2 Copyright 2016 Daniel Watson
3 See the end of the file for license conditions.
6 // GNU AGPLv3 (or later at your option)
7 // project available here:
8 // https://challenge-bot.com/ */
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
20 * * TODO make hole for thing between cans
21 * * TODO make hole for screws in corners of pcb
26 sonar_diameter_measured
= 15.82;
27 sonar_diameter_print_fudge
= 0.4;
28 sonar_diameter
= sonar_diameter_measured
+ sonar_diameter_print_fudge
;
29 sonar_radius
= sonar_diameter
/ 2;
31 between_sonar_cans
= 10.82;
32 between_sonar_centers
= sonar_diameter
+ between_sonar_cans
;
34 // the sonar cylinders are placed on the pcb at slightly different positions
35 // from one sensor to the next, so this allows for that variance.
36 between_sonar_centers_variation
= 2;
40 screw_diameter_measured
= 3.45;
41 screw_radius_measured
= screw_diameter_measured
/ 2;
42 screw_radius_print_fudge
= 0.4;
43 screw_radius
= screw_radius_measured
+ screw_radius_print_fudge
;
45 sonar_binder_clip_holder_height
= 3;
52 binder clip holder outline
53 binder clip holder holes
54 sonar binder clip joiner
57 module
sonar_holder_holes_2d(sonar_radius
,
58 between_sonar_centers
,
59 between_sonar_centers_variation
) {
62 translate([between_sonar_centers_variation
, 0]){
63 circle(sonar_radius
); } }
64 translate([between_sonar_centers
, 0]) {
65 circle(sonar_radius
); } }
67 module
sonar_holder_outline_2d(holder_radius
,
68 between_sonar_centers
) {
69 smaller_radius
= holder_radius
/ 4;
70 inside_radius
= holder_radius
- smaller_radius
;
72 offset(r
= smaller_radius
){
73 square([inside_radius
* 2, inside_radius
* 2], center
=true); }
74 translate([between_sonar_centers
, 0]) {
75 circle(holder_radius
); } } }
77 module
sonar_holder_2d(holder_radius
,
78 between_sonar_centers
,
80 between_sonar_centers_variation
) {
82 sonar_holder_outline_2d(holder_radius
,
83 between_sonar_centers
);
84 sonar_holder_holes_2d(sonar_radius
,
85 between_sonar_centers
,
86 between_sonar_centers_variation
); } }
88 module
binder_clip_holder_holes_2d(screw_radius
) {
89 circle(screw_radius
); }
91 module
binder_clip_holder_outline_2d(holder_radius
) {
92 smaller_radius
= holder_radius
/ 4;
93 inside_radius
= holder_radius
- smaller_radius
;
94 offset(r
= smaller_radius
){
95 square([inside_radius
* 2, inside_radius
* 2], center
=true); } }
97 module
binder_clip_holder_2d(holder_radius
,
100 binder_clip_holder_outline_2d(holder_radius
);
101 binder_clip_holder_holes_2d(screw_radius
); } }
103 module
binder_clip_holder(holder_radius
,
105 sonar_binder_clip_holder_height
) {
106 linear_extrude(height
= sonar_binder_clip_holder_height
) {
107 binder_clip_holder_2d(holder_radius
,
110 module
sonar_binder_clip_holder_2d(sonar_radius
,
111 between_sonar_centers
,
112 between_sonar_centers_variation
,
115 holder_radius
= sonar_radius
+ wall_thickness
;
116 sonar_holder_2d(holder_radius
,
117 between_sonar_centers
,
119 between_sonar_centers_variation
);
120 arm_length
= between_sonar_centers
+ 2 * holder_radius
;
122 translate([0, -holder_radius
]) {
123 square([arm_length
, holder_radius
* 2]); }
124 sonar_holder_outline_2d(holder_radius
, between_sonar_centers
);
125 translate([arm_length
, 0]) {
126 binder_clip_holder_outline_2d(holder_radius
); } }
127 translate([arm_length
, 0]) {
128 binder_clip_holder_2d(holder_radius
, screw_radius
); } }
130 module
sonar_binder_clip_holder(sonar_radius
,
131 between_sonar_centers
,
132 between_sonar_centers_variation
,
135 sonar_binder_clip_holder_height
) {
136 linear_extrude(height
= sonar_binder_clip_holder_height
) {
137 sonar_binder_clip_holder_2d(sonar_radius
,
138 between_sonar_centers
,
139 between_sonar_centers_variation
,
144 This file is part of challenge-bot.
146 Challenge-bot is free software: you can redistribute it and/or modify
147 it under the terms of the GNU Affero General Public License as published by
148 the Free Software Foundation, either version 3 of the License, or
149 (at your option) any later version.
151 GNU Affero Emacs is distributed in the hope that it will be useful,
152 but WITHOUT ANY WARRANTY; without even the implied warranty of
153 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
154 GNU Affero General Public License for more details.
156 You should have received a copy of the GNU Affero General Public License
157 along with challenge-bot. If not, see <http://www.gnu.org/licenses/>.