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
9 // 3/16 inch in mm deck_depth = 4.7625;
10 // 1/4 inch in mm = 6.35
11 // subtract a little to be a squeeze fit
12 deck_depth
= 4.7625 - 0.4;
13 // sonar sensor measurements taken with calipers:
14 // 10.82 in between, 42.33 outside, 15.82 diameter
15 // measured diameter of 15.82 with calipers,
16 // but when printed ends up being too small, so add some
17 sonar_diameter
= 15.82 + 0.4;
18 sonar_radius
= sonar_diameter
/ 2;
20 between_sonar_centers
= sonar_diameter
+ 10.82;
21 // the sonar cylinders are placed on the pcb at slightly different positions
22 // from one sensor to the next, so this allows for that variance.
23 between_sonar_centers_variance
= 2;
24 // keep at least this much plastic surrounding the sonar cylinder on all sides
26 sonar_holder_length
= buffer
+ between_sonar_centers
+ sonar_diameter
+ buffer
;
27 sonar_holder_width
= buffer
+ sonar_diameter
+ buffer
;
28 // sonar_holder_depth is deck_depth minus a little bit to make arm fit
30 sonar_holder_depth
= deck_depth
- 0.7875;
32 deck_holder_length
= sonar_holder_depth
* 2 + deck_depth
+ 15;
35 translate([between_sonar_centers
/ 2, 0, 0]){
36 cylinder(r
= sonar_radius
, h
= sonar_height
);}
37 // for the variance with which the physical sonar cylinders are placed
38 translate([between_sonar_centers
/ 2 - between_sonar_centers_variance
, 0, 0]){
39 cylinder(r
= sonar_radius
, h
= sonar_height
);
40 translate([0, -sonar_radius
, 0]){
41 cube([between_sonar_centers_variance
, sonar_diameter
, sonar_height
]);}}
42 translate([-between_sonar_centers
/ 2, 0, 0]){
43 cylinder(r
= sonar_radius
, h
= sonar_height
);}}
45 module
sonar_holder(){
46 elbow_length
= deck_depth
- 0.5;
48 cube([sonar_holder_length
, sonar_holder_width
, sonar_holder_depth
]);
49 translate([sonar_holder_length
/ 2, sonar_holder_width
/ 2, -0.05]){
51 translate([sonar_holder_length
, 0, 0]){
52 cube([elbow_length
, deck_depth
, sonar_holder_depth
]);
53 translate([elbow_length
, 0, 0]){
54 linear_extrude(height
= sonar_holder_depth
){
56 [sonar_holder_depth
, 0],
57 [sonar_holder_depth
, sonar_holder_width
/ 2],
59 sonar_holder_width
/ 2 + sonar_holder_depth
]]);}
60 translate([0, (sonar_holder_width
+ sonar_holder_depth
) / 2, 0]){
61 cube([sonar_holder_depth
/ 2,
62 (sonar_holder_width
- sonar_holder_depth
) / 2 + 0.8,
63 sonar_holder_depth
]);}
64 translate([-1.7, sonar_holder_width
+ 0.8, 0]){
65 linear_extrude(height
= sonar_holder_depth
){
67 [sonar_holder_depth
/ 2 + 1.7, 4],
68 [sonar_holder_depth
/ 2 + 1.7, 0]]);}}}}}
71 deck_holder_width
= sonar_holder_width
- deck_depth
;
72 linear_extrude(height
= deck_holder_width
){
74 square([deck_holder_length
, sonar_holder_depth
* 2 + deck_depth
]);
75 translate([sonar_holder_depth
, sonar_holder_depth
]){
77 translate([sonar_holder_depth
* 2 + deck_depth
, sonar_holder_depth
]){
78 square([deck_holder_length
- (sonar_holder_depth
* 2 + deck_depth
),
82 translate([0, sonar_holder_depth
* 2 + deck_depth
+ 2, 0]){