From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 15 Sep 2012 21:42:26 +0000 (+0100)
Subject: filamentspool wip
X-Git-Tag: filamentspool-v2-release~862
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=commitdiff_plain;h=3dccb41a1fc9eb875f939d76fdba1f0cbc1f7f71;hp=9ffb15b0eaf47f02691e9166c08f453f3cefea10

filamentspool wip
---

diff --git a/filamentspool.scad b/filamentspool.scad
index 94a0150..8dbf1bf 100644
--- a/filamentspool.scad
+++ b/filamentspool.scad
@@ -12,6 +12,8 @@ ratchettoothslope=0.75;
 overlap=0.5;
 cupbigrad=35;
 
+prongstalkxwidth=3;
+
 stalklength=40;
 overclipcupgap=5;
 overclipheight=15;
@@ -28,6 +30,7 @@ channelwidth = prongthick + slop;
 channeldepth = prongwidth + ratchettoothheight;
 totalwidth = armendwallthick*2 + channelwidth;
 totalheight = channeldepth + armendbasethick;
+stalkwidth = prongwidth + prongstalkxwidth;
 
 doveclipheight = totalheight;
 
@@ -60,10 +63,10 @@ module ArmEnd(length=120){
 module FilamentCupHandle(){
   pawlusewidth = ratchetpawl-ratchettoothsmoothr*2;
   mirror([0,1,0]) {
-    cube([stalklength, prongwidth, prongthick]);
-    translate([stalklength, prongwidth/2, 0])
-      cylinder(r=prongwidth/2, h=prongthick, $fn=20);
-    translate([ratchettoothsmoothr, prongwidth, 0]) {
+    cube([stalklength, stalkwidth, prongthick]);
+    translate([stalklength, stalkwidth/2, 0])
+      cylinder(r=stalkwidth/2, h=prongthick, $fn=20);
+    translate([ratchettoothsmoothr, stalkwidth, 0]) {
       minkowski(){
 	cylinder($fn=20,r=ratchettoothsmoothr, h=1);
 	multmatrix([	[	1, -ratchettoothslope, 0, 0	],
@@ -100,14 +103,15 @@ module FilamentCup() {
   translate([0, -1, 0]);
   cube([prongwidth, dy+1, prongthick]);
 
+  midrad = cupbigrad + prongwidth/2;
+
   propshift = stalklength - overclipheight - prongthick;
-  proptaken = propshift + prongthick;
-  echo(cupbigrad, dx, propshift, proptaken);
+  proptaken = propshift;
+  echo(cupbigrad, dx, midrad, propshift, proptaken);
 
   translate([propshift, -1, 0])
     cube([prongwidth,
-	  sqrt(cupbigrad*cupbigrad - proptaken*proptaken)
-	  + overclipcupgap + prongthick + 1,
+	  dy - sqrt(midrad*midrad - proptaken*proptaken),
 	  prongthick]);
 }