Acorn_Unthreaded/cap_reduced.stl");
- echo ("h = ", thread_height/scale_f);
- cylinder (d = 180, h=thread_height/scale_f);
- }
- translate ([0, 0, -0.51]) cube ([200, 200, 1], center=true);
- }
- }
- cap_keychain ();
- acorn_thread (internal = true, ring = false);
- }
-}
-
-module gasket (gasket_height=0.9) {
- cylinder (d = outer_d, h = gasket_height, center=true);
-}
-
-module nuts () {
-//translate ([outer_d+10, 0, 0,]) nut ();
-//cap ();
-translate ([-(outer_d+10), 0, 0,]) gasket ();
-}
-
-nuts ();
-
-module print_test () {
- translate ([outer_d+thread_size+5, 0, thread_height]) rotate ([180, 0, 0]) acorn_thread (outer_d = outer_d, internal=true);
- translate ([0, 0, thread_height]) rotate ([180, 0, 0]) union () {
- translate ([0, 0, 0]) cylinder (d=outer_d-wall_thickness, h=thread_height);
- translate ([0, 0, -thread_height*3]) cylinder (d=outer_d/3, h=thread_height*3);
- acorn_thread (outer_d = outer_d);
- }
-
-
-}
+// Threads for acorn model
+// Copyright (c) 2017 Clinton Ebadi <clinton@unknownlamer.org>
+
+use <screw_threads.scad> // http://www.thingiverse.com/thing:1686322
+
+AUTO_CALCULATE = -1;
+
+acorn_parts = [ "body", "cap", "gasket" ];
+
+internal_thread_tolerance = 0.3;
+external_thread_tolerance = 0.2;
+thread_angle = 50;
+
+
+function contains (x, lst) = len([ for (i = lst) if (x == i) i]) > 0;
+
+// dome module from https://github.com/Sembiance/common/blob/master/openscad/dome.scad, Public Domain
+module dome(d=5, h=2, hollow=false, wallWidth=0.5) {
+ sphereRadius = (pow(h, 2) + pow((d/2), 2) ) / (2*h);
+ translate([0, 0, (sphereRadius-h)*-1]) {
+ difference() {
+ sphere(sphereRadius);
+ translate([0, 0, -h]) cube([2*sphereRadius, 2*sphereRadius, 2*sphereRadius], center=true);
+ if(hollow) sphere(sphereRadius-wallWidth);
+ }
+ }
+}
+
+module acorn (thread_pitch = 3.0,
+ thread_size = 2.5,
+ thread_height = 3.5,
+ thread_tooth_height = AUTO_CALCULATE,
+
+ inner_d = 24.5,
+ base_height = AUTO_CALCULATE,
+ wall_thickness = AUTO_CALCULATE,
+ outer_d = AUTO_CALCULATE,
+
+ keychain = true) {
+
+ // derived settings
+ wall_thickness = (wall_thickness == AUTO_CALCULATE) ? thread_size : wall_thickness;
+ outer_d = (outer_d == AUTO_CALCULATE) ? inner_d + wall_thickness*2 : outer_d;
+ thread_tooth_height = (thread_tooth_height == AUTO_CALCULATE) ? ((thread_pitch - 0.4 > 0) ? thread_pitch - 0.4 : thread_pitch) : thread_tooth_height;
+ base_height = (base_height == AUTO_CALCULATE) ? inner_d : base_height;
+
+ echo ("outer_d = ", outer_d);
+
+
+ module acorn_thread (outer_d = outer_d, internal = false, ring = true) {
+ if (internal) {
+ outer_ring_d = outer_d+max(thread_size, wall_thickness)+1;
+ echo ("outer ring = ", outer_ring_d);
+ ScrewHole (outer_diam=outer_d, height = thread_height, pitch = thread_pitch, tooth_height = thread_tooth_height, tooth_angle = thread_angle, tolerance=internal_thread_tolerance) {
+ if (ring) cylinder (d = outer_ring_d, h = thread_height);
+ }
+ }
+
+ if (!internal) {
+ difference () {
+ ScrewThread (outer_diam=outer_d, height = thread_height, pitch = thread_pitch, tooth_height = thread_tooth_height, tooth_angle = thread_angle, tolerance=external_thread_tolerance);
+ cylinder (d = outer_d-wall_thickness-thread_size-0.01, h = thread_height * 4, center=true);
+ }
+ }
+ }
+
+ module nut_body (h = base_height, d = outer_d, nub = false) {
+ translate ([0 ,0, h]) {
+ intersection () {
+ union () {
+ resize ([d, d, h*2]) sphere (d=h*2);
+ if (nub) {
+ translate ([0, d/2-wall_thickness/2, -thread_height]) sphere (d=wall_thickness*2, $fs = 0.1);
+ }
+ }
+ translate ([0 ,0, -h/2]) cube ([d*2, d*2, h], center=true);
+ }
+ }
+ }
+
+ module nut () {
+ difference () {
+ nut_body ();
+ translate ([0, 0, wall_thickness + 0.01]) nut_body (d=outer_d-wall_thickness*2, nub=false);
+ }
+
+ translate ([0, 0, base_height-0.1]) acorn_thread (outer_d = outer_d);
+ }
+
+
+ module cap_keychain_holes (hole_d=3, spacing=12) {
+ h=100;
+ translate ([-spacing/2, 0, 0]) cylinder (d=hole_d, h=h, $fs=0.1);
+ translate ([spacing/2, 0, 0]) cylinder (d=hole_d, h=h, $fs=0.1);
+ }
+
+ module cap (model="3D/RaleighAcorn_Filled_simple.stl", native_d = 168) {
+ scale_f = outer_d / native_d; //168;
+ echo ("scale_f = ", scale_f);
+ difference () {
+ scale ([scale_f, scale_f, scale_f]) {
+ difference () {
+ union () {
+ translate ([0, 0, -1]) import (model);
+ echo ("h = ", thread_height/scale_f);
+ }
+ // todo: only makes sense for RaleighAcorn, fix in original model...
+ translate ([0, 0, -0.51]) cube ([200, 200, 1], center=true);
+ }
+ }
+ if (keychain) cap_keychain_holes ();
+
+ // hollow it out (make parametric later, this is pretty ugly now, but calc seems to be ok for RaleighAcorn)
+ diam_to_height_ratio = 3.2;
+ dome_h = outer_d / diam_to_height_ratio - thread_height;
+ echo ("dome_h = ", dome_h);
+ difference () {
+ translate ([0, 0, thread_height-0.01]) dome (d=outer_d, h=dome_h);
+ }
+
+
+ translate ([0, 0, -0.01]) acorn_thread (internal = true, ring = false);
+ }
+ }
+
+ module gasket (gasket_height=0.9) {
+ cylinder (d = outer_d, h = gasket_height, center=true);
+ }
+
+ module nuts () {
+ if (contains ("body", acorn_parts))
+ translate ([outer_d+10, 0, 0,]) nut ();
+ if (contains ("cap", acorn_parts))
+ cap (native_d=167);//model="3D/RaleighAcorn_ExaggeratedCap_Decimated.stl", native_d = 178);
+ if (contains ("gasket", acorn_parts))
+ translate ([-(outer_d+10), 0, 0,]) gasket ();
+ }
+
+ nuts ();
+}
+
+//$fs = 1;
+//$fa = 1;
+
+acorn_parts = [ "cap"];
+
+//acorn ();
+huge_acorn ();
+
+module huge_acorn () {
+ acorn (inner_d=100, base_height=80,
+ thread_size=4, thread_pitch=4, thread_height=8,
+ keychain=false);
+}
HCoop / clinton / 3d-models.git / blobdiff