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1 | /* |
2 | Copyright 2016 Daniel Watson |
3 | See the end of the file for license conditions. |
4 | */ |
5 | /* challenge-bot |
6 | // GNU AGPLv3 (or later at your option) |
7 | // project available here: |
8 | // https://challenge-bot.com/ */ |
9 | |
10 | /* |
11 | this holds an hc-sr04 sonar sensor to a 3/16 inch deck. |
12 | http://fritzing.org/projects/hc-sr04-project |
13 | it can hold the sonar sensor either facing down, or forwards. |
14 | when facing down, it can detect if it passes over the edge of a table. |
15 | when facing forwards, it can detect and follow something in front |
16 | of it. |
17 | */ |
18 | |
ba144414 |
19 | $fn = 50; |
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20 | |
21 | sonar_diameter_measured = 15.82; |
22 | sonar_diameter_print_fudge = 0.5; |
23 | sonar_diameter = sonar_diameter_measured + sonar_diameter_print_fudge; |
24 | sonar_radius = sonar_diameter / 2; |
25 | |
ba144414 |
26 | between_sonar_cans = 10.82; |
27 | between_sonar_centers = sonar_diameter + between_sonar_cans; |
28 | |
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29 | // the sonar cylinders are placed on the pcb at slightly different positions |
30 | // from one sensor to the next, so this allows for that variance. |
31 | between_sonar_centers_variation = 2; |
32 | |
d7732ded |
33 | wall_thickness = 3; |
34 | |
35 | module sonar_sensors_2d(sonar_radius, |
36 | between_sonar_centers, |
37 | between_sonar_centers_variation) { |
38 | hull(){ |
39 | circle(sonar_radius); |
40 | translate([between_sonar_centers_variation, 0]){ |
41 | circle(sonar_radius); } } |
42 | translate([between_sonar_centers, 0]) { |
43 | circle(sonar_radius); } } |
44 | |
45 | module sonar_holder_outline_2d(sonar_radius, |
46 | between_sonar_centers, |
47 | wall_thickness) { |
48 | holder_radius = sonar_radius + wall_thickness; |
49 | hull() { |
50 | circle(holder_radius); |
51 | translate([between_sonar_centers, 0]) { |
52 | circle(holder_radius); } } } |
53 | |
ba144414 |
54 | module sonar_binder_clip_holder(sonar_radius, |
d7732ded |
55 | between_sonar_centers, |
56 | between_sonar_centers_variation, |
57 | wall_thickness) { |
58 | difference() { |
59 | sonar_holder_outline_2d(sonar_radius, |
60 | between_sonar_centers, |
61 | wall_thickness); |
62 | sonar_sensors_2d(sonar_radius, |
63 | between_sonar_centers, |
64 | between_sonar_centers_variation); } } |
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65 | |
66 | /* |
67 | This file is part of challenge-bot. |
68 | |
69 | Challenge-bot is free software: you can redistribute it and/or modify |
70 | it under the terms of the GNU Affero General Public License as published by |
71 | the Free Software Foundation, either version 3 of the License, or |
72 | (at your option) any later version. |
73 | |
74 | GNU Affero Emacs is distributed in the hope that it will be useful, |
75 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
76 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
77 | GNU Affero General Public License for more details. |
78 | |
79 | You should have received a copy of the GNU Affero General Public License |
80 | along with challenge-bot. If not, see <http://www.gnu.org/licenses/>. |
81 | */ |