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1 | /* GNU AGPLv3 (or later at your option) |
2 | see bottom for more license info */ |
3 | |
4 | /* measurements from misumi's 3030 aluminum extrusion data sheet |
5 | https://us.misumi-ec.com/pdf/fa/2012/p2_0545.pdf |
6 | */ |
7 | |
8 | x = 30; |
9 | y = 30; |
10 | diagonal = sqrt(pow(30/2, 2) + pow(30/2, 2)); |
11 | opening_width = 8; |
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12 | inner_block = 12; |
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13 | |
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14 | outer_block = (30 - 16.5) / 2; |
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15 | wall = 2; |
16 | |
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17 | $fn = 100; |
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18 | |
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19 | module 3030_arm_half(){ |
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20 | // inner block |
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21 | square(inner_block / 2); |
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22 | |
23 | // diagonal arms connecting inner block to outer blocks |
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24 | rotate(45) { |
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25 | square([diagonal - wall, wall / 2]); } |
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26 | |
27 | // outer block, without the wall part since wall has rounded corner |
28 | translate([x / 2 - outer_block, y / 2 - outer_block]) { |
29 | square(outer_block - wall); } |
30 | |
31 | // outer arms covering the opening |
32 | translate([(opening_width + wall) / 2, y / 2 - wall]) { |
33 | square([(x - opening_width - wall) / 2 - wall, wall]); } |
34 | // rounded part at entrace to inside |
35 | translate([(opening_width + wall) / 2, (y - wall) / 2]){ |
36 | circle(d = wall); } |
37 | // rounded part around outside of extrusion |
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38 | corner_squish = 0.1; |
39 | translate([x / 2 - wall + corner_squish, y / 2 - wall + corner_squish]) { |
40 | circle(wall - corner_squish); } } |
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41 | |
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42 | module 3030_profile(){ |
43 | arms = 4; |
44 | for(arm = [0:arms - 1]) { |
45 | rotate(arm * 360 / arms) { |
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46 | 3030_arm_half(); |
47 | mirror(){ 3030_arm_half(); } } } } |
48 | |
49 | module 3030_sleeve_profile(){ |
50 | difference() { |
51 | square(40, true); |
52 | minkowski() { |
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53 | 3030_profile(); |
54 | circle(0.2);} } } |
55 | |
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56 | module fillet(r) { |
57 | offset(-r) { |
58 | offset(r) { |
59 | children(); } } } |
60 | |
61 | module upper_arm_profile(){ |
62 | square(40, true); |
63 | |
64 | a = [20, -20]; |
65 | b = [34.1, 0]; |
66 | c = [6.25, 20]; |
67 | points = [a, b, c]; |
68 | |
69 | arm_radius = 11.35; |
70 | arm_center = [61.8, 140.4]; |
71 | hull() { |
72 | polygon(points); |
73 | translate(arm_center) { |
74 | circle(arm_radius); } } } |
75 | |
76 | module forearm_profile() { |
77 | fillet(-5) { |
78 | difference() { |
79 | upper_arm_profile(); |
80 | translate([-20, -20]) { |
81 | square(151); } } } } |
82 | |
83 | module upper_arm_hull() { |
84 | linear_extrude(height = 15) { |
85 | upper_arm_profile(); } } |
86 | |
87 | module forearm_hull() { |
88 | linear_extrude(height = 120.5) { |
89 | forearm_profile(); } } |
90 | |
91 | module shoulder_hull() { |
92 | translate([-20, -20, 0]) { |
93 | cube([40, 40, 35]); } } |
94 | |
95 | shoulder_hull(); |
96 | upper_arm_hull(); |
97 | forearm_hull(); |
98 | |
99 | original_spool_holder(); |
100 | |
101 | module original_forearm_profile() { |
102 | %projection(true) { |
103 | translate([-315, 0, -80]) { |
104 | import("Spool-holder.stl"); } } } |
105 | |
106 | module original_upper_arm_profile() { |
107 | %projection(true) { |
108 | translate([-315, 0, -2]) { |
109 | import("Spool-holder.stl"); } } } |
110 | |
111 | module original_spool_holder() { |
112 | %translate([-315, 0, 0]) { |
113 | import("Spool-holder.stl"); } } |
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114 | |
115 | /* |
116 | This file is part of 3d-printables. |
117 | |
118 | 3d-printables is free software: you can redistribute it and/or modify |
119 | it under the terms of the GNU Affero General Public License as published by |
120 | the Free Software Foundation, either version 3 of the License, or |
121 | (at your option) any later version. |
122 | |
123 | 3d-printables is distributed in the hope that it will be useful, |
124 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
125 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
126 | GNU Affero General Public License for more details. |
127 | |
128 | You should have received a copy of the GNU Affero General Public License |
129 | along with challenge-bot. If not, see <http://www.gnu.org/licenses/>. |
130 | */ |