// https://gitorious.org/ozzloy/challenge-bot
// https://github.com/waynegramlich/challenge-bot
+use <oshw.scad>
+
// use 10 ish for development, 60 or so for printing
$fn = 60;
-standoff_radius = 14.732 / 2; // 0.580 / 2 inches from spec sheet
-standoff_height = 48; // eyeballed
+/* measured with calipers */
+ball_diameter = 12.7 + 0.80; // extra bit added for printing imprecision
+ball_radius = ball_diameter / 2;
+
+standoff_height = 60; // kyle eyeballed
+
+wall_thickness = 1;
+holder_floor = 3;
+holder_arms_length = 20;
+holder_height =
+ holder_floor + holder_arms_length + (11 / 16) * 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_lower_portion_height = standoff_height - holder_height;
// eyeballed caster flange height, (0.580/5) inches, times 2 to be stronger
caster_flange_height = 5;
module deck_flange(){
difference(){
- cylinder(h = deck_flange_height, r = deck_flange_radius);
+ scale([0.265, 0.265, 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])
- cylinder(h = deck_flange_height * 1.1,
- r = deck_flange_screw_radius);}}}
+ r = deck_flange_screw_radius);}
+ translate([0, deck_grid_width / 2, -.1])
+ cylinder(h = deck_flange_height * 1.1,
+ r = deck_flange_screw_radius);}}
module deck_flange_reinforcement(){
translate([-deck_flange_radius,
deck_flange_height * 1.1, // 1.1 is bigger than 1
deck_flange_radius]);}}}}}
+module ball_holder(){
+ gap = wall_thickness * 4;
+ difference (){
+ cylinder(r = holder_radius, h = holder_height);
+ 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],
+ center = true);}}}
+
module caster_standoff(){
- cylinder(h = standoff_height - caster_flange_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();}
- caster_deck_interlock_solid();}
-
-module ball_holder(){
- /* measured with calipers */
- ball_diameter = 12.7 + 0.5;
- ball_radius = ball_diameter / 2;
-
- wall_thickness = 1.5;
- holder_height = ball_radius + wall_thickness * 2;
-
- holder_outer_radius = ball_radius + wall_thickness;
- holder_outer_diameter = holder_outer_radius * 2;
-
- difference (){
- cylinder(r = holder_outer_radius, h = holder_height);
- translate([0, 0, ball_radius + wall_thickness]){
- sphere(r = ball_radius);}
- translate([0, 0, holder_height / 2 + wall_thickness]){
- cube([holder_outer_diameter + 0.1,
- wall_thickness * 2,
- holder_height],
- center = true);}}}
+ translate([0, 0, standoff_lower_portion_height]){
+ ball_holder();}}
-ball_holder();
-//caster_standoff();
+caster_standoff();