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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 | |
| 17 | $fn = 40; |
| 18 | |
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19 | module 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 | translate([x / 2 - wall, y / 2 - wall]) { |
| 39 | circle(wall); } } |
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40 | |
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41 | module 3030_profile(){ |
| 42 | arms = 4; |
| 43 | for(arm = [0:arms - 1]) { |
| 44 | rotate(arm * 360 / arms) { |
| 45 | arm_half(); |
| 46 | mirror(){ arm_half(); } } } } |
| 47 | |
| 48 | linear_extrude(height = 10){ |
| 49 | difference(){ |
| 50 | minkowski(){ |
| 51 | square(30, true); |
| 52 | circle(10);} |
| 53 | minkowski(){ |
| 54 | 3030_profile(); |
| 55 | circle(0.3);} } } |
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56 | |
| 57 | /* |
| 58 | This file is part of 3d-printables. |
| 59 | |
| 60 | 3d-printables is free software: you can redistribute it and/or modify |
| 61 | it under the terms of the GNU Affero General Public License as published by |
| 62 | the Free Software Foundation, either version 3 of the License, or |
| 63 | (at your option) any later version. |
| 64 | |
| 65 | 3d-printables is distributed in the hope that it will be useful, |
| 66 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 67 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 68 | GNU Affero General Public License for more details. |
| 69 | |
| 70 | You should have received a copy of the GNU Affero General Public License |
| 71 | along with challenge-bot. If not, see <http://www.gnu.org/licenses/>. |
| 72 | */ |
projects / ozzloy@gmail.com / 3d-printables / blame