optimizied knob generation

1 files changed, 3 insertions, 5 deletions

diff --git a/another.scad b/another.scad
index 0f696cc..05bfab3 100644
--- a/another.scad
+++ b/another.scad
@@ -412,30 +412,28 @@ module the_extruder(
   translate([0,0,body_h+epsilon]) {
    mirror([0,0,1]) translate([0,0,-epsilon]) {
     difference() {
      cylinder(d=pulley_d,h=knob_bore_l,$fn=fnd*pulley_d);
      translate([0,0,-1]) difference() {
       cylinder(d=bore_d+knob_bore_d_tolerance,h=knob_bore_l+2);
       translate([-bore_d/2-1,bore_dd-bore_d/2+knob_bore_d_tolerance/2,-1])
       cube([bore_d+2,bore_d/2,knob_bore_l+4]);
      }
     }
    }
    difference() {
-    union() {
-     cylinder(d1=gearbox_d-2*ch,d2=gearbox_d,h=ch+epsilon,$fn=fnd*gearbox_d);
+    hull() {
+     cylinder(d=gearbox_d-2*ch,h=knob_h,$fn=fnd*gearbox_d);
      translate([0,0,ch])
-     cylinder(d=gearbox_d,h=knob_h-2*ch+epsilon,$fn=fnd*gearbox_d);
-     translate([0,0,knob_h-ch])
-     cylinder(d1=gearbox_d,d2=gearbox_d-2*ch,h=ch,$fn=fnd*gearbox_d);
+     cylinder(d=gearbox_d,h=knob_h-2*ch,$fn=fnd*gearbox_d);
     }
     for(a=[0:360/knob_indents:359]) rotate([0,0,a])
      translate([0,gearbox_d/2,-1])
      cylinder(d=knob_indent_d,h=knob_h+2,$fn=fnd*knob_indent_d);
    }
   }
  }//knob module
 
  module debug() {
   difference() {
    children();
    if(debug) {