correct clearance radius for hotend clearanceHEADmaster

1 files changed, 4 insertions, 2 deletions

diff --git a/fanduct.scad b/fanduct.scad
index efc6a19..b1c9bd8 100644
--- a/fanduct.scad
+++ b/fanduct.scad
@@ -293,131 +293,133 @@ module fanduct(type=type,ductshape=ductshape,dual=dual) {
    }
    if(what=="in") {
     cfn= 4; // clearance cutout $fn
     difference() {
      hulls() {
       cylinder(d=fanduct_w+2*fanduct_shell,h=2*fanduct_shell+fanduct_h/2);
       translate([0,-nozzles_apart/2,-fanduct_elevation-fanduct_blowtarget]) sphere(d=.1);
      }
      translate([0,0,epsilon]) hull() for(my=[0:1]) mirror([0,my,0]) for(s=dual_spots) translate(s)
       mirror([0,0,1]) cylinder(d=fanduct_w+2*fanduct_shell+2,h=fanduct_elevation-fanduct_blowtarget+1);
      for(s=[-1,1]) translate([0,s*nozzles_apart/2,-1])
       rotate([0,0,180/cfn]) cylinder(r=hotend_clearance/cos(180/cfn),h=fanduct_h+2*fanduct_shell+2,$fn=cfn);
     }
    }else if(what=="out") {
     hulls() {
      translate([0,0,fanduct_shell]) cylinder(d=fanduct_w,h=fanduct_h/2-fanduct_shell/2);
      translate([0,-nozzles_apart/2,-fanduct_elevation+fanduct_blowtarget]) sphere(d=.1);
     }
    }else if(what=="airguides") {
     far = fanduct_ir+fanduct_shell+fanduct_w;
     near = fanduct_ir;
     union() {
      for(my=[0,1]) mirror([0,my,0]) {
       guideline([ [-far             ,0], [0, nozzles_apart/8] ]);
       guideline([ [-far             ,inlet_w/2/4 ],
                   [-near            ,to_midduct/2] ]);
       guideline([ [-near-fanduct_w/3,  to_midduct/2       ],
                   [-near            ,nozzles_apart/2+near ] ]);
       guideline([ [0                ,nozzles_apart/2+near+fanduct_w*space_behind_nozzle/to_midduct] ]);
      }
     }
    }
   }
 
   module dual_jets(what=what) {
    od=fanduct_h*2/3+fanduct_shell;
    md=fanduct_ir+fanduct_shell+fanduct_w/2;
    jww = 2*md*sin(jet_angle/2);
    difference() {
     for(my=[0,1]) mirror([0,my,0])
     translate([0,nozzles_apart/2,0])
     for(a=[45,135]) rotate([0,0,a])
     if(what=="in") {
      hull() {
       intersection() {
        translate([md-fanduct_w/2,-jww/2,0])
        cube(size=[fanduct_shell+fanduct_w/2,jww,od]);
        rotate([0,0,-a]) translate([0,-nozzles_apart/2,0]) duct(what=what);
       } // intersection
       translate([0,0,-fanduct_elevation]) sphere(r=.5);
      } // hull
     }else if(what=="out") {
      hull() {
       intersection() {
        translate([md-fanduct_w/2,-jww/2+fanduct_shell,fanduct_shell])
        cube(size=[fanduct_w/2,jww-2*fanduct_shell,od-2*fanduct_shell]);
        rotate([0,0,-a]) translate([0,-nozzles_apart/2,0]) duct(what=what);
       } // intersection
       translate([0,0,-fanduct_elevation]) sphere(r=.5);
      } // hull
     } // what=="out"
     if(what=="in") {
      translate([0,0,-fanduct_elevation/2-1+epsilon])
      cube(size=[2*(fanduct_ir+2*fanduct_shell+fanduct_w+1),nozzles_apart+2*(fanduct_ir+2*fanduct_shell+fanduct_w+1),fanduct_elevation+2],center=true);
+     cfn=4;
+     hc = hotend_clearance/cos(180/cfn);
      for(my=[0,1]) mirror([0,my,0])
-      translate([0,nozzles_apart/2,-hotend_clearance])
-      cylinder(r1=hotend_clearance*2,r2=0,h=hotend_clearance*2,$fn=4);
+      translate([0,nozzles_apart/2,-hc])
+      cylinder(r1=hc*2,r2=0,h=hc*2,$fn=cfn);
     }
    } // difference
   }
 
   module dual_simple(what=what) {
    for(my=[0:1]) mirror([0,my,0]) if(what=="in") {
     difference() {
      hull() {
       translate([0,nozzles_apart/2+fanduct_ir+fanduct_shell+fanduct_w/2,0])
       cylinder(d=fanduct_w+2*fanduct_shell,h=fanduct_h*2/3+2*fanduct_shell);
       translate([0,nozzles_apart/2,-fanduct_elevation+fanduct_blowtarget])
       rotate([0,90,0]) cylinder(r=.5,h=fanduct_w*2,center=true);
      }
      rr = 2*(fanduct_ir+fanduct_shell*2+fanduct_w+2);
      translate([-rr/2,0,0]) mirror([0,0,1]) cube(size=[rr,rr,rr]);
     }
    }else if(what=="out") {
     hull() {
      translate([0,nozzles_apart/2+fanduct_ir+fanduct_shell+fanduct_w/2,fanduct_shell])
      cylinder(d=fanduct_w,h=fanduct_h*2/3);
      translate([0,nozzles_apart/2,-fanduct_elevation+fanduct_blowtarget])
      rotate([0,90,0]) cylinder(d=.5,h=fanduct_w*2,center=true);
     }
    }
   }
 
   if(dual) {
    if(type=="simple") dual_simple(what);
    else if(type=="jets") dual_jets(what);
    else dual(what);
   }else if(type=="circular") circus(what);
   else if(type=="jets") jets(what);
  }
 
          //     ***air intake
  module intake(what) {
   module placeit() {
    translate([-fanduct_ir-2*fanduct_shell-fanduct_w-inlet_away,0,fanduct_shell])
    rotate([0,-90,0])
    children();
   }
   if(what=="in") {
    placeit() translate([0,-inlet_w/2,0]) {
     difference() {
      cube(size=[inlet_h,inlet_w,inlet_long_l+fanduct_shell]); translate([inlet_h+fanduct_shell,0,inlet_long_l+fanduct_shell])
      rotate([-90,0,0])
      translate([0,0,-1])
      cylinder(r=inlet_h,h=inlet_w+2*fanduct_shell+2,$fn=inlet_h*4);
     }
     // supports
     for(i=[-1,0,1])
      translate([-fanduct_shell,
       (i+1)*(inlet_w-extrusion_width)/2,
      -inlet_away-fanduct_w/2])
      cube(size=[fanduct_shell+1,
       extrusion_width,
       inlet_long_l+fanduct_shell+inlet_away+fanduct_w/2]);
    }
    hull() {
     placeit() translate([-fanduct_shell,-inlet_w/2-fanduct_shell,0])
     cube(size=[inlet_h+2*fanduct_shell,inlet_w+2*fanduct_shell,fanduct_shell]);
     translate([-fanduct_ir-fanduct_shell-fanduct_w/2,0,0])
     translate([0,-inlet_w/2-fanduct_shell/2,0])
     cube(size=[1,inlet_w+fanduct_shell,fanduct_shell*2+fanduct_h]);