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 standoff_radius
= 14.732 / 2; // 0.580 / 2 inches from spec sheet
11 standoff_height
= 55; // eyeballed
13 nut_short_side
= 4.7; // from calipers
14 nut_height
= 1.6; // from calipers
16 // eyeballed caster flange height, (0.580/5) inches, times 2 to be stronger
17 caster_flange_height
= 5;
18 caster_flange_width
= 20.32; // 0.800 inches
19 caster_flange_screw_radius
= 2.286 / 2; // 0.090 inches
20 caster_flange_screw_length
= 8; // eyeballed
22 deck_grid_width
= 25.4; // measured center to center on grid on pegboard
23 deck_flange_height
= 2.9464;
24 deck_flange_screw_radius
= 3.556 / 2; // For #6 machine screws
25 deck_flange_radius
= (deck_grid_width
) / 2 + deck_flange_screw_radius
+ 3;
29 cylinder(h
= deck_flange_height
, r
= deck_flange_radius
);
31 translate([deck_grid_width
/ 2 * ii
, 0, -.1])
32 cylinder(h
= deck_flange_height
* 1.1,
33 r
= deck_flange_screw_radius
);
34 translate([0, deck_grid_width
/ 2 * ii
, -.1])
35 cylinder(h
= deck_flange_height
* 1.1,
36 r
= deck_flange_screw_radius
);}}}
38 module
deck_flange_reinforcement(){
39 translate([-deck_flange_radius
,
40 -.5 * deck_flange_height
/ 2,
43 cube([deck_flange_radius
, deck_flange_height
/ 2, deck_flange_radius
]);
44 translate([-.1, -.05 * deck_flange_height
, 0]){
46 cube([deck_flange_radius
* 1.5, // 1.5 is bigger than sqrt(2)
47 deck_flange_height
* 1.1, // 1.1 is bigger than 1
48 deck_flange_radius
]);}}}}}
50 module
caster_flange_screws(){
51 translate([standoff_radius
, 0, 0])
52 cylinder(h
= caster_flange_screw_length
,
53 r
= caster_flange_screw_radius
);
54 translate([-standoff_radius
, 0, 0])
55 cylinder(h
= caster_flange_screw_length
,
56 r
= caster_flange_screw_radius
);}
58 module
caster_flange(){
59 side_radius
= caster_flange_width
/ 2 - standoff_radius
;
61 cylinder(h
= caster_flange_height
, r
= standoff_radius
);
62 translate([standoff_radius
, 0, 0])
63 cylinder(h
= caster_flange_height
, r
= side_radius
);
64 translate([-standoff_radius
, 0, 0])
65 cylinder(h
= caster_flange_height
, r
= side_radius
);}}
67 module
nut(size
, height
){
69 for (r
= [-60, 0, 60]) rotate([0,0,r
]) cube([width
, size
, height
], true);}
72 translate([standoff_radius
, 0, nut_height
/2])
73 nut(nut_short_side
, nut_height
+ .1);
74 translate([-standoff_radius
, 0, nut_height
/2])
75 nut(nut_short_side
, nut_height
+ .1);}
78 //measured with calipers
80 thread_radius
= 2.17 / 2 - 0.1; // subtract 0.1 to make squeeze fit
82 head_radius
= 4.1 / 2;
83 cylinder(r
= thread_radius
, h
= screw_length
);
84 cylinder(r
= head_radius
, h
= head_height
);}
86 module
caster_standoff_deck_side(){
88 cylinder(h
= standoff_height
- caster_flange_height
,
90 translate([0, 0, standoff_height
- caster_flange_screw_length
* 1.1 + 0.1])
92 caster_flange_screws();
93 translate([0, 0, standoff_height
- (caster_flange_height
+ nut_height
)])
95 translate([0, 0, standoff_height
]){
96 // make hole to get to screw head depth
97 cylinder(r
= 4.1 / 2, h
= 3, center
= true);
98 translate([0, 0, -0.7])
100 _2_screw(r
= 0.5, h
= 5);}}
103 rotate([0, 0, 45 + 90 * ii
])
104 deck_flange_reinforcement();}}
106 module
caster_standoff_caster_side(){
109 translate([0, 0, caster_flange_height
- 0.7]){
112 // make hole to get to screw head
113 translate([0, 0, caster_flange_height
- 0.8]){
114 cylinder(r
= 4.1 / 2, h
= 10);}
115 translate([0, 0, -.1]){
116 caster_flange_screws();}}}
118 caster_standoff_deck_side();
119 translate([caster_flange_width
/ 2 + deck_flange_radius
+ 1, 0, 0]){
120 caster_standoff_caster_side();}