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
= 12.7 + 0.80; // extra bit added for printing imprecision
14 ball_radius
= ball_diameter
/ 2;
16 standoff_height
= 60; // kyle eyeballed
20 holder_arms_length
= 20;
22 holder_floor
+ holder_arms_length
+ (11 / 16) * ball_diameter
;
24 holder_radius
= ball_radius
+ wall_thickness
;
25 holder_diameter
= holder_radius
* 2;
27 standoff_radius
= holder_radius
; // 0.580 / 2 inches from spec sheet
28 standoff_lower_portion_height
= standoff_height
- holder_height
;
30 // eyeballed caster flange height, (0.580/5) inches, times 2 to be stronger
31 caster_flange_height
= 5;
32 caster_flange_width
= 20.32; // 0.800 inches
33 caster_flange_screw_radius
= 2.286 / 2; // 0.090 inches
34 caster_flange_screw_length
= 8; // eyeballed
36 deck_pitch
= 25.4; // measured center to center on grid on pegboard
37 deck_flange_height
= 2.9464;
38 deck_flange_screw_radius
= 3.556 / 2; // For #6 machine screws
39 deck_flange_radius
= (deck_pitch
) / 2 + deck_flange_screw_radius
+ 3;
42 deck_pitch_diagonal
= sqrt(2 * pow(deck_pitch
, 2));
44 scale([0.35, 0.35, 1]){
45 linear_extrude(height
= deck_flange_height
){
48 translate([deck_pitch_diagonal
/ 2 * ii
, 0, -.1])
49 cylinder(h
= deck_flange_height
* 1.1,
50 r
= deck_flange_screw_radius
);}
51 translate([0, deck_pitch_diagonal
/ 2, -.1])
52 cylinder(h
= deck_flange_height
* 1.1,
53 r
= deck_flange_screw_radius
);}}
55 module
deck_flange_reinforcement(){
56 translate([-deck_flange_radius
,
57 -.5 * deck_flange_height
/ 2,
60 cube([deck_flange_radius
, deck_flange_height
/ 2, deck_flange_radius
]);
61 translate([-.1, -.05 * deck_flange_height
, 0]){
63 cube([deck_flange_radius
* 1.5, // 1.5 is bigger than sqrt(2)
64 deck_flange_height
* 1.1, // 1.1 is bigger than 1
65 deck_flange_radius
]);}}}}}
68 gap
= wall_thickness
* 4;
70 cylinder(r
= holder_radius
, h
= holder_height
);
71 translate([0, 0, ball_radius
+ holder_floor
+ holder_arms_length
]){
72 sphere(r
= ball_radius
);}
73 translate([0, 0, holder_floor
+ (holder_height
- holder_floor
) / 2 + 0.5]){
74 cube([holder_diameter
+ 0.1, gap
, holder_height
- holder_floor
+ 0.1],
77 module
caster_standoff(){
78 cylinder(h
= standoff_lower_portion_height
,
82 rotate([0, 0, 45 + 90 * ii
])
83 deck_flange_reinforcement();}
84 translate([0, 0, standoff_lower_portion_height
]){