separate out binder clip holder from sonar holder
[challenge-bot] / 3d-printables / sonar-binder-clip-holder-data.scad
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
19 $fn = 50;
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
26 between_sonar_cans = 10.82;
27 between_sonar_centers = sonar_diameter + between_sonar_cans;
28
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
33 wall_thickness = 3;
34
35 screw_radius_measured = 2.8;
36 screw_radius_print_fudge = 0.3;
37 screw_radius = screw_radius_measured + screw_radius_print_fudge;
38
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;
53 holder_diameter = holder_radius * 2;
54 hull() {
55 circle(holder_radius);
56 translate([between_sonar_centers - sonar_radius - wall_thickness,
57 -holder_radius]) {
58 square(holder_diameter); } } }
59
60 module sonar_holder(sonar_radius,
61 between_sonar_centers,
62 between_sonar_centers_variation,
63 wall_thickness) {
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,
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); } }
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 */