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1 | // challenge-bot |
2 | // GNU AGPLv3 (or later at your option) |
3 | // project available at these locations: |
4 | // https://gitorious.org/ozzloy/challenge-bot |
5 | // https://github.com/waynegramlich/challenge-bot |
6 | |
7 | /* |
8 | this holds an hc-sr04 sonar sensor to a 3/16 inch deck. |
9 | http://fritzing.org/projects/hc-sr04-project |
10 | it can hold the sonar sensor either facing down, or forwards. |
11 | when facing down, it can detect if it passes over the edge of a table. |
12 | when facing forwards, it can detect and follow something in front of it. |
13 | */ |
14 | |
15 | $fn = 60; |
16 | |
78a38e00 |
17 | include <oshw-data.scad> |
18 | |
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19 | // 3/16 inch in mm deck_depth = 4.7625; |
20 | // 1/4 inch in mm = 6.35 |
21 | // subtract a little to be a squeeze fit |
22 | deck_depth = 4.7625 - 0.4; |
23 | // sonar sensor measurements taken with calipers: |
24 | // 10.82 in between, 42.33 outside, 15.82 diameter |
25 | // measured diameter of 15.82 with calipers, |
26 | // but when printed ends up being too small, so add some |
27 | sonar_diameter = 15.82 + 0.4; |
28 | sonar_radius = sonar_diameter / 2; |
29 | sonar_height = 13.8; |
30 | between_sonar_centers = sonar_diameter + 10.82; |
31 | // the sonar cylinders are placed on the pcb at slightly different positions |
32 | // from one sensor to the next, so this allows for that variance. |
33 | between_sonar_centers_variance = 2; |
34 | // keep at least this much plastic surrounding the sonar cylinder on all sides |
35 | buffer = 3; |
36 | sonar_holder_length = buffer + between_sonar_centers + sonar_diameter + buffer; |
37 | sonar_holder_width = buffer + sonar_diameter + buffer; |
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38 | |
39 | // 3/16 inch in mm deck_depth = 4.7625; |
40 | // 1/4 inch in mm = 6.35 |
41 | // subtract a little to be a squeeze fit |
42 | deck_depth = 4.7625 - 0.4; |
43 | // sonar sensor measurements taken with calipers: |
44 | // 10.82 in between, 42.33 outside, 15.82 diameter |
45 | // measured diameter of 15.82 with calipers, |
46 | // but when printed ends up being too small, so add some |
47 | sonar_diameter = 15.82 + 0.4; |
48 | sonar_radius = sonar_diameter / 2; |
49 | sonar_height = 13.8; |
50 | between_sonar_centers = sonar_diameter + 10.82; |
51 | // the sonar cylinders are placed on the pcb at slightly different positions |
52 | // from one sensor to the next, so this allows for that variance. |
53 | between_sonar_centers_variance = 2; |
54 | // keep at least this much plastic surrounding the sonar cylinder on all sides |
55 | buffer = 3; |
56 | sonar_holder_length = buffer + between_sonar_centers + sonar_diameter + buffer; |
57 | sonar_holder_width = buffer + sonar_diameter + buffer; |
58 | // sonar_holder_depth is deck_depth minus a little bit to make arm fit |
59 | // into deck holder |
60 | sonar_holder_depth = deck_depth - 0.7875; |
61 | |
62 | deck_holder_length = sonar_holder_depth * 2 + deck_depth + 15; |
63 | |
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64 | module deck_holder() { |
65 | deck_holder_width = sonar_holder_width - deck_depth; |
66 | deck_holder_height = sonar_holder_depth * 2 + deck_depth; |
67 | linear_extrude(height = deck_holder_width) { |
68 | difference() { |
69 | square([deck_holder_length, deck_holder_height]); |
70 | translate([sonar_holder_depth - 0.15, sonar_holder_depth - 0.15]) { |
71 | square(deck_depth + 0.3); } |
72 | translate([deck_holder_height, sonar_holder_depth - 0.3]) { |
73 | square([deck_holder_length - (deck_holder_height), |
74 | deck_depth + 0.6]); } } } |
75 | translate([deck_holder_length - oshw_dy * 0.05, 0, deck_holder_width / 2]) |
76 | scale([0.1, 1, 0.1]) |
77 | rotate(v = [1, 0, 0], a = 90) |
78 | rotate(90) |
79 | linear_extrude(height = 0.5) |
80 | oshw(); |
81 | translate([deck_holder_length - oshw_dy * 0.05, |
82 | deck_holder_height + 0.5, |
83 | deck_holder_width / 2]) |
84 | rotate(v = [1, 0, 0], a = 90) |
85 | rotate(90) |
86 | scale([0.1, 0.1, 1]) |
87 | linear_extrude(height = 0.5) |
88 | oshw(); } |