3d90aff0 |
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 | // use $fn = 20 while developing, 100 when about to print |
8 | // 20 will make previews fast |
9 | // 100 will make printing smooth |
10 | $fn = 100; |
11 | |
12 | qr_size = 45; |
13 | qr_height = 2; |
14 | |
15 | wall_width = 3; |
16 | |
17 | wheel_width = 9; |
18 | wheel_radius = sqrt(2 * pow(qr_size / 2, 2)) + wall_width / 2; |
19 | |
20 | motor_shaft_radius = 3.7; |
21 | motor_shaft_flat_width = 4.8; |
22 | |
23 | tread_radius = 4 / 2; |
24 | |
25 | module mounting_screw_flat() { |
26 | circle(0.9); } |
27 | |
28 | module motor_shaft_flat(radius, flat_width) { |
29 | intersection() { |
30 | circle(radius); |
31 | square([flat_width, radius * 2], center = true); } } |
32 | |
33 | module motor_shaft(radius, |
34 | flat_width, |
35 | shaft_length) { |
36 | linear_extrude(height = shaft_length) { |
37 | motor_shaft_flat(radius, flat_width); } } |
38 | |
39 | module rim(radius, wall_width, wheel_width) { |
40 | linear_extrude(height = wheel_width) { |
41 | difference() { |
42 | circle(radius); |
43 | circle(radius - wall_width); } } } |
44 | |
45 | module motor_shaft_holder_flat(radius, flat_width, wall_width) { |
46 | difference() { |
47 | motor_shaft_flat(radius + wall_width, |
48 | flat_width + wall_width); |
49 | motor_shaft_flat(radius, flat_width); } } |
50 | |
51 | module motor_shaft_holder(radius, flat_width, wall_width, height) { |
52 | linear_extrude(height = height) { |
53 | motor_shaft_holder_flat(radius, flat_width, wall_width); } } |
54 | |
55 | module tread(wheel_radius, tread_radius) { |
56 | rotate_extrude(convexity = 10) { |
57 | translate([wheel_radius, 0]) { |
58 | circle(tread_radius); } } } |
59 | |
60 | module wheel_black(radius, |
61 | width, |
62 | shaft_radius, |
63 | shaft_flat_width, |
64 | wall_width, |
65 | tread_radius) { |
66 | color("black") { |
67 | difference() { |
68 | rim(radius, wall_width, width); |
69 | translate([0, 0, width / 2]) { |
70 | tread(radius, tread_radius); } } |
71 | linear_extrude(height = qr_height) { |
72 | difference() { |
73 | qr_black_flat(); |
74 | mounting_screw_flat(); } } |
75 | translate([0, 0, qr_height]) { |
76 | motor_shaft_holder(shaft_radius, |
77 | shaft_flat_width, |
78 | wall_width, |
79 | width - qr_height); } } } |
80 | |
81 | module wheel_white() { |
82 | color("white") { |
83 | linear_extrude(height = qr_height) { |
84 | difference() { |
85 | qr_white_flat(); |
86 | mounting_screw_flat(); } } } } |
87 | |
88 | module wheel(radius, |
89 | width, |
90 | shaft_radius, |
91 | shaft_flat_width, |
92 | wall_width, |
93 | tread_radius) { |
94 | wheel_black(radius, |
95 | width, |
96 | shaft_radius, |
97 | shaft_flat_width, |
98 | wall_width, |
99 | tread_radius); |
100 | wheel_white(); } |
101 | |
102 | module wheel_solid(radius, |
103 | width, |
104 | shaft_radius, |
105 | shaft_flat_width, |
106 | wall_width, |
107 | tread_radius) { |
108 | difference() { |
109 | rim(radius, wall_width * 2, width); |
110 | translate([0, 0, width / 2]) { |
111 | tread(radius, tread_radius); } } |
112 | linear_extrude(height = qr_height) { |
113 | difference() { |
114 | square(qr_size, center = true); |
115 | mounting_screw_flat(); } } |
116 | translate([0, 0, qr_height]) { |
117 | motor_shaft_holder(shaft_radius, |
118 | shaft_flat_width, |
119 | wall_width, |
120 | width - qr_height); } } |