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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; |
14 | |
15 | // 3030 dimensions |
16 | x = 30; // adding a little because printers aren't perfect |
17 | y = 30; // adding a little because printers aren't perfect |
18 | opening_width = 8; |
19 | |
20 | outer_block = (30 - 16.5) / 2; |
21 | wall = 2; |
22 | |
23 | module ring(outer_radius, wall_width) { |
24 | difference() { |
25 | circle(outer_radius); |
26 | circle(outer_radius - wall_width); } } |
27 | |
28 | module fillet(r) { |
29 | offset(-r) { |
30 | offset(r) { |
31 | children(); } } } |
32 | |
33 | module round_corners(r) { |
34 | fillet(r) { fillet(-r) { children(); } } } |
35 | |
36 | module half_foot_2d() { |
37 | // outer ring |
38 | difference() { |
39 | ring(foot_height + wall_width, wall_width); |
40 | square(foot_height + wall_width); |
41 | rotate(-45) { |
42 | square(foot_height + wall_width); } } |
43 | // upper connector, vertical 3030 holder |
44 | translate([-wall_width, -wall_width]) { |
45 | square([wall_width, foot_height + wall_width]); } |
46 | // upper connecter, horizontal 3030 holder |
47 | translate([-wall_width, -wall_width]) { |
48 | square([wall_width + x / 2, wall_width]); } |
49 | // bottom connector |
50 | translate([cos(45) * foot_height, |
51 | -(sin(45) * foot_height + wall_width)]) { |
52 | square([x / 2 - cos(45) * foot_height, wall_width]); } |
53 | // bottom nub, goes into bottom 3030 opening |
54 | translate([(x - opening_width) / 2 + 0.2, 0]) { |
55 | square([opening_width / 2 - 0.2, wall_width * 2]); } |
56 | // side nub, goes into side 3030 openings |
57 | a = opening_width; |
58 | b = foot_height + wall_width - (y - opening_width) / 2; |
59 | side_nub_length = (a < b) ? a : b; |
60 | fudge = 0.3; |
61 | translate([0, (y - opening_width) / 2 + fudge]) { |
62 | square([wall_width, side_nub_length - fudge]); } } |
63 | |
64 | module foot_2d() { |
65 | round_corners(wall_width / 2.1) { |
66 | translate([-x / 2, 0, 0]) { |
67 | half_foot_2d(); } |
68 | translate([x / 2, 0, 0]) { |
69 | mirror() { |
70 | half_foot_2d(); } } } } |
71 | |
72 | module foot() { |
73 | rotate(a = 0, v = [1, 0, 0]) { |
74 | linear_extrude(height = foot_length) { |
75 | foot_2d(); } } } |
76 | |
77 | // half_foot_2d(); |
78 | // foot_2d(); |
79 | foot(); |
80 | |
81 | /* |
82 | This file is part of 3d-printables. |
83 | |
84 | 3d-printables is free software: you can redistribute it and/or modify |
85 | it under the terms of the GNU Affero General Public License as published by |
86 | the Free Software Foundation, either version 3 of the License, or |
87 | (at your option) any later version. |
88 | |
89 | 3d-printables is distributed in the hope that it will be useful, |
90 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
91 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
92 | GNU Affero General Public License for more details. |
93 | |
94 | You should have received a copy of the GNU Affero General Public License |
95 | along with challenge-bot. If not, see <http://www.gnu.org/licenses/>. |
96 | */ |