// https://gitorious.org/ozzloy/challenge-bot
// https://github.com/waynegramlich/challenge-bot
+include <caster-standoff-dimensions.scad>
+use <oshw.scad>
+
// use 10 ish for development, 60 or so for printing
$fn = 60;
-/* measured with calipers */
-ball_diameter = 12.7 + 0.80; // extra bit added for printing imprecision
-ball_radius = ball_diameter / 2;
-
-wall_thickness = 1;
-holder_floor = 3;
-holder_arms_length = 10;
-holder_height = holder_floor + holder_arms_length + (25 / 32) * ball_diameter;
-
-holder_radius = ball_radius + wall_thickness;
-holder_diameter = holder_radius * 2;
-
-standoff_radius = holder_radius; // 0.580 / 2 inches from spec sheet
-standoff_height = 48; // eyeballed
-
-// eyeballed caster flange height, (0.580/5) inches, times 2 to be stronger
-caster_flange_height = 5;
-caster_flange_width = 20.32; // 0.800 inches
-caster_flange_screw_radius = 2.286 / 2; // 0.090 inches
-caster_flange_screw_length = 8; // eyeballed
-
-deck_grid_width = 25.4; // measured center to center on grid on pegboard
-deck_flange_height = 2.9464;
-deck_flange_screw_radius = 3.556 / 2; // For #6 machine screws
-deck_flange_radius = (deck_grid_width) / 2 + deck_flange_screw_radius + 3;
-
module deck_flange(){
+ deck_pitch_diagonal = sqrt(2 * pow(deck_pitch, 2));
difference(){
- cylinder(h = deck_flange_height, r = deck_flange_radius);
+ scale([0.35, 0.35, 1]){
+ linear_extrude(height = deck_flange_height){
+ oshw();}}
for(ii = [-1, 1]){
- translate([deck_grid_width / 2 * ii, 0, -.1])
- cylinder(h = deck_flange_height * 1.1,
- r = deck_flange_screw_radius);
- translate([0, deck_grid_width / 2 * ii, -.1])
+ translate([deck_pitch_diagonal / 2 * ii, 0, -.1])
cylinder(h = deck_flange_height * 1.1,
- r = deck_flange_screw_radius);}}}
+ r = deck_flange_screw_radius);}
+ translate([0, deck_pitch_diagonal / 2, -.1])
+ cylinder(h = deck_flange_height * 1.1,
+ r = deck_flange_screw_radius);}}
module deck_flange_reinforcement(){
translate([-deck_flange_radius,
deck_flange_radius]);}}}}}
module ball_holder(){
- gap = wall_thickness * 4;
difference (){
- cylinder(r = holder_radius, h = holder_height);
+ union(){
+ cylinder(r = holder_radius, h = holder_height);
+ translate([0, 0, holder_arms_length]){
+ cylinder(r1 = holder_radius,
+ r2 = holder_radius + wall_thickness,
+ h = wall_thickness);
+ translate([0, 0, wall_thickness]){
+ cylinder(r = wall_thickness + holder_radius,
+ h = holder_height
+ - holder_arms_length
+ - wall_thickness); }}}
translate([0, 0, ball_radius + holder_floor + holder_arms_length]){
sphere(r = ball_radius);}
translate([0, 0, holder_floor + (holder_height - holder_floor) / 2 + 0.5]){
- cube([holder_diameter + 0.1, gap, holder_height - holder_floor + 0.1],
+ cube([holder_diameter + wall_thickness * 2 + 0.1,
+ gap,
+ holder_height - holder_floor + 0.1],
center = true);}}}
module caster_standoff(){
- cylinder(h = standoff_height,
+ cylinder(h = standoff_lower_portion_height,
r = standoff_radius);
deck_flange();
for(ii = [0:3]){
rotate([0, 0, 45 + 90 * ii])
deck_flange_reinforcement();}
- translate([0, 0, standoff_height]){
+ translate([0, 0, standoff_lower_portion_height]){
ball_holder();}}
-//caster_standoff();
-ball_holder();
+caster_standoff();