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 standoff_height
= 55; // eyeballed
8 nut_short_side
= 4.7; // from calipers
9 nut_height
= 1.6; // from calipers
10 standoff_radius
= 14.732 / 2; // 0.580 / 2 inches from spec sheet
11 screw_radius
= 2.286/2; // 0.090 inches
12 caster_flange_screw_length
= 8; // eyeballed
13 // eyeballed caster flange height, (0.580/5) inches, times 2 to be stronger
14 caster_flange_height
= 2.9464 * 2;
15 caster_flange_width
= 20.32; // 0.800 inches
16 ziptie_width
= 4.7625; // 3/16 inch
17 ziptie_height
= 3; // i'm guessing
19 module
caster_flange_screws(){
20 translate([standoff_radius
, 0, 0])
21 cylinder(h
= caster_flange_screw_length
, r
= screw_radius
, $fn
= 20);
22 translate([-standoff_radius
, 0, 0])
23 cylinder(h
= caster_flange_screw_length
, r
= screw_radius
, $fn
= 20);}
25 module
caster_flange(){
26 side_radius
= caster_flange_width
/ 2 - standoff_radius
;
28 cylinder(h
= caster_flange_height
, r
= standoff_radius
);
29 translate([standoff_radius
, 0, 0])
30 cylinder(h
= caster_flange_height
, r
= side_radius
);
31 translate([-standoff_radius
, 0, 0])
32 cylinder(h
= caster_flange_height
, r
= side_radius
);}}
34 module
nut(size
, height
){
36 for (r
= [-60, 0, 60]) rotate([0,0,r
]) cube([width
, size
, height
], true);}
39 translate([standoff_radius
, 0, nut_height
/2])
40 nut(nut_short_side
, nut_height
);
41 translate([-standoff_radius
, 0, nut_height
/2])
42 nut(nut_short_side
, nut_height
);}
45 translate([-standoff_radius
, -ziptie_width
/2, 0])
46 cube([standoff_radius
* 2, ziptie_width
, ziptie_height
]);}
48 module
caster_standoff(){
51 cylinder(h
= standoff_height
, r
= standoff_radius
);
53 translate([0, 0, -.1]) scale([1, 1, 1.1])
54 caster_flange_screws();
55 translate([0, 0, caster_flange_height
])
57 translate([0, 0, standoff_height
* 3 / 4]) scale([1.1, 1, 1])
59 rotate([0, 0, 90]) translate([0, 0, standoff_height
* 1 / 2])