From b6b7ab084845af53765a57e24b5e96c284763c6f Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 15 Sep 2012 23:06:37 +0100
Subject: [PATCH] filamentspool CupSecuringClip

---
 filamentspool.scad | 46 +++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 43 insertions(+), 3 deletions(-)

diff --git a/filamentspool.scad b/filamentspool.scad
index 8dbf1bf..65592f5 100644
--- a/filamentspool.scad
+++ b/filamentspool.scad
@@ -16,7 +16,16 @@ prongstalkxwidth=3;
 
 stalklength=40;
 overclipcupgap=5;
-overclipheight=15;
+overclipdepth=15;
+overcliproundr=2.0;
+overclipthick=0.5;
+
+wingspoke=3;
+wingsize=6;
+wingthick=3;
+
+overclipsmaller=-1.0;
+overclipbigger=2.0;
 
 armendwallthick=2.5;
 armendbasethick=1.2;
@@ -105,7 +114,7 @@ module FilamentCup() {
 
   midrad = cupbigrad + prongwidth/2;
 
-  propshift = stalklength - overclipheight - prongthick;
+  propshift = stalklength - overclipdepth - prongthick;
   proptaken = propshift;
   echo(cupbigrad, dx, midrad, propshift, proptaken);
 
@@ -115,5 +124,36 @@ module FilamentCup() {
 	  prongthick]);
 }
 
+module CupSecuringClipSolid(w,d,h1,h2){
+  rotate([0,-90,0]) translate([0,-h1/2,-w/2]) linear_extrude(height=w) {
+    polygon(points=[[0,0], [d,0], [d,h2], [0,h1]]);
+  }
+}
+
+module CupSecuringClipSolidSmooth(xrad=0, xdepth=0){
+  hbase = totalheight + prongstalkxwidth - overcliproundr*2;
+  minkowski(){
+    CupSecuringClipSolid(w=totalwidth,
+			 d=overclipdepth + xdepth,
+			 h1=hbase - overclipsmaller,
+			 h2=hbase + overclipbigger);
+    cylinder($fn=20, h=0.01, r=overcliproundr+xrad);
+  }
+}
+
+module CupSecuringClip(){
+  wingswidth = wingspoke*2 + overclipthick*2 + overcliproundr*2 + totalwidth;
+  difference(){
+    union(){
+      CupSecuringClipSolidSmooth(xrad=overclipthick, xdepth=0);
+      translate([-wingswidth/2, -wingsize/2, 0])
+	cube([wingswidth, wingsize, wingthick]);
+    }
+    translate([0,0,-0.1])
+      CupSecuringClipSolidSmooth(xrad=0, xdepth=5);
+  }
+}
+
 //ArmEnd();
-FilamentCup();
+//FilamentCup();
+CupSecuringClip();
-- 
2.30.2