From: daniel watson <ozzloy@gmail.com>
Date: Sat, 14 Sep 2013 20:11:43 +0000 (-0700)
Subject: measure nuts instead of guess from diagram
X-Git-Url: http://challenge-bot.com/repos/?p=challenge-bot;a=commitdiff_plain;h=f2a874c1149aca85083703362e435599ae211736

measure nuts instead of guess from diagram
---

diff --git a/caster-standoff.scad b/caster-standoff.scad
index 4a1bafe..3e5a085 100644
--- a/caster-standoff.scad
+++ b/caster-standoff.scad
@@ -9,11 +9,11 @@ $fn = 100;
 module ball_screws(){
   between = 14.732;  // 0.580 inches
   screw_radius = 2.286/2;  // 0.090 inches
-  screw_length = 15;  // i made this up
+  screw_length = 8;  // i eyeballed this
   translate([between/2, 0, 0]) cylinder(h = screw_length, r = screw_radius);
   translate([-between/2, 0, 0]) cylinder(h = screw_length, r = screw_radius);}
 
-module fixture(){
+module caster_flange(){
   // i eyeballed this too, it's (0.580/5) inches, times 2 to be stronger
   height = 2.9464 * 2;
   width = 20.32;  // 0.800 inches
@@ -24,14 +24,17 @@ module fixture(){
     translate([between/2, 0, 0]) cylinder(h = height, r = side_radius);
     translate([-between/2, 0, 0]) cylinder(h = height, r = side_radius);}}
 
+module hexagon(size, height){
+    boxWidth = size/1.75;
+    for (r = [-60, 0, 60]) rotate([0,0,r]) cube([boxWidth, size, height], true);}
+
 module nuts(){
-  // i eyeballed this too, it's (0.580/5) inches, times 2 to be stronger
-  height = 2.9464;
-  width = 20.32;  // 0.800 inches
-  between = 14.732;  //0.580 inches
-  side_radius = (width - between)/2;
-  translate([between/2, 0, 0]) cylinder(h = height, r = side_radius);
-  translate([-between/2, 0, 0]) cylinder(h = height, r = side_radius);}
+  height = 1.6;  // from calipers
+  overall_width = 20.32;  // 0.800 inches
+  between = 14.732;  // 0.580 inches
+  short_side_nut = 4.7;  // from calipers
+  translate([between/2, 0, height/2]) hexagon(4.7, height);
+  translate([-between/2, 0, height/2]) hexagon(4.7, height);}
 
 module ziptie(){
   ziptie_width = 4.7625; // 3/16 inch
@@ -43,13 +46,13 @@ module ziptie(){
 module caster_standoff(){
   height = 43;
   caster_radius = 14.732/2;
-  fixture_height = 2.9464 * 2;
+  caster_flange_height = 2.9464 * 2;
   difference(){
     union(){
       cylinder(h = height, r = caster_radius);
-      fixture();}
+      caster_flange();}
     translate([0, 0, -.1]) scale([1, 1, 1.1]) ball_screws();
-    translate([0, 0, fixture_height]) nuts();
+    translate([0, 0, caster_flange_height]) nuts();
     translate([0, 0, height * 3 / 4]) scale([1.1, 1, 1]) ziptie();
     rotate([0, 0, 90]) translate([0, 0, height * 1 / 2]) scale([1.1, 1, 1])
       ziptie();}}