add liner tolerance

1 files changed, 8 insertions, 5 deletions

diff --git a/multimixer.scad b/multimixer.scad
index 80f41f1..c7b3489 100644
--- a/multimixer.scad
+++ b/multimixer.scad
@@ -11,27 +11,30 @@ module multimixer(
  inputs = 4,
  minshell = 2*extrusion_width,
  shell = 5*extrusion_width,
  pf = pushfit_embeddest,
  debug = 0,     // how many inputs -1 the debug cutout spans
  print = false,
+
+ liner_d_tolerance=.2
 ) {
  fnd = 4*PI; fnr = 2*fnd;
  
  pushfit_d = pf_d(pf);
  pushfit_h = pf_h(pf);
  
  angular_step = 360/inputs;
  inputogon_angle = 180*(inputs-2)/inputs;
+ lod = liner_od+liner_d_tolerance; // effective liner diameter
  
  sinsin = sin(angle)*sin(angular_step/2);
  function l_to(d) = d*cos(asin(sinsin))/sinsin;
- l_output = liner_od;
+ l_output = lod;
  l_input = l_to(pushfit_d/2+minshell);
  l_fork = l_to(liner_id/2);
- l_narrow = l_to(liner_od/2+minshell);
+ l_narrow = l_to(lod/2+minshell);
  
  module forinputs() {
   for(zr=[0:angular_step:359]) rotate([0,0,zr]) rotate([0,angle,0]) children();
  }//forinputs module
  module foroutput() {
   rotate([180,0,0]) children();
@@ -73,21 +76,21 @@ module multimixer(
      cylinder(d=pushfit_d+shell*2,h=epsilon,$fn=pushfit_d*fnd);
     }
   }
   forinputs() {
    translate([0,0,l_input]) pushfit(pf);
    translate([0,0,l_narrow]) {
-    cylinder(d=liner_od,h=l_input+1-l_narrow,$fn=liner_od*fnd);
+    cylinder(d=lod,h=l_input+1-l_narrow,$fn=lod*fnd);
     mirror([0,0,1]) translate([0,0,-epsilon])
-    cylinder(d1=(liner_id+liner_od)/2,d2=liner_id,h=liner_id,$fn=liner_od*fnd);
+    cylinder(d1=(liner_id+lod)/2,d2=liner_id,h=liner_id,$fn=lod*fnd);
    }
    cylinder(d=liner_id,h=l_input+epsilon,$fn=liner_id*fnd);
   }
   foroutput() {
    translate([0,0,l_output]) pushfit(pf);
-   cylinder(d=liner_od,h=l_input+1,$fn=liner_od*fnd);
+   cylinder(d=lod,h=l_output+1,$fn=lod*fnd);
   }
   hull() {
    forinputs()
     translate([0,0,l_fork]) cylinder(d=liner_id,h=epsilon,$fn=liner_id*fnd);
    foroutput()
     cylinder(d=liner_id,h=epsilon,$fn=liner_id*fnd);