Modified pulley. Bigger nut entrance, longer teeth, easier assembly.

Author: kliment

pulleymod.scad

@@ -0,0 +1,58 @@
+// Belt pulley is http://www.thingiverse.com/thing:3104 by GilesBathgate
+// GPLV3
+
+include <configuration.scad>
+
+module pulley()
+{
+
+
+	module spur()
+	{
+	linear_extrude(height=20) polygon([[-1,-1],[-1,1],[0.9,0.8],[0.9,-0.8]],[[0,1,2,3,0]]);
+	}
+	
+ difference()
+ {	 
+ 	union()
+ 	{
+ 		//base
+ 		rotate_extrude($fn=30)
+ 		{
+ 				square([9,8]);
+ 				square([10,7]);
+ 				translate([9,7]) circle(1);
+ 		}
+    	
+    	//shaft
+    	cylinder(r=motor_shaft,h=20);
+    	
+    	//spurs
+    	for(i=[1:8]) rotate([0,0,i*(360/8)]){
+    	translate([6,0,0])spur();
+	translate([6.5,0,0])spur();
+	}
+   }
+   
+   //shaft hole
+    translate([0,0,-1])cylinder(r=motor_shaft/2+0.4,h=22,$fn=15);
+    		
+    //captive nut and grub holes
+    for(j=[1:1]) rotate([0,0,j*(360/3)])
+	translate([0,20,4])rotate([90,0,0])
+	union()
+	{
+		//entrance
+		translate([0,-3,15]) cube([8.6,7,3],center=true);
+		//nut
+		translate([0,0,13.6]) rotate([0,0,30])cylinder(r=4.22,h=2.8,$fn=6);
+		//grub hole
+		translate([0,0,9]) cylinder(r=1.9,h=10);
+	}
+
+ }
+
+   
+}
+
+pulley();