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 | |
3e3691aa |
12 | bearing = "608zz"; |
0c7b5029 |
13 | // bearing = "625rs"; |
14 | |
cc410ed6 |
15 | weight_lip_overhang = 0.3; |
16 | bearing_lip_overhang = weight_lip_overhang; |
cc410ed6 |
17 | wall = 3; |
2645ef26 |
18 | penny_thickness = 1.52; |
818dd661 |
19 | penny_radius = 19.05 / 2; |
7f1519fb |
20 | |
21 | _608zz_radius = 22 / 2; |
22 | _608zz_inner_radius = 8.1 / 2; |
8d55712b |
23 | _608zz_cover_radius = _608zz_radius; |
7f1519fb |
24 | _608zz_cap_footprint_radius = 12 / 2; |
25 | _608zz_thickness = 7; |
26 | |
0c7b5029 |
27 | _625rs_radius = 16 / 2; |
28 | _625rs_inner_radius = 5 / 2; |
29 | _625rs_thickness = 5; |
30 | _625rs_cover_radius = _625rs_radius; |
31 | _625rs_cap_footprint_radius = _625rs_inner_radius + 1; |
32 | |
818dd661 |
33 | weight_radius = (weight == "penny") ? penny_radius : _608zz_radius; |
2645ef26 |
34 | weight_thickness = (weight == "penny") ? |
35 | penny_thickness * 5 : _608zz_thickness; |
7f1519fb |
36 | |
0c7b5029 |
37 | bearing_radius = |
38 | (bearing == "608zz") ? _608zz_radius |
39 | : (bearing == "625rs") ? _625rs_radius |
40 | : 1/0; |
3381230e |
41 | bearing_window_radius = bearing_radius - bearing_lip_overhang - 1; |
0c7b5029 |
42 | bearing_inner_radius = |
43 | (bearing == "608zz") ? _608zz_inner_radius |
04db4766 |
44 | : (bearing == "625rs") ? _625rs_inner_radius |
0c7b5029 |
45 | : 1/0; |
46 | bearing_cover_radius = |
47 | (bearing == "608zz") ? _608zz_cover_radius |
48 | : (bearing == "625rs") ? _625rs_cover_radius |
49 | : 1/0; |
7f1519fb |
50 | bearing_cap_footprint_radius = |
0c7b5029 |
51 | (bearing == "608zz") ? _608zz_cap_footprint_radius |
52 | : (bearing == "625rs" ) ? _625rs_cap_footprint_radius |
53 | : 1/0; |
54 | bearing_thickness = |
55 | (bearing == "608zz") ? _608zz_thickness |
56 | : (bearing == "625rs") ? _625rs_thickness |
57 | : 1/0; |
7f1519fb |
58 | |
59 | spinner_height = penny_thickness * 5 + 2; |
818dd661 |
60 | arms = 3; |
61 | |
7f1519fb |
62 | module cap(bearing_inner_radius, |
63 | bearing_cap_footprint_radius, |
64 | bearing_cover_radius, |
3381230e |
65 | bearing_thickness, |
66 | bearing_window_radius) { |
67 | footprint_height = 4.5; |
68 | footprint_radius_safety = 0.2; |
7f1519fb |
69 | cap_height = 3; |
3381230e |
70 | bearing_thickness_safety = 0.6; |
23616d65 |
71 | finger_spot_height = cap_height * 2 / 3; |
72 | stripes = 3; |
7f1519fb |
73 | |
74 | difference() { |
75 | union() { |
76 | cylinder(r1 = bearing_cover_radius - tan(30) * cap_height, |
77 | r2 = bearing_cover_radius, |
78 | h = cap_height); |
3381230e |
79 | linear_extrude(height = cap_height |
80 | + footprint_height |
81 | - 1.05) { |
82 | circle(bearing_window_radius - 1); } |
7f1519fb |
83 | linear_extrude(height = cap_height + footprint_height) { |
84 | circle(bearing_cap_footprint_radius - footprint_radius_safety); } |
85 | linear_extrude(height = cap_height |
86 | + footprint_height |
87 | + bearing_thickness / 2 |
88 | - bearing_thickness_safety) { |
23616d65 |
89 | circle(bearing_inner_radius + 0.1); } } |
7f1519fb |
90 | translate([0, 0, -0.01]) { |
3381230e |
91 | cylinder(r1 = bearing_inner_radius, |
92 | r2 = bearing_inner_radius - tan(30) * finger_spot_height, |
23616d65 |
93 | h = finger_spot_height); |
94 | for(stripe = [0 : stripes - 1]) { |
95 | rotate((stripe / stripes) * 360) { |
96 | linear_extrude(height = finger_spot_height) { |
97 | polygon([[0, 0], |
98 | [bearing_cover_radius * 2, 0], |
99 | [cos(3 + 360 / (stripes * 2)) |
100 | * bearing_cover_radius * 2, |
101 | sin(3 + 360 / (stripes * 2)) |
102 | * bearing_cover_radius * 2]]); } } } } } } |
7f1519fb |
103 | |
d4c56d9d |
104 | module donut(height, footprint_radius) { |
105 | bread_radius = height / 2; |
106 | rotate_extrude() { |
107 | translate([footprint_radius, 0]) { |
108 | circle(bread_radius); } } } |
109 | |
110 | module donut_hole(height, footprint_radius) { |
111 | difference() { |
112 | cylinder(r = footprint_radius, h = height, center = true); |
113 | donut(height, footprint_radius); } } |
114 | |
115 | module jelly_filled(height, footprint_radius) { |
116 | cylinder(r = footprint_radius, h = height, center = true); |
117 | donut(height, footprint_radius); } |
118 | |
cc410ed6 |
119 | module fillet(r) { |
120 | offset(r = -r) { offset(delta = r) { children(); } } } |
121 | |
cc410ed6 |
122 | module mirrored(axis) { |
123 | children(); |
124 | mirror(axis) children(); } |
2645ef26 |
125 | |
5f8325d2 |
126 | module spin_slice(weight_radius, |
127 | bearing_radius, |
128 | round_extra, |
129 | wall, |
130 | arms) { |
131 | joiner_radius = (bearing_radius + weight_radius) / 2; |
132 | |
5f8325d2 |
133 | // a = side along x axis |
134 | a = bearing_radius + weight_radius + wall; |
135 | // b = side from center to joiner |
136 | b = bearing_radius + joiner_radius + round_extra; |
137 | // c = side between joiner and arm center |
138 | c = joiner_radius + weight_radius + round_extra; |
139 | |
5f8325d2 |
140 | cos_C = (pow(a, 2) + pow(b, 2) - pow(c, 2)) / (2 * a * b); |
141 | sin_C = sqrt(1 - pow(cos_C, 2)); |
142 | |
85cda07f |
143 | bearing_xy = [0, 0]; |
144 | weight_xy = [a, 0]; |
5f8325d2 |
145 | joiner_xy = [cos_C, sin_C] * b; |
146 | |
147 | for(arm = [0 : arms - 1]) { |
148 | rotate(arm * (360 / arms)) { |
149 | difference() { |
150 | union() { |
151 | translate(bearing_xy) { |
152 | circle(bearing_radius + round_extra); } |
153 | translate(weight_xy) { |
154 | circle(weight_radius + round_extra); } |
155 | mirrored([0, 1]) { |
156 | polygon([bearing_xy, weight_xy, joiner_xy]); } } |
157 | mirrored([0, 1]) { |
158 | translate(joiner_xy) { |
159 | circle(joiner_radius); } } } } } } |
160 | |
85cda07f |
161 | module spin_cosine_slice(weight_radius, |
162 | bearing_radius, |
163 | round_extra, |
164 | wall, |
165 | arms) { |
166 | /* in order to make a smooth transition from one arm to the next, |
167 | follow the path of a circle just barely touching both arms and |
168 | the center circle. this is referred to as the joiner circle. |
169 | |
170 | the joiner circle's radius and position are calculated using |
171 | geometry. the center of the bearing, weight and joiner circle |
172 | create a triangle. |
173 | |
174 | a = side between bearing and weight centers |
175 | b = side between bearing and joiner centers |
176 | c = side between joiner and weight centers |
177 | |
178 | A = angle opposite a, inside joiner |
179 | B = angle opposite b, inside weight |
180 | C = angle opposite c, inside bearing |
181 | */ |
182 | |
183 | r0 = bearing_radius; |
184 | r1 = weight_radius; |
185 | // slightly cheated. calculated using 3 arms, C = 60. |
186 | r2 = ((pow(r0, 2) |
187 | + r0 * wall |
188 | + r0 * r1 |
189 | + pow(wall, 2) |
190 | + 2 * r1 * wall |
191 | + r0 * round_extra |
192 | - wall * round_extra |
193 | - 3 * r1 * round_extra) |
194 | / (3 * r1 + wall - r0)); |
195 | |
196 | joiner_radius = r2; |
197 | |
198 | // a = side along x axis |
199 | a = r0 + wall + r1; |
200 | // b = side from center to joiner |
201 | b = r0 + round_extra + r2; |
202 | // c = side between joiner and arm center |
203 | c = r1 + round_extra + r2; |
204 | |
205 | bearing_xy = [0, 0]; |
206 | weight_xy = [a, 0]; |
207 | joiner_xy = [cos(60), sin(60)] * b; |
208 | |
209 | translate(bearing_xy) { |
210 | circle(bearing_radius + round_extra); } |
211 | for(arm = [0 : arms - 1]) { |
212 | rotate(arm * (360 / arms)) { |
213 | translate(weight_xy) { |
214 | circle(weight_radius + round_extra); } |
215 | mirrored([0, 1]) { |
216 | difference() { |
217 | polygon([bearing_xy, weight_xy, joiner_xy]); |
218 | translate(joiner_xy) { |
219 | circle(joiner_radius); } } } } } } |
220 | |
5f8325d2 |
221 | module spin_slices(weight_radius, |
222 | weight_thickness, |
223 | bearing_radius, |
224 | bearing_thickness, |
225 | weight_lip_overhang = 0.3, |
226 | bearing_lip_overhang = 0.3, |
227 | wall = 3, |
228 | arms = 3, |
229 | layer_height = 0.15) { |
cc410ed6 |
230 | thicker_thickness = (bearing_thickness > weight_thickness) ? |
231 | bearing_thickness : weight_thickness; |
232 | calculated_height = thicker_thickness + 2 * wall; |
233 | layers = 2 * ceil(ceil(calculated_height / layer_height) / 2); |
234 | actual_height = layers * layer_height; |
235 | round_radius = actual_height / 2; |
236 | |
5f8325d2 |
237 | /* rounding the outside edge of the spinner with a semi-circle leads |
238 | to a shape that an overhang on the second layer several times the |
239 | thickness of a printed extrusion width. |
240 | |
241 | rather than using a full semi-circle, this code aims to use just the |
242 | portion in the middle, where the overhang is less severe */ |
e1a02727 |
243 | old_start = 0; |
244 | old_end = (layers / 2) - 1; |
245 | |
5f8325d2 |
246 | /* add one to have some thickness all around weight holes |
247 | for first layer */ |
5fdbde1b |
248 | new_start = old_end / 16 + 1; |
e1a02727 |
249 | new_end = old_end; |
250 | |
251 | old_range = old_end - old_start; |
252 | new_range = new_end - new_start; |
253 | |
254 | factor = new_range / old_range; |
255 | |
5f8325d2 |
256 | /* initial adjacent is adjusted to (new start - 1) to allow some |
257 | thickness all around weight holes on first layer */ |
258 | initial_adjacent = round_radius - ((new_start - 1) * layer_height); |
e1a02727 |
259 | initial_angle = acos(initial_adjacent / round_radius); |
260 | initial_round_extra = initial_adjacent * tan(initial_angle); |
5f8325d2 |
261 | |
262 | difference() { |
263 | mirrored([0, 0, 1]) { |
264 | for(layer = [0 : (layers / 2) - 1]) { |
265 | translate([0, 0, layer * layer_height - actual_height / 2]) { |
266 | linear_extrude(height = layer_height) { |
267 | new_layer = (layer - old_start) * factor + new_start; |
268 | adjacent = round_radius - (new_layer * layer_height); |
269 | angle = acos(adjacent / round_radius); |
270 | round_extra = adjacent * tan(angle) - initial_round_extra; |
271 | spin_slice(weight_radius, |
272 | bearing_radius, |
273 | round_extra, |
274 | wall, |
275 | arms); } } } } |
85cda07f |
276 | cylinder(h = actual_height + 0.1, |
277 | r = bearing_radius - bearing_lip_overhang, |
278 | center = true); |
279 | cylinder(h = bearing_thickness + 0.05, |
280 | r = bearing_radius + 0.15, |
281 | center = true); |
282 | for(arm = [0 : arms - 1]) { |
283 | rotate(arm * (360 / arms)) { |
284 | translate([bearing_radius + wall + weight_radius, 0]) { |
285 | cylinder(h = actual_height + 0.1, |
286 | r = weight_radius - weight_lip_overhang, |
287 | center = true); |
288 | cylinder(h = weight_thickness + 0.05, |
289 | r = weight_radius + 0.15, |
290 | center = true); } } } } } |
291 | |
292 | module spin_cosine(weight_radius, |
293 | weight_thickness, |
294 | bearing_radius, |
295 | bearing_thickness, |
296 | weight_lip_overhang = 0.3, |
297 | bearing_lip_overhang = 0.3, |
298 | wall = 3, |
299 | arms = 3, |
300 | layer_height = 0.15) { |
301 | thicker_thickness = (bearing_thickness > weight_thickness) ? |
302 | bearing_thickness : weight_thickness; |
303 | calculated_height = thicker_thickness + 2 * wall; |
304 | layers = 2 * ceil(ceil(calculated_height / layer_height) / 2); |
305 | actual_height = layers * layer_height; |
306 | round_radius = actual_height / 2; |
307 | |
308 | /* rounding the outside edge of the spinner with a semi-circle leads |
309 | to a shape that an overhang on the second layer several times the |
310 | thickness of a printed extrusion width. |
311 | |
312 | rather than using a full semi-circle, this code aims to use just the |
313 | portion in the middle, where the overhang is less severe */ |
314 | old_start = 0; |
315 | old_end = (layers / 2) - 1; |
316 | |
317 | /* add one to have some thickness all around weight holes |
318 | for first layer */ |
319 | new_start = old_end / 16 + 1; |
320 | new_end = old_end; |
321 | |
322 | old_range = old_end - old_start; |
323 | new_range = new_end - new_start; |
324 | |
325 | factor = new_range / old_range; |
326 | |
327 | /* initial adjacent is adjusted to (new start - 1) to allow some |
328 | thickness all around weight holes on first layer */ |
329 | initial_adjacent = round_radius - ((new_start - 1) * layer_height); |
330 | initial_angle = acos(initial_adjacent / round_radius); |
331 | initial_round_extra = initial_adjacent * tan(initial_angle); |
332 | |
333 | difference() { |
334 | mirrored([0, 0, 1]) { |
335 | for(layer = [0 : (layers / 2) - 1]) { |
336 | translate([0, 0, layer * layer_height - actual_height / 2]) { |
337 | linear_extrude(height = layer_height) { |
338 | new_layer = (layer - old_start) * factor + new_start; |
339 | adjacent = round_radius - (new_layer * layer_height); |
340 | angle = acos(adjacent / round_radius); |
341 | round_extra = adjacent * tan(angle) - initial_round_extra; |
342 | spin_cosine_slice(weight_radius, |
343 | bearing_radius, |
344 | round_extra, |
345 | wall, |
346 | arms); } } } } |
5f8325d2 |
347 | cylinder(h = actual_height + 0.1, |
348 | r = bearing_radius - bearing_lip_overhang, |
349 | center = true); |
5fdbde1b |
350 | cylinder(h = bearing_thickness + 0.05, |
351 | r = bearing_radius + 0.15, |
5f8325d2 |
352 | center = true); |
353 | for(arm = [0 : arms - 1]) { |
354 | rotate(arm * (360 / arms)) { |
355 | translate([bearing_radius + wall + weight_radius, 0]) { |
356 | cylinder(h = actual_height + 0.1, |
357 | r = weight_radius - weight_lip_overhang, |
358 | center = true); |
5fdbde1b |
359 | cylinder(h = weight_thickness + 0.05, |
360 | r = weight_radius + 0.15, |
5f8325d2 |
361 | center = true); } } } } } |
818dd661 |
362 | |
1dc634e1 |
363 | module spin_donut(weight_radius, |
364 | weight_thickness, |
365 | bearing_radius, |
366 | bearing_thickness, |
367 | weight_lip_overhang, |
368 | bearing_lip_overhang, |
369 | wall, |
370 | arms) { |
371 | thicker_thickness = (bearing_thickness > weight_thickness) |
372 | ? bearing_thickness : weight_thickness; |
373 | height = thicker_thickness + wall * 2; |
374 | |
375 | center_to_arm_center = bearing_radius + wall + weight_radius; |
376 | |
377 | jelly_filled(height, bearing_radius); |
378 | for(arm = [0 : arms]) { |
379 | rotate(arm * (360 / arms)) { |
380 | translate([center_to_arm_center, 0, 0]) { |
381 | jelly_filled(height, weight_radius); } } } } |
382 | |
818dd661 |
383 | /* |
384 | This file is part of 3d-printables. |
385 | |
386 | 3d-printables is free software: you can redistribute it and/or modify |
387 | it under the terms of the GNU Affero General Public License as published by |
388 | the Free Software Foundation, either version 3 of the License, or |
389 | (at your option) any later version. |
390 | |
391 | 3d-printables is distributed in the hope that it will be useful, |
392 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
393 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
394 | GNU Affero General Public License for more details. |
395 | |
396 | You should have received a copy of the GNU Affero General Public License |
397 | along with challenge-bot. If not, see <http://www.gnu.org/licenses/>. |
398 | */ |