1 // Threads for acorn model
2 // Copyright (c) 2017 Clinton Ebadi <clinton@unknownlamer.org>
4 use <screw_threads.scad> // http://www.thingiverse.com/thing:1686322
7 thread_size = 2.5; //2.2; // 3.0
8 thread_tooth_height = thread_pitch - 0.4;
9 thread_height = 3.5; //4.0;
10 wall_thickness = thread_size;
13 outer_d = inner_d + wall_thickness*2; //33;
15 internal_thread_tolerance = 0.3;
16 external_thread_tolerance = 0.2;
20 module acorn_thread (outer_d = outer_d, internal = false, ring = true) {
24 outer_ring_d = outer_d+max(thread_size, wall_thickness)+1;
25 echo ("outer ring = ", outer_ring_d);
26 ScrewHole (outer_diam=outer_d, height = thread_height, pitch = thread_pitch, tooth_height = thread_tooth_height, tooth_angle = thread_angle, tolerance=internal_thread_tolerance) {
27 if (ring) cylinder (d = outer_ring_d, h = thread_height);
33 ScrewThread (outer_diam=outer_d, height = thread_height, pitch = thread_pitch, tooth_height = thread_tooth_height, tooth_angle = thread_angle, tolerance=external_thread_tolerance);
34 cylinder (d = outer_d-wall_thickness-thread_size-0.01, h = thread_height * 4, center=true);
40 module nut_body (h = base_height, d = outer_d, nub = true) {
41 translate ([0 ,0, h]) {
44 resize ([d, d, h*2]) sphere (d=h*2);
46 translate ([0, d/2-wall_thickness/2, -thread_height]) sphere (d=wall_thickness*2, $fs = 0.1);
49 translate ([0 ,0, -h/2]) cube ([d*2, d*2, h], center=true);
57 translate ([0, 0, wall_thickness + 0.01]) nut_body (d=outer_d-wall_thickness*2, nub=false);
60 translate ([0, 0, base_height-0.1]) acorn_thread (outer_d = outer_d);
68 module cap_keychain (hole_d=3, spacing=15 /*12*/) {
70 translate ([-spacing/2, 0, 0]) cylinder (d=hole_d, h=h, $fs=0.1);
71 translate ([spacing/2, 0, 0]) cylinder (d=hole_d, h=h, $fs=0.1);
75 scale_f = outer_d / 171;
77 scale ([scale_f, scale_f, scale_f]) {
80 translate ([0, 0, -1]) import ("Acorn_Unthreaded/cap_reduced.stl");
81 echo ("h = ", thread_height/scale_f);
82 cylinder (d = 180, h=thread_height/scale_f);
84 translate ([0, 0, -0.51]) cube ([200, 200, 1], center=true);
88 acorn_thread (internal = true, ring = false);
92 module gasket (gasket_height=0.9) {
93 cylinder (d = outer_d, h = gasket_height, center=true);
97 //translate ([outer_d+10, 0, 0,]) nut ();
99 translate ([-(outer_d+10), 0, 0,]) gasket ();
104 module print_test () {
105 translate ([outer_d+thread_size+5, 0, thread_height]) rotate ([180, 0, 0]) acorn_thread (outer_d = outer_d, internal=true);
106 translate ([0, 0, thread_height]) rotate ([180, 0, 0]) union () {
107 translate ([0, 0, 0]) cylinder (d=outer_d-wall_thickness, h=thread_height);
108 translate ([0, 0, -thread_height*3]) cylinder (d=outer_d/3, h=thread_height*3);
109 acorn_thread (outer_d = outer_d);