$fn = 60;
/* measured with calipers */
-ball_diameter = 12.7 + 1;
+ball_diameter = 12.7 + 0.80; // extra bit added for printing imprecision
ball_radius = ball_diameter / 2;
wall_thickness = 1;
-holder_height = (25 / 32) * ball_diameter + wall_thickness;
+holder_floor = 3;
+holder_arms_length = 17;
+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
+standoff_height = 48 - holder_height; // eyeballed
// eyeballed caster flange height, (0.580/5) inches, times 2 to be stronger
caster_flange_height = 5;
gap = wall_thickness * 4;
difference (){
cylinder(r = holder_radius, h = holder_height);
- translate([0, 0, ball_radius + wall_thickness]){
+ translate([0, 0, ball_radius + holder_floor + holder_arms_length]){
sphere(r = ball_radius);}
- translate([0, 0, holder_height / 2 + wall_thickness]){
- cube([holder_diameter + 0.1, gap, holder_height],
+ 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(){
translate([0, 0, standoff_height]){
ball_holder();}}
-//caster_standoff();
-ball_holder();
+caster_standoff();