1 files changed, 79 insertions, 0 deletions

diff --git a/multimixer.scad b/multimixer.scad
new file mode 100644
index 0000000..88fd6bf
--- a/dev/null
+++ b/multimixer.scad
@@ -0,0 +1,79 @@
+layer_height=.2; extrusion_width=.5;
+epsilon=.01;
+
+use <pushfittery.scad>;
+include <pushfit_data.scad>;
+
+module multimixer(
+ filament_d = 1.75,
+ liner_od = 4, liner_id = 2,
+ angle = 15,    // to the vertical (output) axis
+ inputs = 4,
+ minshell = 2*extrusion_width,
+ shell = 5*extrusion_width,
+ pf = pushfit_embeddest,
+ debug = true
+) {
+ 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;
+ 
+ sinsin = sin(angle)*sin(angular_step/2);
+ function l_to(d) = d*cos(asin(sinsin))/sinsin;
+ l_output = liner_od;
+ l_input = l_to(pushfit_d/2+minshell);
+ l_fork = l_to(liner_id/2);
+ l_narrow = l_to(liner_od/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();
+ }
+ 
+ //translate([pf_d(pf)/2+shell,0,0])
+ //translate([0,0,l_output+pushfit_h])
+ difference() {
+  hull() {
+   forinputs()
+    translate([0,0,l_input+pushfit_h]) mirror([0,0,1])
+    cylinder(d=pushfit_d+shell*2,h=epsilon,$fn=pushfit_d*fnd);
+   foroutput()
+    translate([0,0,l_output+pushfit_h]) {
+     cylinder(d=pushfit_d+shell*2,h=epsilon,$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,$fn=liner_od*fnd);
+    mirror([0,0,1]) translate([0,0,-epsilon])
+    cylinder(d1=(liner_id+liner_od)/2,d2=liner_id,h=liner_id,$fn=liner_od*fnd);
+   }
+   cylinder(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);
+  }
+  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);
+  }
+  if(debug) {
+   translate([0,0,-20/*TODO:*/])
+   rotate_extrude(angle=angular_step)
+   square([50,100]/*TODO:*/);
+  }
+ }
+
+}
+
+multimixer(debug=true);