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1 | /* GNU AGPLv3 (or later at your option) |
2 | see bottom for more license info. |
3 | please do not remove this notice. */ |
4 | |
5 | /* measurements from misumi's 3030 aluminum extrusion data sheet |
6 | https://us.misumi-ec.com/pdf/fa/2012/p2_0545.pdf */ |
7 | |
8 | //$fn = 30; // use this while editing |
9 | $fn = 100; // use this for generating STL |
10 | |
11 | foot_height = 18; |
12 | foot_length = 20; |
13 | wall_width = 2; |
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14 | nub_depth = 4; |
15 | |
16 | fudge = 0.1; |
17 | //fudge = 0.0; |
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18 | |
19 | // 3030 dimensions |
20 | x = 30; // adding a little because printers aren't perfect |
21 | y = 30; // adding a little because printers aren't perfect |
22 | opening_width = 8; |
23 | |
24 | outer_block = (30 - 16.5) / 2; |
25 | wall = 2; |
26 | |
27 | module ring(outer_radius, wall_width) { |
28 | difference() { |
29 | circle(outer_radius); |
30 | circle(outer_radius - wall_width); } } |
31 | |
32 | module fillet(r) { |
33 | offset(-r) { |
34 | offset(r) { |
35 | children(); } } } |
36 | |
37 | module round_corners(r) { |
38 | fillet(r) { fillet(-r) { children(); } } } |
39 | |
40 | module half_foot_2d() { |
41 | // outer ring |
42 | difference() { |
43 | ring(foot_height + wall_width, wall_width); |
44 | square(foot_height + wall_width); |
45 | rotate(-45) { |
46 | square(foot_height + wall_width); } } |
47 | // upper connector, vertical 3030 holder |
48 | translate([-wall_width, -wall_width]) { |
49 | square([wall_width, foot_height + wall_width]); } |
50 | // upper connecter, horizontal 3030 holder |
51 | translate([-wall_width, -wall_width]) { |
52 | square([wall_width + x / 2, wall_width]); } |
53 | // bottom connector |
54 | translate([cos(45) * foot_height, |
55 | -(sin(45) * foot_height + wall_width)]) { |
56 | square([x / 2 - cos(45) * foot_height, wall_width]); } |
57 | // bottom nub, goes into bottom 3030 opening |
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58 | translate([(x - opening_width) / 2, 0]) { |
59 | square([opening_width / 2, nub_depth]); } |
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60 | // side nub, goes into side 3030 openings |
61 | a = opening_width; |
62 | b = foot_height + wall_width - (y - opening_width) / 2; |
63 | side_nub_length = (a < b) ? a : b; |
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64 | translate([0, (y - opening_width) / 2 + fudge]) { |
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65 | square([nub_depth, side_nub_length - fudge]); } } |
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66 | |
67 | module foot_2d() { |
68 | round_corners(wall_width / 2.1) { |
69 | translate([-x / 2, 0, 0]) { |
70 | half_foot_2d(); } |
71 | translate([x / 2, 0, 0]) { |
72 | mirror() { |
73 | half_foot_2d(); } } } } |
74 | |
75 | module foot() { |
76 | rotate(a = 0, v = [1, 0, 0]) { |
77 | linear_extrude(height = foot_length) { |
78 | foot_2d(); } } } |
79 | |
80 | // half_foot_2d(); |
81 | // foot_2d(); |
82 | foot(); |
83 | |
84 | /* |
85 | This file is part of 3d-printables. |
86 | |
87 | 3d-printables is free software: you can redistribute it and/or modify |
88 | it under the terms of the GNU Affero General Public License as published by |
89 | the Free Software Foundation, either version 3 of the License, or |
90 | (at your option) any later version. |
91 | |
92 | 3d-printables is distributed in the hope that it will be useful, |
93 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
94 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
95 | GNU Affero General Public License for more details. |
96 | |
97 | You should have received a copy of the GNU Affero General Public License |
98 | along with challenge-bot. If not, see <http://www.gnu.org/licenses/>. |
99 | */ |