818dd661 |
1 | /* GNU AGPLv3 (or later at your option) |
2 | see bottom for more license info */ |
3 | |
4 | /* spin thing that erin likes */ |
0c7b5029 |
5 | $fn = 75; |
cc410ed6 |
6 | |
5f8325d2 |
7 | layer_height = 0.35; |
818dd661 |
8 | |
9 | weight = "penny"; |
10 | // weight = "608zz"; |
0c7b5029 |
11 | |
a8c6c94f |
12 | //bearing = "608zz"; |
13 | bearing = "sr188"; |
0c7b5029 |
14 | // bearing = "625rs"; |
15 | |
cc410ed6 |
16 | weight_lip_overhang = 0.3; |
17 | bearing_lip_overhang = weight_lip_overhang; |
cc410ed6 |
18 | wall = 3; |
2645ef26 |
19 | penny_thickness = 1.52; |
818dd661 |
20 | penny_radius = 19.05 / 2; |
7f1519fb |
21 | |
a8c6c94f |
22 | sr188_radius = 12.74 / 2; // 0.5 / 2 |
23 | sr188_inner_radius = 6.3 / 2; // 0.2470 / 2 |
24 | sr188_thickness = 4.8; // 0.1895 inch |
25 | sr188_cover_radius = sr188_radius; |
26 | sr188_cap_footprint_radius = 12 / 2; |
27 | |
7f1519fb |
28 | _608zz_radius = 22 / 2; |
29 | _608zz_inner_radius = 8.1 / 2; |
8d55712b |
30 | _608zz_cover_radius = _608zz_radius; |
7f1519fb |
31 | _608zz_cap_footprint_radius = 12 / 2; |
32 | _608zz_thickness = 7; |
33 | |
0c7b5029 |
34 | _625rs_radius = 16 / 2; |
35 | _625rs_inner_radius = 5 / 2; |
36 | _625rs_thickness = 5; |
37 | _625rs_cover_radius = _625rs_radius; |
38 | _625rs_cap_footprint_radius = _625rs_inner_radius + 1; |
39 | |
818dd661 |
40 | weight_radius = (weight == "penny") ? penny_radius : _608zz_radius; |
2645ef26 |
41 | weight_thickness = (weight == "penny") ? |
42 | penny_thickness * 5 : _608zz_thickness; |
7f1519fb |
43 | |
0c7b5029 |
44 | bearing_radius = |
45 | (bearing == "608zz") ? _608zz_radius |
46 | : (bearing == "625rs") ? _625rs_radius |
a8c6c94f |
47 | : (bearing == "sr188") ? sr188_radius |
0c7b5029 |
48 | : 1/0; |
3381230e |
49 | bearing_window_radius = bearing_radius - bearing_lip_overhang - 1; |
0c7b5029 |
50 | bearing_inner_radius = |
51 | (bearing == "608zz") ? _608zz_inner_radius |
04db4766 |
52 | : (bearing == "625rs") ? _625rs_inner_radius |
a8c6c94f |
53 | : (bearing == "sr188") ? sr188_inner_radius |
0c7b5029 |
54 | : 1/0; |
55 | bearing_cover_radius = |
56 | (bearing == "608zz") ? _608zz_cover_radius |
57 | : (bearing == "625rs") ? _625rs_cover_radius |
a8c6c94f |
58 | : (bearing == "sr188") ? sr188_cover_radius |
0c7b5029 |
59 | : 1/0; |
7f1519fb |
60 | bearing_cap_footprint_radius = |
0c7b5029 |
61 | (bearing == "608zz") ? _608zz_cap_footprint_radius |
62 | : (bearing == "625rs" ) ? _625rs_cap_footprint_radius |
a8c6c94f |
63 | : (bearing == "sr188" ) ? sr188_cap_footprint_radius |
0c7b5029 |
64 | : 1/0; |
65 | bearing_thickness = |
66 | (bearing == "608zz") ? _608zz_thickness |
67 | : (bearing == "625rs") ? _625rs_thickness |
a8c6c94f |
68 | : (bearing == "sr188") ? sr188_thickness |
0c7b5029 |
69 | : 1/0; |
7f1519fb |
70 | |
71 | spinner_height = penny_thickness * 5 + 2; |
818dd661 |
72 | arms = 3; |
73 | |
7f1519fb |
74 | module cap(bearing_inner_radius, |
75 | bearing_cap_footprint_radius, |
76 | bearing_cover_radius, |
3381230e |
77 | bearing_thickness, |
78 | bearing_window_radius) { |
79 | footprint_height = 4.5; |
80 | footprint_radius_safety = 0.2; |
7f1519fb |
81 | cap_height = 3; |
3381230e |
82 | bearing_thickness_safety = 0.6; |
23616d65 |
83 | finger_spot_height = cap_height * 2 / 3; |
84 | stripes = 3; |
7f1519fb |
85 | |
86 | difference() { |
87 | union() { |
88 | cylinder(r1 = bearing_cover_radius - tan(30) * cap_height, |
89 | r2 = bearing_cover_radius, |
90 | h = cap_height); |
3381230e |
91 | linear_extrude(height = cap_height |
92 | + footprint_height |
93 | - 1.05) { |
94 | circle(bearing_window_radius - 1); } |
7f1519fb |
95 | linear_extrude(height = cap_height + footprint_height) { |
96 | circle(bearing_cap_footprint_radius - footprint_radius_safety); } |
97 | linear_extrude(height = cap_height |
98 | + footprint_height |
99 | + bearing_thickness / 2 |
100 | - bearing_thickness_safety) { |
23616d65 |
101 | circle(bearing_inner_radius + 0.1); } } |
7f1519fb |
102 | translate([0, 0, -0.01]) { |
3381230e |
103 | cylinder(r1 = bearing_inner_radius, |
104 | r2 = bearing_inner_radius - tan(30) * finger_spot_height, |
23616d65 |
105 | h = finger_spot_height); |
106 | for(stripe = [0 : stripes - 1]) { |
107 | rotate((stripe / stripes) * 360) { |
108 | linear_extrude(height = finger_spot_height) { |
109 | polygon([[0, 0], |
110 | [bearing_cover_radius * 2, 0], |
111 | [cos(3 + 360 / (stripes * 2)) |
112 | * bearing_cover_radius * 2, |
113 | sin(3 + 360 / (stripes * 2)) |
114 | * bearing_cover_radius * 2]]); } } } } } } |
7f1519fb |
115 | |
d4c56d9d |
116 | module donut(height, footprint_radius) { |
117 | bread_radius = height / 2; |
118 | rotate_extrude() { |
119 | translate([footprint_radius, 0]) { |
120 | circle(bread_radius); } } } |
121 | |
122 | module donut_hole(height, footprint_radius) { |
123 | difference() { |
124 | cylinder(r = footprint_radius, h = height, center = true); |
125 | donut(height, footprint_radius); } } |
126 | |
127 | module jelly_filled(height, footprint_radius) { |
128 | cylinder(r = footprint_radius, h = height, center = true); |
129 | donut(height, footprint_radius); } |
130 | |
cc410ed6 |
131 | module fillet(r) { |
132 | offset(r = -r) { offset(delta = r) { children(); } } } |
133 | |
cc410ed6 |
134 | module mirrored(axis) { |
135 | children(); |
136 | mirror(axis) children(); } |
2645ef26 |
137 | |
5f8325d2 |
138 | module spin_slice(weight_radius, |
139 | bearing_radius, |
140 | round_extra, |
141 | wall, |
142 | arms) { |
143 | joiner_radius = (bearing_radius + weight_radius) / 2; |
144 | |
5f8325d2 |
145 | // a = side along x axis |
146 | a = bearing_radius + weight_radius + wall; |
147 | // b = side from center to joiner |
148 | b = bearing_radius + joiner_radius + round_extra; |
149 | // c = side between joiner and arm center |
150 | c = joiner_radius + weight_radius + round_extra; |
151 | |
5f8325d2 |
152 | cos_C = (pow(a, 2) + pow(b, 2) - pow(c, 2)) / (2 * a * b); |
153 | sin_C = sqrt(1 - pow(cos_C, 2)); |
154 | |
85cda07f |
155 | bearing_xy = [0, 0]; |
156 | weight_xy = [a, 0]; |
5f8325d2 |
157 | joiner_xy = [cos_C, sin_C] * b; |
158 | |
159 | for(arm = [0 : arms - 1]) { |
160 | rotate(arm * (360 / arms)) { |
161 | difference() { |
162 | union() { |
163 | translate(bearing_xy) { |
164 | circle(bearing_radius + round_extra); } |
165 | translate(weight_xy) { |
166 | circle(weight_radius + round_extra); } |
167 | mirrored([0, 1]) { |
168 | polygon([bearing_xy, weight_xy, joiner_xy]); } } |
169 | mirrored([0, 1]) { |
170 | translate(joiner_xy) { |
171 | circle(joiner_radius); } } } } } } |
172 | |
85cda07f |
173 | module spin_cosine_slice(weight_radius, |
174 | bearing_radius, |
175 | round_extra, |
176 | wall, |
177 | arms) { |
178 | /* in order to make a smooth transition from one arm to the next, |
179 | follow the path of a circle just barely touching both arms and |
180 | the center circle. this is referred to as the joiner circle. |
181 | |
182 | the joiner circle's radius and position are calculated using |
183 | geometry. the center of the bearing, weight and joiner circle |
184 | create a triangle. |
185 | |
186 | a = side between bearing and weight centers |
187 | b = side between bearing and joiner centers |
188 | c = side between joiner and weight centers |
189 | |
190 | A = angle opposite a, inside joiner |
191 | B = angle opposite b, inside weight |
192 | C = angle opposite c, inside bearing |
193 | */ |
194 | |
195 | r0 = bearing_radius; |
196 | r1 = weight_radius; |
197 | // slightly cheated. calculated using 3 arms, C = 60. |
198 | r2 = ((pow(r0, 2) |
199 | + r0 * wall |
200 | + r0 * r1 |
201 | + pow(wall, 2) |
202 | + 2 * r1 * wall |
203 | + r0 * round_extra |
204 | - wall * round_extra |
205 | - 3 * r1 * round_extra) |
206 | / (3 * r1 + wall - r0)); |
207 | |
208 | joiner_radius = r2; |
209 | |
210 | // a = side along x axis |
211 | a = r0 + wall + r1; |
212 | // b = side from center to joiner |
213 | b = r0 + round_extra + r2; |
214 | // c = side between joiner and arm center |
215 | c = r1 + round_extra + r2; |
216 | |
217 | bearing_xy = [0, 0]; |
218 | weight_xy = [a, 0]; |
219 | joiner_xy = [cos(60), sin(60)] * b; |
220 | |
221 | translate(bearing_xy) { |
222 | circle(bearing_radius + round_extra); } |
223 | for(arm = [0 : arms - 1]) { |
224 | rotate(arm * (360 / arms)) { |
225 | translate(weight_xy) { |
226 | circle(weight_radius + round_extra); } |
227 | mirrored([0, 1]) { |
228 | difference() { |
229 | polygon([bearing_xy, weight_xy, joiner_xy]); |
230 | translate(joiner_xy) { |
231 | circle(joiner_radius); } } } } } } |
232 | |
5f8325d2 |
233 | module spin_slices(weight_radius, |
234 | weight_thickness, |
235 | bearing_radius, |
236 | bearing_thickness, |
237 | weight_lip_overhang = 0.3, |
238 | bearing_lip_overhang = 0.3, |
239 | wall = 3, |
240 | arms = 3, |
241 | layer_height = 0.15) { |
cc410ed6 |
242 | thicker_thickness = (bearing_thickness > weight_thickness) ? |
243 | bearing_thickness : weight_thickness; |
244 | calculated_height = thicker_thickness + 2 * wall; |
245 | layers = 2 * ceil(ceil(calculated_height / layer_height) / 2); |
246 | actual_height = layers * layer_height; |
247 | round_radius = actual_height / 2; |
248 | |
5f8325d2 |
249 | /* rounding the outside edge of the spinner with a semi-circle leads |
250 | to a shape that an overhang on the second layer several times the |
251 | thickness of a printed extrusion width. |
252 | |
253 | rather than using a full semi-circle, this code aims to use just the |
254 | portion in the middle, where the overhang is less severe */ |
e1a02727 |
255 | old_start = 0; |
256 | old_end = (layers / 2) - 1; |
257 | |
5f8325d2 |
258 | /* add one to have some thickness all around weight holes |
259 | for first layer */ |
5fdbde1b |
260 | new_start = old_end / 16 + 1; |
e1a02727 |
261 | new_end = old_end; |
262 | |
263 | old_range = old_end - old_start; |
264 | new_range = new_end - new_start; |
265 | |
266 | factor = new_range / old_range; |
267 | |
5f8325d2 |
268 | /* initial adjacent is adjusted to (new start - 1) to allow some |
269 | thickness all around weight holes on first layer */ |
270 | initial_adjacent = round_radius - ((new_start - 1) * layer_height); |
e1a02727 |
271 | initial_angle = acos(initial_adjacent / round_radius); |
272 | initial_round_extra = initial_adjacent * tan(initial_angle); |
5f8325d2 |
273 | |
274 | difference() { |
275 | mirrored([0, 0, 1]) { |
276 | for(layer = [0 : (layers / 2) - 1]) { |
277 | translate([0, 0, layer * layer_height - actual_height / 2]) { |
278 | linear_extrude(height = layer_height) { |
279 | new_layer = (layer - old_start) * factor + new_start; |
280 | adjacent = round_radius - (new_layer * layer_height); |
281 | angle = acos(adjacent / round_radius); |
282 | round_extra = adjacent * tan(angle) - initial_round_extra; |
283 | spin_slice(weight_radius, |
284 | bearing_radius, |
285 | round_extra, |
286 | wall, |
287 | arms); } } } } |
85cda07f |
288 | cylinder(h = actual_height + 0.1, |
289 | r = bearing_radius - bearing_lip_overhang, |
290 | center = true); |
291 | cylinder(h = bearing_thickness + 0.05, |
292 | r = bearing_radius + 0.15, |
293 | center = true); |
294 | for(arm = [0 : arms - 1]) { |
295 | rotate(arm * (360 / arms)) { |
296 | translate([bearing_radius + wall + weight_radius, 0]) { |
297 | cylinder(h = actual_height + 0.1, |
298 | r = weight_radius - weight_lip_overhang, |
299 | center = true); |
300 | cylinder(h = weight_thickness + 0.05, |
301 | r = weight_radius + 0.15, |
302 | center = true); } } } } } |
303 | |
a8c6c94f |
304 | module equilateral_triangle(radius){ |
305 | polygon([[cos(0) * radius, sin(0) * radius], |
306 | [cos(120) * radius, |
307 | sin(120) * radius], |
308 | [cos(240) * radius, |
309 | sin(240) * radius]]); } |
310 | |
85cda07f |
311 | module spin_cosine(weight_radius, |
312 | weight_thickness, |
313 | bearing_radius, |
314 | bearing_thickness, |
315 | weight_lip_overhang = 0.3, |
316 | bearing_lip_overhang = 0.3, |
317 | wall = 3, |
318 | arms = 3, |
319 | layer_height = 0.15) { |
320 | thicker_thickness = (bearing_thickness > weight_thickness) ? |
321 | bearing_thickness : weight_thickness; |
322 | calculated_height = thicker_thickness + 2 * wall; |
323 | layers = 2 * ceil(ceil(calculated_height / layer_height) / 2); |
324 | actual_height = layers * layer_height; |
325 | round_radius = actual_height / 2; |
326 | |
327 | /* rounding the outside edge of the spinner with a semi-circle leads |
328 | to a shape that an overhang on the second layer several times the |
329 | thickness of a printed extrusion width. |
330 | |
331 | rather than using a full semi-circle, this code aims to use just the |
332 | portion in the middle, where the overhang is less severe */ |
333 | old_start = 0; |
334 | old_end = (layers / 2) - 1; |
335 | |
336 | /* add one to have some thickness all around weight holes |
337 | for first layer */ |
338 | new_start = old_end / 16 + 1; |
339 | new_end = old_end; |
340 | |
341 | old_range = old_end - old_start; |
342 | new_range = new_end - new_start; |
343 | |
344 | factor = new_range / old_range; |
345 | |
346 | /* initial adjacent is adjusted to (new start - 1) to allow some |
347 | thickness all around weight holes on first layer */ |
348 | initial_adjacent = round_radius - ((new_start - 1) * layer_height); |
349 | initial_angle = acos(initial_adjacent / round_radius); |
350 | initial_round_extra = initial_adjacent * tan(initial_angle); |
351 | |
352 | difference() { |
353 | mirrored([0, 0, 1]) { |
354 | for(layer = [0 : (layers / 2) - 1]) { |
355 | translate([0, 0, layer * layer_height - actual_height / 2]) { |
356 | linear_extrude(height = layer_height) { |
357 | new_layer = (layer - old_start) * factor + new_start; |
358 | adjacent = round_radius - (new_layer * layer_height); |
359 | angle = acos(adjacent / round_radius); |
360 | round_extra = adjacent * tan(angle) - initial_round_extra; |
361 | spin_cosine_slice(weight_radius, |
362 | bearing_radius, |
363 | round_extra, |
364 | wall, |
365 | arms); } } } } |
baad6cfa |
366 | // bearing window hole |
367 | /*cylinder(h = actual_height + 0.1, |
5f8325d2 |
368 | r = bearing_radius - bearing_lip_overhang, |
baad6cfa |
369 | center = true);*/ |
370 | linear_extrude(height = actual_height + 0.1, center = true) { |
371 | intersection() { |
a8c6c94f |
372 | equilateral_triangle(1.8 * bearing_radius); |
baad6cfa |
373 | circle(bearing_radius + 0.1); } } |
374 | // bearing cavity |
5fdbde1b |
375 | cylinder(h = bearing_thickness + 0.05, |
376 | r = bearing_radius + 0.15, |
5f8325d2 |
377 | center = true); |
baad6cfa |
378 | // arm holes |
5f8325d2 |
379 | for(arm = [0 : arms - 1]) { |
380 | rotate(arm * (360 / arms)) { |
381 | translate([bearing_radius + wall + weight_radius, 0]) { |
baad6cfa |
382 | // weight window hole |
383 | mirrored([0, 0, 1]) { |
384 | translate([0, 0, (weight_thickness + 0.05) / 2]) { |
385 | linear_extrude(height = wall + 0.1) { |
386 | intersection(){ |
a8c6c94f |
387 | equilateral_triangle(1.8 * weight_radius); |
baad6cfa |
388 | circle(weight_radius + 0.2); } } } } |
389 | // weight cavity |
5fdbde1b |
390 | cylinder(h = weight_thickness + 0.05, |
baad6cfa |
391 | r = weight_radius + 0.20, |
5f8325d2 |
392 | center = true); } } } } } |
818dd661 |
393 | |
1dc634e1 |
394 | module spin_donut(weight_radius, |
395 | weight_thickness, |
396 | bearing_radius, |
397 | bearing_thickness, |
398 | weight_lip_overhang, |
399 | bearing_lip_overhang, |
400 | wall, |
401 | arms) { |
402 | thicker_thickness = (bearing_thickness > weight_thickness) |
403 | ? bearing_thickness : weight_thickness; |
404 | height = thicker_thickness + wall * 2; |
405 | |
406 | center_to_arm_center = bearing_radius + wall + weight_radius; |
407 | |
408 | jelly_filled(height, bearing_radius); |
409 | for(arm = [0 : arms]) { |
410 | rotate(arm * (360 / arms)) { |
411 | translate([center_to_arm_center, 0, 0]) { |
412 | jelly_filled(height, weight_radius); } } } } |
413 | |
818dd661 |
414 | /* |
415 | This file is part of 3d-printables. |
416 | |
417 | 3d-printables is free software: you can redistribute it and/or modify |
418 | it under the terms of the GNU Affero General Public License as published by |
419 | the Free Software Foundation, either version 3 of the License, or |
420 | (at your option) any later version. |
421 | |
422 | 3d-printables is distributed in the hope that it will be useful, |
423 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
424 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
425 | GNU Affero General Public License for more details. |
426 | |
427 | You should have received a copy of the GNU Affero General Public License |
428 | along with challenge-bot. If not, see <http://www.gnu.org/licenses/>. |
429 | */ |