d899cf8b |
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; |
d899cf8b |
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 | |
8d53fefd |
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 | |
bfdc15e7 |
35 | screw_radius_measured = 2.8; |
36 | screw_radius_print_fudge = 0.3; |
37 | screw_radius = screw_radius_measured + screw_radius_print_fudge; |
38 | |
d7732ded |
39 | module sonar_sensors_2d(sonar_radius, |
40 | between_sonar_centers, |
41 | between_sonar_centers_variation) { |
42 | hull(){ |
43 | circle(sonar_radius); |
44 | translate([between_sonar_centers_variation, 0]){ |
45 | circle(sonar_radius); } } |
46 | translate([between_sonar_centers, 0]) { |
47 | circle(sonar_radius); } } |
48 | |
49 | module sonar_holder_outline_2d(sonar_radius, |
50 | between_sonar_centers, |
51 | wall_thickness) { |
52 | holder_radius = sonar_radius + wall_thickness; |
bfdc15e7 |
53 | holder_diameter = holder_radius * 2; |
d7732ded |
54 | hull() { |
55 | circle(holder_radius); |
e04f30fb |
56 | translate([between_sonar_centers - sonar_radius - wall_thickness, |
57 | -holder_radius]) { |
58 | square(holder_diameter); } } } |
d7732ded |
59 | |
e04f30fb |
60 | module sonar_holder(sonar_radius, |
61 | between_sonar_centers, |
62 | between_sonar_centers_variation, |
63 | wall_thickness) { |
d7732ded |
64 | difference() { |
65 | sonar_holder_outline_2d(sonar_radius, |
66 | between_sonar_centers, |
67 | wall_thickness); |
68 | sonar_sensors_2d(sonar_radius, |
69 | between_sonar_centers, |
e04f30fb |
70 | between_sonar_centers_variation); } } |
71 | |
72 | module binder_clip_holder(binder_clip_holder_length, |
73 | screw_radius, |
74 | holder_radius){ |
75 | difference() { |
76 | square([binder_clip_holder_length, holder_radius * 2]); |
77 | translate([binder_clip_holder_length - holder_radius, holder_radius]) { |
78 | circle(screw_radius); } } } |
79 | |
80 | module sonar_binder_clip_holder(sonar_radius, |
81 | between_sonar_centers, |
82 | between_sonar_centers_variation, |
83 | wall_thickness) { |
84 | sonar_holder(sonar_radius, |
85 | between_sonar_centers, |
86 | between_sonar_centers_variation, |
87 | wall_thickness); |
88 | holder_radius = sonar_radius + wall_thickness; |
89 | binder_clip_holder_length = 2 * holder_radius; |
90 | translate([between_sonar_centers + holder_radius, -holder_radius]){ |
91 | binder_clip_holder(binder_clip_holder_length, |
92 | screw_radius, |
93 | holder_radius); } } |
d899cf8b |
94 | |
95 | /* |
96 | This file is part of challenge-bot. |
97 | |
98 | Challenge-bot is free software: you can redistribute it and/or modify |
99 | it under the terms of the GNU Affero General Public License as published by |
100 | the Free Software Foundation, either version 3 of the License, or |
101 | (at your option) any later version. |
102 | |
103 | GNU Affero Emacs is distributed in the hope that it will be useful, |
104 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
105 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
106 | GNU Affero General Public License for more details. |
107 | |
108 | You should have received a copy of the GNU Affero General Public License |
109 | along with challenge-bot. If not, see <http://www.gnu.org/licenses/>. |
110 | */ |