another: make supports optional

1 files changed, 4 insertions, 4 deletions

diff --git a/another.scad b/another.scad
index 85715db..2be24e4 100644
--- a/another.scad
+++ b/another.scad
@@ -43,25 +43,26 @@ module the_extruder(
  idler_clearance=1,
  pulley_clearance=2,
  lever_v_clearance=.7,				// vertical clearance for the lever
  spring_d_clearance=1,
  protrusion_tolerance_h=.5,			// horizontal tolerance for the motor protrusion
  protrusion_tolerance_v=.5,			// vertical tolerance for the motor protrusion
  mount_screw_d_tolerance=.4,
  idler_v_tolerance=.5,
  knob_bore_d_tolerance=.6,
 
  what="lever",
  left=false,
- vitamins = true
+ vitamins = true,
+ supports = false
 ) {
  lever_shell = mount_screwhead_h+0.5;
  lever_thickness=max(spring_d+layer_height*8,idler_h+idler_v_tolerance+2*lever_shell);
  lsd = idler_d-idler_clearance*2;
  longwing=gearbox_d/2+spring_d/2+lsd/2;
  h_ = (pulley_d+idler_d)/(2*sqrt(2));
  ri = sqrt( pow(h_,2) + pow(mount_d/2-h_,2) );
  spring_dl = idler_travel*longwing/ri;
 
  filament_elevation=protrusion_h+pulley_elevation+teeth_elevation;
  ls_z = filament_elevation; // leverspace mid-z
  body_h = max(protrusion_h+bore_l,mount_screw_l-mounthole_depth/2+mount_screwhead_h,ls_z*2);
@@ -136,26 +137,25 @@ module the_extruder(
  
     // filament path
     place_idler() translate([-(idler_d+filament_path_d)/2,0,0]) rotate([90,0,0]) {
      cylinder(d=filament_path_d,h=3*gearbox_d,center=true,$fn=30);
      translate([0,-filament_path_d/2/sqrt(2),0]) rotate([0,0,45])
      cube(size=[filament_path_d/2,filament_path_d/2,3*gearbox_d],center=true);
     }
     
     // idler space and mounting hole
     place_idler() {
      difference() {
       cylinder(d=idler_d+idler_clearance*2,h=idler_h+idler_v_tolerance,center=true,$fn=60);
-      // supports
-      for(y=[-lsd/2+extrusion_width:(lsd-2*extrusion_width)/3:lsd/2-extrusion_width])
+      if(supports) for(y=[-lsd/2+extrusion_width:(lsd-2*extrusion_width)/3:lsd/2-extrusion_width])
        translate([-lsd/2-1,y-extrusion_width/2,-idler_h/2-idler_v_tolerance/2-1])
        cube(size=[lsd+2,extrusion_width,idler_h+idler_v_tolerance+2]);
      }
      cylinder(d=mount_screw_d+mount_screw_d_tolerance,h=lever_thickness+2,center=true,$fn=30);
      translate([0,0,lever_thickness/2-mount_screwhead_h]) 
      cylinder(d=mount_screwhead_d,h=mount_screwhead_h+1,$fn=2*PI*mount_screwhead_d);
     }
     // mounting screw hole
     translate([mount_d/2,0,0])
     cylinder(d=mount_screw_d+mount_screw_d_tolerance,h=lever_thickness+2,center=true,$fn=2*PI*mount_screw_d);
     
     // lever end
@@ -265,25 +265,25 @@ module the_extruder(
     cylinder(d=spring_d+spring_d_clearance,h=spring_lc+spring_dl,$fn=PI*spring_d);
     translate([0,0,spring_lc+spring_dl]) sphere(d=spring_d*3/4,$fn=PI*spring_d);
    }
    //sphere(d=spring_d*3/4,$fn=PI*spring_d);
    *difference() {
     // spring support
     translate([0,-longwing,filament_elevation])
     sphere(d=spring_d*3/4,$fn=PI*spring_d);
    }
     
   }//difference
 
-  intersection() {
+  if(supports) intersection() {
    difference() {
     translate([0,0,ls_z-ls_h/2-epsilon])
     cylinder(d=gearbox_d,h=ls_h+2*epsilon,$fn=2*PI*gearbox_d);
     cylinder(d=pulley_d+pulley_clearance,h=body_h+1,$fn=2*PI*(pulley_d+pulley_clearance));
    }
    // supports
    // TODO: hardcoded stuff below…
    if(false) { // parallel
     for(y=[-gearbox_d:4:gearbox_d])
      translate([0,y-extrusion_width/2,0])
      cube(size=[gearbox_d,extrusion_width,body_h]);
    }else{ // radial