Commit | Line | Data |
---|---|---|
28ef71df CE |
1 | // Threads for acorn model |
2 | // Copyright (c) 2017 Clinton Ebadi <clinton@unknownlamer.org> | |
3 | ||
0cbf5490 | 4 | use <screw_threads.scad> // http://www.thingiverse.com/thing:1686322 |
28ef71df | 5 | |
244fc8f0 | 6 | AUTO_CALCULATE = -1; |
28ef71df | 7 | |
0cbf5490 CE |
8 | internal_thread_tolerance = 0.3; |
9 | external_thread_tolerance = 0.2; | |
10 | thread_angle = 50; | |
28ef71df | 11 | |
244fc8f0 CE |
12 | module acorn (thread_pitch = 3.0, |
13 | thread_size = 2.5, | |
14 | thread_height = 3.5, | |
15 | thread_tooth_height = AUTO_CALCULATE, | |
28ef71df | 16 | |
244fc8f0 CE |
17 | inner_d = 24.5, |
18 | base_height = AUTO_CALCULATE, | |
19 | wall_thickness = AUTO_CALCULATE, | |
20 | outer_d = AUTO_CALCULATE, | |
28ef71df | 21 | |
244fc8f0 CE |
22 | keychain = true) { |
23 | ||
24 | // derived settings | |
25 | wall_thickness = (wall_thickness == AUTO_CALCULATE) ? thread_size : wall_thickness; | |
26 | outer_d = (outer_d == AUTO_CALCULATE) ? inner_d + wall_thickness*2 : outer_d; | |
27 | thread_tooth_height = (thread_tooth_height == AUTO_CALCULATE) ? ((thread_pitch - 0.4 > 0) ? thread_pitch - 0.4 : thread_pitch) : thread_tooth_height; | |
28 | base_height = (base_height == AUTO_CALCULATE) ? inner_d : base_height; | |
29 | ||
30 | ||
31 | module acorn_thread (outer_d = outer_d, internal = false, ring = true) { | |
32 | if (internal) { | |
33 | outer_ring_d = outer_d+max(thread_size, wall_thickness)+1; | |
34 | echo ("outer ring = ", outer_ring_d); | |
35 | ScrewHole (outer_diam=outer_d, height = thread_height, pitch = thread_pitch, tooth_height = thread_tooth_height, tooth_angle = thread_angle, tolerance=internal_thread_tolerance) { | |
36 | if (ring) cylinder (d = outer_ring_d, h = thread_height); | |
37 | } | |
28ef71df | 38 | } |
28ef71df | 39 | |
244fc8f0 CE |
40 | if (!internal) { |
41 | difference () { | |
42 | ScrewThread (outer_diam=outer_d, height = thread_height, pitch = thread_pitch, tooth_height = thread_tooth_height, tooth_angle = thread_angle, tolerance=external_thread_tolerance); | |
43 | cylinder (d = outer_d-wall_thickness-thread_size-0.01, h = thread_height * 4, center=true); | |
44 | } | |
28ef71df CE |
45 | } |
46 | } | |
28ef71df | 47 | |
244fc8f0 CE |
48 | module nut_body (h = base_height, d = outer_d, nub = false) { |
49 | translate ([0 ,0, h]) { | |
50 | intersection () { | |
51 | union () { | |
52 | resize ([d, d, h*2]) sphere (d=h*2); | |
53 | if (nub) { | |
54 | translate ([0, d/2-wall_thickness/2, -thread_height]) sphere (d=wall_thickness*2, $fs = 0.1); | |
55 | } | |
0cbf5490 | 56 | } |
244fc8f0 | 57 | translate ([0 ,0, -h/2]) cube ([d*2, d*2, h], center=true); |
0cbf5490 | 58 | } |
0cbf5490 | 59 | } |
28ef71df | 60 | } |
28ef71df | 61 | |
244fc8f0 CE |
62 | module nut () { |
63 | difference () { | |
64 | nut_body (); | |
65 | translate ([0, 0, wall_thickness + 0.01]) nut_body (d=outer_d-wall_thickness*2, nub=false); | |
66 | } | |
28ef71df | 67 | |
244fc8f0 CE |
68 | translate ([0, 0, base_height-0.1]) acorn_thread (outer_d = outer_d); |
69 | } | |
28ef71df | 70 | |
28ef71df | 71 | |
244fc8f0 CE |
72 | module cap_keychain_holes (hole_d=3, spacing=15 /*12*/) { |
73 | h=100; | |
74 | translate ([-spacing/2, 0, 0]) cylinder (d=hole_d, h=h, $fs=0.1); | |
75 | translate ([spacing/2, 0, 0]) cylinder (d=hole_d, h=h, $fs=0.1); | |
76 | } | |
28ef71df | 77 | |
244fc8f0 CE |
78 | module cap () { |
79 | scale_f = outer_d / 171; | |
80 | difference () { | |
81 | scale ([scale_f, scale_f, scale_f]) { | |
82 | difference () { | |
83 | union () { | |
84 | translate ([0, 0, -1]) import ("Acorn_Unthreaded/cap_reduced.stl"); | |
85 | echo ("h = ", thread_height/scale_f); | |
86 | cylinder (d = 180, h=thread_height/scale_f); | |
87 | } | |
88 | translate ([0, 0, -0.51]) cube ([200, 200, 1], center=true); | |
0cbf5490 | 89 | } |
0cbf5490 | 90 | } |
244fc8f0 CE |
91 | if (keychain) cap_keychain_holes (); |
92 | acorn_thread (internal = true, ring = false); | |
0cbf5490 | 93 | } |
0cbf5490 | 94 | } |
28ef71df | 95 | |
244fc8f0 CE |
96 | module gasket (gasket_height=0.9) { |
97 | cylinder (d = outer_d, h = gasket_height, center=true); | |
28ef71df CE |
98 | } |
99 | ||
244fc8f0 CE |
100 | module nuts () { |
101 | translate ([outer_d+10, 0, 0,]) nut (); | |
102 | cap (); | |
103 | translate ([-(outer_d+10), 0, 0,]) gasket (); | |
104 | } | |
28ef71df | 105 | |
244fc8f0 | 106 | nuts (); |
28ef71df | 107 | } |
244fc8f0 CE |
108 | |
109 | $fs = 1; | |
110 | $fa = 1; | |
111 | ||
112 | acorn (); |