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
7 // use 10 ish for development, 60 or so for printing
10 /* measured with calipers */
11 ball_diameter
= 12.7 + 0.80; // extra bit added for printing imprecision
12 ball_radius
= ball_diameter
/ 2;
16 holder_arms_length
= 10;
18 holder_floor
+ holder_arms_length
+ (11 / 16) * ball_diameter
;
20 holder_radius
= ball_radius
+ wall_thickness
;
21 holder_diameter
= holder_radius
* 2;
23 standoff_radius
= holder_radius
; // 0.580 / 2 inches from spec sheet
24 standoff_height
= 48 - holder_height
; // eyeballed
26 // eyeballed caster flange height, (0.580/5) inches, times 2 to be stronger
27 caster_flange_height
= 5;
28 caster_flange_width
= 20.32; // 0.800 inches
29 caster_flange_screw_radius
= 2.286 / 2; // 0.090 inches
30 caster_flange_screw_length
= 8; // eyeballed
32 deck_grid_width
= 25.4; // measured center to center on grid on pegboard
33 deck_flange_height
= 2.9464;
34 deck_flange_screw_radius
= 3.556 / 2; // For #6 machine screws
35 deck_flange_radius
= (deck_grid_width
) / 2 + deck_flange_screw_radius
+ 3;
39 cylinder(h
= deck_flange_height
, r
= deck_flange_radius
);
41 translate([deck_grid_width
/ 2 * ii
, 0, -.1])
42 cylinder(h
= deck_flange_height
* 1.1,
43 r
= deck_flange_screw_radius
);
44 translate([0, deck_grid_width
/ 2 * ii
, -.1])
45 cylinder(h
= deck_flange_height
* 1.1,
46 r
= deck_flange_screw_radius
);}}}
48 module
deck_flange_reinforcement(){
49 translate([-deck_flange_radius
,
50 -.5 * deck_flange_height
/ 2,
53 cube([deck_flange_radius
, deck_flange_height
/ 2, deck_flange_radius
]);
54 translate([-.1, -.05 * deck_flange_height
, 0]){
56 cube([deck_flange_radius
* 1.5, // 1.5 is bigger than sqrt(2)
57 deck_flange_height
* 1.1, // 1.1 is bigger than 1
58 deck_flange_radius
]);}}}}}
61 gap
= wall_thickness
* 4;
63 cylinder(r
= holder_radius
, h
= holder_height
);
64 translate([0, 0, ball_radius
+ holder_floor
+ holder_arms_length
]){
65 sphere(r
= ball_radius
);}
66 translate([0, 0, holder_floor
+ (holder_height
- holder_floor
) / 2 + 0.5]){
67 cube([holder_diameter
+ 0.1, gap
, holder_height
- holder_floor
+ 0.1],
70 module
caster_standoff(){
71 cylinder(h
= standoff_height
,
75 rotate([0, 0, 45 + 90 * ii
])
76 deck_flange_reinforcement();}
77 translate([0, 0, standoff_height
]){