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 |
44 | : (bearing == "625rs") ? _608zz_inner_radius |
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; |
71 | finger_spot_height = cap_height / 10; |
7f1519fb |
72 | |
73 | difference() { |
74 | union() { |
75 | cylinder(r1 = bearing_cover_radius - tan(30) * cap_height, |
76 | r2 = bearing_cover_radius, |
77 | h = cap_height); |
3381230e |
78 | linear_extrude(height = cap_height |
79 | + footprint_height |
80 | - 1.05) { |
81 | circle(bearing_window_radius - 1); } |
7f1519fb |
82 | linear_extrude(height = cap_height + footprint_height) { |
83 | circle(bearing_cap_footprint_radius - footprint_radius_safety); } |
84 | linear_extrude(height = cap_height |
85 | + footprint_height |
86 | + bearing_thickness / 2 |
87 | - bearing_thickness_safety) { |
3381230e |
88 | circle(bearing_inner_radius); } |
89 | } |
7f1519fb |
90 | translate([0, 0, -0.01]) { |
3381230e |
91 | cylinder(r1 = bearing_inner_radius, |
92 | r2 = bearing_inner_radius - tan(30) * finger_spot_height, |
93 | h = finger_spot_height); } } } |
7f1519fb |
94 | |
d4c56d9d |
95 | module donut(height, footprint_radius) { |
96 | bread_radius = height / 2; |
97 | rotate_extrude() { |
98 | translate([footprint_radius, 0]) { |
99 | circle(bread_radius); } } } |
100 | |
101 | module donut_hole(height, footprint_radius) { |
102 | difference() { |
103 | cylinder(r = footprint_radius, h = height, center = true); |
104 | donut(height, footprint_radius); } } |
105 | |
106 | module jelly_filled(height, footprint_radius) { |
107 | cylinder(r = footprint_radius, h = height, center = true); |
108 | donut(height, footprint_radius); } |
109 | |
cc410ed6 |
110 | module fillet(r) { |
111 | offset(r = -r) { offset(delta = r) { children(); } } } |
112 | |
cc410ed6 |
113 | module mirrored(axis) { |
114 | children(); |
115 | mirror(axis) children(); } |
2645ef26 |
116 | |
5f8325d2 |
117 | module spin_slice(weight_radius, |
118 | bearing_radius, |
119 | round_extra, |
120 | wall, |
121 | arms) { |
122 | joiner_radius = (bearing_radius + weight_radius) / 2; |
123 | |
5f8325d2 |
124 | // a = side along x axis |
125 | a = bearing_radius + weight_radius + wall; |
126 | // b = side from center to joiner |
127 | b = bearing_radius + joiner_radius + round_extra; |
128 | // c = side between joiner and arm center |
129 | c = joiner_radius + weight_radius + round_extra; |
130 | |
5f8325d2 |
131 | cos_C = (pow(a, 2) + pow(b, 2) - pow(c, 2)) / (2 * a * b); |
132 | sin_C = sqrt(1 - pow(cos_C, 2)); |
133 | |
85cda07f |
134 | bearing_xy = [0, 0]; |
135 | weight_xy = [a, 0]; |
5f8325d2 |
136 | joiner_xy = [cos_C, sin_C] * b; |
137 | |
138 | for(arm = [0 : arms - 1]) { |
139 | rotate(arm * (360 / arms)) { |
140 | difference() { |
141 | union() { |
142 | translate(bearing_xy) { |
143 | circle(bearing_radius + round_extra); } |
144 | translate(weight_xy) { |
145 | circle(weight_radius + round_extra); } |
146 | mirrored([0, 1]) { |
147 | polygon([bearing_xy, weight_xy, joiner_xy]); } } |
148 | mirrored([0, 1]) { |
149 | translate(joiner_xy) { |
150 | circle(joiner_radius); } } } } } } |
151 | |
85cda07f |
152 | module spin_cosine_slice(weight_radius, |
153 | bearing_radius, |
154 | round_extra, |
155 | wall, |
156 | arms) { |
157 | /* in order to make a smooth transition from one arm to the next, |
158 | follow the path of a circle just barely touching both arms and |
159 | the center circle. this is referred to as the joiner circle. |
160 | |
161 | the joiner circle's radius and position are calculated using |
162 | geometry. the center of the bearing, weight and joiner circle |
163 | create a triangle. |
164 | |
165 | a = side between bearing and weight centers |
166 | b = side between bearing and joiner centers |
167 | c = side between joiner and weight centers |
168 | |
169 | A = angle opposite a, inside joiner |
170 | B = angle opposite b, inside weight |
171 | C = angle opposite c, inside bearing |
172 | */ |
173 | |
174 | r0 = bearing_radius; |
175 | r1 = weight_radius; |
176 | // slightly cheated. calculated using 3 arms, C = 60. |
177 | r2 = ((pow(r0, 2) |
178 | + r0 * wall |
179 | + r0 * r1 |
180 | + pow(wall, 2) |
181 | + 2 * r1 * wall |
182 | + r0 * round_extra |
183 | - wall * round_extra |
184 | - 3 * r1 * round_extra) |
185 | / (3 * r1 + wall - r0)); |
186 | |
187 | joiner_radius = r2; |
188 | |
189 | // a = side along x axis |
190 | a = r0 + wall + r1; |
191 | // b = side from center to joiner |
192 | b = r0 + round_extra + r2; |
193 | // c = side between joiner and arm center |
194 | c = r1 + round_extra + r2; |
195 | |
196 | bearing_xy = [0, 0]; |
197 | weight_xy = [a, 0]; |
198 | joiner_xy = [cos(60), sin(60)] * b; |
199 | |
200 | translate(bearing_xy) { |
201 | circle(bearing_radius + round_extra); } |
202 | for(arm = [0 : arms - 1]) { |
203 | rotate(arm * (360 / arms)) { |
204 | translate(weight_xy) { |
205 | circle(weight_radius + round_extra); } |
206 | mirrored([0, 1]) { |
207 | difference() { |
208 | polygon([bearing_xy, weight_xy, joiner_xy]); |
209 | translate(joiner_xy) { |
210 | circle(joiner_radius); } } } } } } |
211 | |
5f8325d2 |
212 | module spin_slices(weight_radius, |
213 | weight_thickness, |
214 | bearing_radius, |
215 | bearing_thickness, |
216 | weight_lip_overhang = 0.3, |
217 | bearing_lip_overhang = 0.3, |
218 | wall = 3, |
219 | arms = 3, |
220 | layer_height = 0.15) { |
cc410ed6 |
221 | thicker_thickness = (bearing_thickness > weight_thickness) ? |
222 | bearing_thickness : weight_thickness; |
223 | calculated_height = thicker_thickness + 2 * wall; |
224 | layers = 2 * ceil(ceil(calculated_height / layer_height) / 2); |
225 | actual_height = layers * layer_height; |
226 | round_radius = actual_height / 2; |
227 | |
5f8325d2 |
228 | /* rounding the outside edge of the spinner with a semi-circle leads |
229 | to a shape that an overhang on the second layer several times the |
230 | thickness of a printed extrusion width. |
231 | |
232 | rather than using a full semi-circle, this code aims to use just the |
233 | portion in the middle, where the overhang is less severe */ |
e1a02727 |
234 | old_start = 0; |
235 | old_end = (layers / 2) - 1; |
236 | |
5f8325d2 |
237 | /* add one to have some thickness all around weight holes |
238 | for first layer */ |
5fdbde1b |
239 | new_start = old_end / 16 + 1; |
e1a02727 |
240 | new_end = old_end; |
241 | |
242 | old_range = old_end - old_start; |
243 | new_range = new_end - new_start; |
244 | |
245 | factor = new_range / old_range; |
246 | |
5f8325d2 |
247 | /* initial adjacent is adjusted to (new start - 1) to allow some |
248 | thickness all around weight holes on first layer */ |
249 | initial_adjacent = round_radius - ((new_start - 1) * layer_height); |
e1a02727 |
250 | initial_angle = acos(initial_adjacent / round_radius); |
251 | initial_round_extra = initial_adjacent * tan(initial_angle); |
5f8325d2 |
252 | |
253 | difference() { |
254 | mirrored([0, 0, 1]) { |
255 | for(layer = [0 : (layers / 2) - 1]) { |
256 | translate([0, 0, layer * layer_height - actual_height / 2]) { |
257 | linear_extrude(height = layer_height) { |
258 | new_layer = (layer - old_start) * factor + new_start; |
259 | adjacent = round_radius - (new_layer * layer_height); |
260 | angle = acos(adjacent / round_radius); |
261 | round_extra = adjacent * tan(angle) - initial_round_extra; |
262 | spin_slice(weight_radius, |
263 | bearing_radius, |
264 | round_extra, |
265 | wall, |
266 | arms); } } } } |
85cda07f |
267 | cylinder(h = actual_height + 0.1, |
268 | r = bearing_radius - bearing_lip_overhang, |
269 | center = true); |
270 | cylinder(h = bearing_thickness + 0.05, |
271 | r = bearing_radius + 0.15, |
272 | center = true); |
273 | for(arm = [0 : arms - 1]) { |
274 | rotate(arm * (360 / arms)) { |
275 | translate([bearing_radius + wall + weight_radius, 0]) { |
276 | cylinder(h = actual_height + 0.1, |
277 | r = weight_radius - weight_lip_overhang, |
278 | center = true); |
279 | cylinder(h = weight_thickness + 0.05, |
280 | r = weight_radius + 0.15, |
281 | center = true); } } } } } |
282 | |
283 | module spin_cosine(weight_radius, |
284 | weight_thickness, |
285 | bearing_radius, |
286 | bearing_thickness, |
287 | weight_lip_overhang = 0.3, |
288 | bearing_lip_overhang = 0.3, |
289 | wall = 3, |
290 | arms = 3, |
291 | layer_height = 0.15) { |
292 | thicker_thickness = (bearing_thickness > weight_thickness) ? |
293 | bearing_thickness : weight_thickness; |
294 | calculated_height = thicker_thickness + 2 * wall; |
295 | layers = 2 * ceil(ceil(calculated_height / layer_height) / 2); |
296 | actual_height = layers * layer_height; |
297 | round_radius = actual_height / 2; |
298 | |
299 | /* rounding the outside edge of the spinner with a semi-circle leads |
300 | to a shape that an overhang on the second layer several times the |
301 | thickness of a printed extrusion width. |
302 | |
303 | rather than using a full semi-circle, this code aims to use just the |
304 | portion in the middle, where the overhang is less severe */ |
305 | old_start = 0; |
306 | old_end = (layers / 2) - 1; |
307 | |
308 | /* add one to have some thickness all around weight holes |
309 | for first layer */ |
310 | new_start = old_end / 16 + 1; |
311 | new_end = old_end; |
312 | |
313 | old_range = old_end - old_start; |
314 | new_range = new_end - new_start; |
315 | |
316 | factor = new_range / old_range; |
317 | |
318 | /* initial adjacent is adjusted to (new start - 1) to allow some |
319 | thickness all around weight holes on first layer */ |
320 | initial_adjacent = round_radius - ((new_start - 1) * layer_height); |
321 | initial_angle = acos(initial_adjacent / round_radius); |
322 | initial_round_extra = initial_adjacent * tan(initial_angle); |
323 | |
324 | difference() { |
325 | mirrored([0, 0, 1]) { |
326 | for(layer = [0 : (layers / 2) - 1]) { |
327 | translate([0, 0, layer * layer_height - actual_height / 2]) { |
328 | linear_extrude(height = layer_height) { |
329 | new_layer = (layer - old_start) * factor + new_start; |
330 | adjacent = round_radius - (new_layer * layer_height); |
331 | angle = acos(adjacent / round_radius); |
332 | round_extra = adjacent * tan(angle) - initial_round_extra; |
333 | spin_cosine_slice(weight_radius, |
334 | bearing_radius, |
335 | round_extra, |
336 | wall, |
337 | arms); } } } } |
5f8325d2 |
338 | cylinder(h = actual_height + 0.1, |
339 | r = bearing_radius - bearing_lip_overhang, |
340 | center = true); |
5fdbde1b |
341 | cylinder(h = bearing_thickness + 0.05, |
342 | r = bearing_radius + 0.15, |
5f8325d2 |
343 | center = true); |
344 | for(arm = [0 : arms - 1]) { |
345 | rotate(arm * (360 / arms)) { |
346 | translate([bearing_radius + wall + weight_radius, 0]) { |
347 | cylinder(h = actual_height + 0.1, |
348 | r = weight_radius - weight_lip_overhang, |
349 | center = true); |
5fdbde1b |
350 | cylinder(h = weight_thickness + 0.05, |
351 | r = weight_radius + 0.15, |
5f8325d2 |
352 | center = true); } } } } } |
818dd661 |
353 | |
1dc634e1 |
354 | module spin_donut(weight_radius, |
355 | weight_thickness, |
356 | bearing_radius, |
357 | bearing_thickness, |
358 | weight_lip_overhang, |
359 | bearing_lip_overhang, |
360 | wall, |
361 | arms) { |
362 | thicker_thickness = (bearing_thickness > weight_thickness) |
363 | ? bearing_thickness : weight_thickness; |
364 | height = thicker_thickness + wall * 2; |
365 | |
366 | center_to_arm_center = bearing_radius + wall + weight_radius; |
367 | |
368 | jelly_filled(height, bearing_radius); |
369 | for(arm = [0 : arms]) { |
370 | rotate(arm * (360 / arms)) { |
371 | translate([center_to_arm_center, 0, 0]) { |
372 | jelly_filled(height, weight_radius); } } } } |
373 | |
818dd661 |
374 | /* |
375 | This file is part of 3d-printables. |
376 | |
377 | 3d-printables is free software: you can redistribute it and/or modify |
378 | it under the terms of the GNU Affero General Public License as published by |
379 | the Free Software Foundation, either version 3 of the License, or |
380 | (at your option) any later version. |
381 | |
382 | 3d-printables is distributed in the hope that it will be useful, |
383 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
384 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
385 | GNU Affero General Public License for more details. |
386 | |
387 | You should have received a copy of the GNU Affero General Public License |
388 | along with challenge-bot. If not, see <http://www.gnu.org/licenses/>. |
389 | */ |