From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Mon, 14 Dec 2015 01:18:58 +0000 (+0000)
Subject: filamentspool: Prep for varying arm number (nfc)
X-Git-Tag: filamentspool-v2-release~104
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=commitdiff_plain;h=6e59b7c2623c6a08e7680e9277bd9a912e1e3ff2

filamentspool: Prep for varying arm number (nfc)
---

diff --git a/filamentspool.scad b/filamentspool.scad
index 48d0a48..45d3049 100644
--- a/filamentspool.scad
+++ b/filamentspool.scad
@@ -8,6 +8,8 @@ bigslop=slop*2;
 function selsz(sm,lg) = fdia < 2 ? sm : lg;
 function usedove() = selsz(true,false);
 
+num_arms = 3;
+
 exteffrad = 70;
 hubeffrad = selsz(30, 60);
 hubbigrad = selsz(20, 50);
@@ -253,7 +255,7 @@ module Hub(){ ////toplevel
 	  cylinder($fn=30, h=hublthick+2, r=(hubbigrad-hublwidth));
       }
       cylinder(h=hubaxlelen, r=axlerad+hublwidth);
-      for (ang=[0,120,240])
+      for (ang=[0 : 360/num_arms : 359])
 	rotate([0,0,ang]) {
 	  difference() {
 	    if (usedove()){
@@ -287,7 +289,7 @@ module Hub(){ ////toplevel
 	    }
 	  }
 	}
-      for (ang = [0 : 60 : 359])
+      for (ang = [0 : 180/num_arms : 359])
 	rotate([0,0,ang]) rotate([90,0,0]) {
 	  translate([0,0,-hublwidth/2])
 	    linear_extrude(height=hublwidth)