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 // use 10 ish for development, 60 or so for printing
12 /* measured with calipers */
13 ball_diameter
= 11 + 0.75; // extra bit added for printing imprecision
14 ball_radius
= ball_diameter
/ 2;
16 standoff_height
= 60; // kyle eyeballed
21 holder_arms_length
= 20;
23 holder_floor
+ holder_arms_length
+ (11 / 16) * ball_diameter
;
25 holder_radius
= ball_radius
+ wall_thickness
;
26 holder_diameter
= holder_radius
* 2;
28 standoff_radius
= holder_radius
; // 0.580 / 2 inches from spec sheet
29 standoff_lower_portion_height
= standoff_height
- holder_height
;
31 // eyeballed caster flange height, (0.580/5) inches, times 2 to be stronger
32 caster_flange_height
= 5;
33 caster_flange_width
= 20.32; // 0.800 inches
35 deck_pitch
= 25.4; // measured center to center on grid on pegboard
36 deck_flange_height
= 2.9464;
37 deck_flange_screw_radius
= 3.556 / 2; // For #6 machine screws
38 deck_flange_radius
= (deck_pitch
) / 2 + deck_flange_screw_radius
+ 3;
40 module
deck_flange() {
41 deck_pitch_diagonal
= sqrt(2 * pow(deck_pitch
, 2));
43 scale([0.35, 0.35, 1]) {
44 linear_extrude(height
= deck_flange_height
) {
47 translate([deck_pitch_diagonal
/ 2 * ii
, 0, -.1])
48 cylinder(h
= deck_flange_height
* 1.1,
49 r
= deck_flange_screw_radius
); }
50 translate([0, deck_pitch_diagonal
/ 2, -.1])
51 cylinder(h
= deck_flange_height
* 1.1,
52 r
= deck_flange_screw_radius
); } }
54 module
deck_flange_reinforcement() {
55 translate([-deck_flange_radius
,
56 -.5 * deck_flange_height
/ 2,
57 deck_flange_height
]) {
59 cube([deck_flange_radius
, deck_flange_height
/ 2, deck_flange_radius
]);
60 translate([-.1, -.05 * deck_flange_height
, 0]) {
62 cube([deck_flange_radius
* 1.5, // 1.5 is bigger than sqrt(2)
63 deck_flange_height
* 1.1, // 1.1 is bigger than 1
64 deck_flange_radius
]); } } } } }
66 module
ball_holder() {
69 cylinder(r
= holder_radius
, h
= holder_height
);
70 translate([0, 0, holder_arms_length
]) {
71 cylinder(r1
= holder_radius
,
72 r2
= holder_radius
+ wall_thickness
,
74 translate([0, 0, wall_thickness
]) {
75 cylinder(r
= wall_thickness
+ holder_radius
,
78 - wall_thickness
); } } }
79 translate([0, 0, ball_radius
+ holder_floor
+ holder_arms_length
]) {
80 sphere(r
= ball_radius
); }
81 translate([0, 0, holder_floor
+ (holder_height
- holder_floor
) / 2 + 0.5]) {
82 cube([holder_diameter
+ wall_thickness
* 2 + 0.1,
84 holder_height
- holder_floor
+ 0.1],
87 module
caster_standoff() {
88 cylinder(h
= standoff_lower_portion_height
,
92 rotate([0, 0, 45 + 90 * ii
])
93 deck_flange_reinforcement(); }
94 translate([0, 0, standoff_lower_portion_height
]) {