From ffdb1be0b2771deee73d986c2fff0e94abc850b8 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 15 Sep 2012 19:59:56 +0100
Subject: [PATCH 1/1] filamentspool wip

---
 filamentspool.scad | 42 +++++++++++++++++++++++++++++++++++-------
 1 file changed, 35 insertions(+), 7 deletions(-)

diff --git a/filamentspool.scad b/filamentspool.scad
index eb4ee6d..a0ca9d9 100644
--- a/filamentspool.scad
+++ b/filamentspool.scad
@@ -3,24 +3,52 @@ slop=0.5;
 
 prongthick=5;
 prongwidth=5;
-ratchetstep=10;
+ratchetstep=15;
 ratchettooth=3;
 ratchettoothheight=5;
+ratchettoothsmoothr=1;
+ratchettoothslope=0.75;
 overlap=0.5;
 
 armendwallthick=2.5;
 armendbasethick=1.2;
 
-module ArmEnd(length=100){
+include <doveclip.scad>
+
+module ArmEnd(length=120){
   channelwidth = prongthick + slop;
   channeldepth = prongwidth + ratchettoothheight;
   totalwidth = armendwallthick*2 + channelwidth;
   totalheight = channeldepth + armendbasethick;
-  difference(){
-    translate([0, -armendwallthick, -armendbasethick])
-      cube([ratchetstep+overlap, totalwidth, totalheight]);
-    translate([-1, 0, 0])
-      cube([ratchetstep+overlap+2, channelwidth, channeldepth+1]);
+
+  basecube = 5;
+
+  translate([0, 3, -armendbasethick]) {
+    translate([-basecube+0.5, -7.5, 0])
+      cube([basecube, 15, totalheight]);
+
+    translate([-basecube+2,0,0])
+      rotate([0,0,-90])
+      DoveClipPair(h=totalheight);
+  }
+
+  for (dx = [0 : ratchetstep : length]) translate([dx,0,0]) {
+    difference(){
+      translate([0, -armendwallthick, -armendbasethick])
+	cube([ratchetstep+overlap, totalwidth, totalheight]);
+      translate([-1, 0, 0])
+	cube([ratchetstep+overlap+2, channelwidth, channeldepth+1]);
+    }
+    translate([ratchettoothsmoothr+0.5, armendwallthick/2, 0]) minkowski(){
+      rotate([90,0,0])
+	cylinder($fn=20, r=ratchettoothsmoothr, h=armendwallthick);
+      multmatrix([	[	1, 0, ratchettoothslope, 0	],
+			[	0,	1,	0,	0	],
+			[	0,	0,	1,	0	],
+			[	0,	0,	0,	1	]])
+	cube([ratchettooth - ratchettoothsmoothr*2,
+	      channelwidth, ratchettoothheight]);
+    }
   }
 }
 
-- 
2.30.2