16. release ball a little

[challenge-bot] / 3d-printables / caster-standoff.scad

diff --git a/3d-printables/caster-standoff.scad b/3d-printables/caster-standoff.scad
index 5b25eedc0330a905e9f63bf8e6de8902ced9d262..aff2eb5e5320d219a629c83c761a2f7305c1f6f4 100644 (file)
--- a/3d-printables/caster-standoff.scad
+++ b/3d-printables/caster-standoff.scad
@@ -8,11 +8,13 @@
 $fn = 60;
 
 /* measured with calipers */
-ball_diameter = 12.7 + 0.825; // extra bit added for printing imprecision
+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 = 10;
+holder_height = holder_floor + holder_arms_length + (25 / 32) * ball_diameter;
 
 holder_radius = ball_radius + wall_thickness;
 holder_diameter = holder_radius * 2;
@@ -56,13 +58,12 @@ module deck_flange_reinforcement(){
 
 module ball_holder(){
   gap = wall_thickness * 4;
-  floor = wall_thickness;
   difference (){
-    cylinder(r = holder_radius, h = holder_height + floor);
-    translate([0, 0, ball_radius + wall_thickness + floor]){
+    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_height / 2 + wall_thickness + floor]){
-      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(){