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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 | |
136c3fb0 |
7 | // use $fn = 20 while developing, 100 when about to print |
8 | // 20 will make previews fast |
9 | // 100 will make printing smooth |
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10 | $fn = 100; |
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11 | |
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12 | include <wheel-dimensions.scad> |
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13 | use <qr.scad> |
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14 | |
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15 | module mounting_screw_flat() { |
16 | circle(0.9); } |
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17 | |
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18 | module motor_shaft_flat(radius, flat_width) { |
19 | intersection() { |
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20 | circle(radius); |
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21 | square([flat_width, radius * 2], center = true); } } |
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22 | |
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23 | module motor_shaft(radius, |
24 | flat_width, |
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25 | shaft_length) { |
26 | linear_extrude(height = shaft_length) { |
27 | motor_shaft_flat(radius, flat_width); } } |
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28 | |
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29 | module rim(radius, wall_width, wheel_width) { |
30 | linear_extrude(height = wheel_width) { |
31 | difference() { |
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32 | circle(radius); |
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33 | circle(radius - wall_width); } } } |
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34 | |
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35 | module motor_shaft_holder_flat(radius, flat_width, wall_width) { |
36 | difference() { |
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37 | motor_shaft_flat(radius + wall_width, |
38 | flat_width + wall_width); |
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39 | motor_shaft_flat(radius, flat_width); } } |
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40 | |
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41 | module motor_shaft_holder(radius, flat_width, wall_width, height) { |
42 | linear_extrude(height = height) { |
43 | motor_shaft_holder_flat(radius, flat_width, wall_width); } } |
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44 | |
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45 | module tread(wheel_radius, tread_radius) { |
46 | rotate_extrude(convexity = 10) { |
47 | translate([wheel_radius, 0]) { |
48 | circle(tread_radius); } } } |
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49 | |
50 | module wheel_black(radius, |
51 | width, |
52 | shaft_radius, |
53 | shaft_flat_width, |
54 | wall_width, |
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55 | tread_radius) { |
56 | color("black") { |
57 | difference() { |
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58 | rim(radius, wall_width, width); |
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59 | translate([0, 0, width / 2]) { |
60 | tread(radius, tread_radius); } } |
61 | linear_extrude(height = qr_height) { |
62 | difference() { |
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63 | qr_black_flat(); |
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64 | mounting_screw_flat(); } } |
65 | translate([0, 0, qr_height]) { |
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66 | motor_shaft_holder(shaft_radius, |
67 | shaft_flat_width, |
68 | wall_width, |
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69 | width - qr_height); } } } |
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70 | |
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71 | module wheel_white() { |
72 | color("white") { |
73 | linear_extrude(height = qr_height) { |
74 | difference() { |
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75 | qr_white_flat(); |
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76 | mounting_screw_flat(); } } } } |
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77 | |
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78 | module wheel(radius, |
79 | width, |
80 | shaft_radius, |
81 | shaft_flat_width, |
82 | wall_width, |
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83 | tread_radius) { |
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84 | wheel_black(radius, |
85 | width, |
86 | shaft_radius, |
87 | shaft_flat_width, |
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88 | wall_width, |
89 | tread_radius); |
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90 | wheel_white(); } |
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91 | |
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92 | module wheel_solid(radius, |
93 | width, |
94 | shaft_radius, |
95 | shaft_flat_width, |
96 | wall_width, |
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97 | tread_radius) { |
98 | difference() { |
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99 | rim(radius, wall_width * 2, width); |
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100 | translate([0, 0, width / 2]) { |
101 | tread(radius, tread_radius); } } |
102 | linear_extrude(height = qr_height) { |
103 | difference() { |
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104 | square(qr_size, center = true); |
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105 | mounting_screw_flat(); } } |
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106 | translate([0, 0, qr_height]) { |
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107 | motor_shaft_holder(shaft_radius, |
108 | shaft_flat_width, |
109 | wall_width, |
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110 | width - qr_height); } } |
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111 | |
112 | /* |
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113 | wheel(wheel_radius, |
114 | wheel_width, |
115 | motor_shaft_radius, |
116 | motor_shaft_flat_width, |
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117 | wall_width, |
118 | tread_radius); |
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119 | */ |
120 | |
121 | wheel_solid(wheel_radius, |
122 | wheel_width, |
123 | motor_shaft_radius, |
124 | motor_shaft_flat_width, |
125 | wall_width, |
126 | tread_radius); |