From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sun, 16 Sep 2012 23:53:06 +0000 (+0100)
Subject: filamentspool AxleFrictionWasher
X-Git-Tag: filamentspool-v2-release~777
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=c198e158b12b7dc9b6c3a201f1f8ece8e39894d1;hp=656032c27b8b8d0a5040a50e9bd4c16866024eeb;p=reprap-play.git

filamentspool AxleFrictionWasher
---

diff --git a/filamentspool.scad b/filamentspool.scad
index 4aae9c8..b88a8b0 100644
--- a/filamentspool.scad
+++ b/filamentspool.scad
@@ -66,6 +66,8 @@ axlepintabrad = 5;
 
 washerthick = 1.2;
 washerrad = hubaxlerad + 7.5;
+frictionwasherarmwidth = 3;
+frictionwasherextrapush = 1.0;
 
 ratchetpawl=ratchetstep-ratchettooth-bigslop*2;
 
@@ -321,6 +323,27 @@ module AxleWasher(){ ////toplevel
   }
 }
 
+module AxleFrictionWasher(){ ////toplevel
+  difference(){
+    cylinder(h=washerthick, r=washerrad);
+    translate([0,0,-1]) cylinder(h=washerthick+2, r=hubaxlerad+slop);
+  }
+  frarmr = hubbigrad;
+  frarmw = frictionwasherarmwidth;
+  frarmpawlr = hublwidth;
+  frarmpawlpush = slop*4 + frictionwasherextrapush;
+  for (ang=[0,180]) rotate([0,0,ang]) {
+    translate([washerrad-1, -frarmw/2, 0])
+      cube([frarmr - washerrad + 1, frarmw, washerthick]);
+    intersection(){
+      translate([frarmr - frarmpawlr, -50, 0])
+	cube([frarmpawlr, 100, 50]);
+      rotate([0,90,0])
+	cylinder(h = 50, r = frarmpawlpush, $fn=36);
+    }
+  }
+}
+
 module TowerExtender(){ ////toplevel
   l = totalheightfromtower - axlevertheight;
   echo("TowerExtender",l);
@@ -338,3 +361,4 @@ module TowerExtender(){ ////toplevel
 //Axle();
 //AxleWasher();
 //AxlePin();
+//AxleFrictionWasher();