From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Tue, 9 Feb 2016 01:40:25 +0000 (+0000)
Subject: cable-splice-clamp: demo; geometry is a bit pants but seems nearly right for many... 
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=commitdiff_plain;h=2898a43cc8a80c7aa5a79e36a502ffc4c34511a9

cable-splice-clamp: demo; geometry is a bit pants but seems nearly right for many sane parameters
---

diff --git a/cable-splice-clamp.scad b/cable-splice-clamp.scad
index b1f6876..cd310bf 100644
--- a/cable-splice-clamp.scad
+++ b/cable-splice-clamp.scad
@@ -6,13 +6,15 @@ cable_mindia = 6;
 wallmin = 1;
 wall = 2;
 
-delta_ellipse = 0.5;
+delta_ellipse = 0.45;
 
 // calculated
 
 outerdia = cable_maxdia / cos(30) + wall*2;
 delta_shift = 1 - delta_ellipse;
 
+delta_shift_gap = (cable_maxdia-cable_mindia) * delta_shift;
+
 module CrossSection(plus=0) {
   difference(){
     for (dx = [-plus, 0, plus])
@@ -21,14 +23,28 @@ module CrossSection(plus=0) {
 
     scale([cable_maxdia,
 	   cable_maxdia * delta_shift + cable_mindia * delta_ellipse])
-      circle(r= 0.5, $fn=30);
+      circle(r= sqrt(0.5) * delta_shift + 0.5 * delta_ellipse, $fn=4);
 
-    square(center=true, [40, (cable_maxdia-cable_mindia) * delta_shift]);
+    square(center=true, [40, delta_shift_gap]);
   }
 }
 
-linear_extrude(height=20)
-  CrossSection(0);
+module CrossSectionDemo(){ ////toplevel
+  color("blue"){
+    translate([0, delta_shift_gap/2, 0]){
+      difference(){
+        circle(r = cable_maxdia/2, $fn=20);
+	circle(r = cable_mindia/2, $fn=20);
+      }
+    }
+  }
+  
+  linear_extrude(height=20)
+    CrossSection(0);
+
+  color("red")
+    linear_extrude(height=1)
+    CrossSection(2);
+}
 
-linear_extrude(height=1)
-  CrossSection(2);
+CrossSectionDemo();