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 | |
124 | bearing_xy = [0, 0]; |
125 | // a = side along x axis |
126 | a = bearing_radius + weight_radius + wall; |
127 | // b = side from center to joiner |
128 | b = bearing_radius + joiner_radius + round_extra; |
129 | // c = side between joiner and arm center |
130 | c = joiner_radius + weight_radius + round_extra; |
131 | |
132 | weight_xy = [a, 0]; |
133 | |
134 | cos_C = (pow(a, 2) + pow(b, 2) - pow(c, 2)) / (2 * a * b); |
135 | sin_C = sqrt(1 - pow(cos_C, 2)); |
136 | |
137 | joiner_xy = [cos_C, sin_C] * b; |
138 | |
139 | for(arm = [0 : arms - 1]) { |
140 | rotate(arm * (360 / arms)) { |
141 | difference() { |
142 | union() { |
143 | translate(bearing_xy) { |
144 | circle(bearing_radius + round_extra); } |
145 | translate(weight_xy) { |
146 | circle(weight_radius + round_extra); } |
147 | mirrored([0, 1]) { |
148 | polygon([bearing_xy, weight_xy, joiner_xy]); } } |
149 | mirrored([0, 1]) { |
150 | translate(joiner_xy) { |
151 | circle(joiner_radius); } } } } } } |
152 | |
153 | module spin_slices(weight_radius, |
154 | weight_thickness, |
155 | bearing_radius, |
156 | bearing_thickness, |
157 | weight_lip_overhang = 0.3, |
158 | bearing_lip_overhang = 0.3, |
159 | wall = 3, |
160 | arms = 3, |
161 | layer_height = 0.15) { |
cc410ed6 |
162 | thicker_thickness = (bearing_thickness > weight_thickness) ? |
163 | bearing_thickness : weight_thickness; |
164 | calculated_height = thicker_thickness + 2 * wall; |
165 | layers = 2 * ceil(ceil(calculated_height / layer_height) / 2); |
166 | actual_height = layers * layer_height; |
167 | round_radius = actual_height / 2; |
168 | |
5f8325d2 |
169 | /* rounding the outside edge of the spinner with a semi-circle leads |
170 | to a shape that an overhang on the second layer several times the |
171 | thickness of a printed extrusion width. |
172 | |
173 | rather than using a full semi-circle, this code aims to use just the |
174 | portion in the middle, where the overhang is less severe */ |
e1a02727 |
175 | old_start = 0; |
176 | old_end = (layers / 2) - 1; |
177 | |
5f8325d2 |
178 | /* add one to have some thickness all around weight holes |
179 | for first layer */ |
5fdbde1b |
180 | new_start = old_end / 16 + 1; |
e1a02727 |
181 | new_end = old_end; |
182 | |
183 | old_range = old_end - old_start; |
184 | new_range = new_end - new_start; |
185 | |
186 | factor = new_range / old_range; |
187 | |
5f8325d2 |
188 | /* initial adjacent is adjusted to (new start - 1) to allow some |
189 | thickness all around weight holes on first layer */ |
190 | initial_adjacent = round_radius - ((new_start - 1) * layer_height); |
e1a02727 |
191 | initial_angle = acos(initial_adjacent / round_radius); |
192 | initial_round_extra = initial_adjacent * tan(initial_angle); |
5f8325d2 |
193 | |
194 | difference() { |
195 | mirrored([0, 0, 1]) { |
196 | for(layer = [0 : (layers / 2) - 1]) { |
197 | translate([0, 0, layer * layer_height - actual_height / 2]) { |
198 | linear_extrude(height = layer_height) { |
199 | new_layer = (layer - old_start) * factor + new_start; |
200 | adjacent = round_radius - (new_layer * layer_height); |
201 | angle = acos(adjacent / round_radius); |
202 | round_extra = adjacent * tan(angle) - initial_round_extra; |
203 | spin_slice(weight_radius, |
204 | bearing_radius, |
205 | round_extra, |
206 | wall, |
207 | arms); } } } } |
208 | cylinder(h = actual_height + 0.1, |
209 | r = bearing_radius - bearing_lip_overhang, |
210 | center = true); |
5fdbde1b |
211 | cylinder(h = bearing_thickness + 0.05, |
212 | r = bearing_radius + 0.15, |
5f8325d2 |
213 | center = true); |
214 | for(arm = [0 : arms - 1]) { |
215 | rotate(arm * (360 / arms)) { |
216 | translate([bearing_radius + wall + weight_radius, 0]) { |
217 | cylinder(h = actual_height + 0.1, |
218 | r = weight_radius - weight_lip_overhang, |
219 | center = true); |
5fdbde1b |
220 | cylinder(h = weight_thickness + 0.05, |
221 | r = weight_radius + 0.15, |
5f8325d2 |
222 | center = true); } } } } } |
818dd661 |
223 | |
1dc634e1 |
224 | module spin_donut(weight_radius, |
225 | weight_thickness, |
226 | bearing_radius, |
227 | bearing_thickness, |
228 | weight_lip_overhang, |
229 | bearing_lip_overhang, |
230 | wall, |
231 | arms) { |
232 | thicker_thickness = (bearing_thickness > weight_thickness) |
233 | ? bearing_thickness : weight_thickness; |
234 | height = thicker_thickness + wall * 2; |
235 | |
236 | center_to_arm_center = bearing_radius + wall + weight_radius; |
237 | |
238 | jelly_filled(height, bearing_radius); |
239 | for(arm = [0 : arms]) { |
240 | rotate(arm * (360 / arms)) { |
241 | translate([center_to_arm_center, 0, 0]) { |
242 | jelly_filled(height, weight_radius); } } } } |
243 | |
818dd661 |
244 | /* |
245 | This file is part of 3d-printables. |
246 | |
247 | 3d-printables is free software: you can redistribute it and/or modify |
248 | it under the terms of the GNU Affero General Public License as published by |
249 | the Free Software Foundation, either version 3 of the License, or |
250 | (at your option) any later version. |
251 | |
252 | 3d-printables is distributed in the hope that it will be useful, |
253 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
254 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
255 | GNU Affero General Public License for more details. |
256 | |
257 | You should have received a copy of the GNU Affero General Public License |
258 | along with challenge-bot. If not, see <http://www.gnu.org/licenses/>. |
259 | */ |