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-rw-r--r--fanduct.scad96
1 files changed, 66 insertions, 30 deletions
diff --git a/fanduct.scad b/fanduct.scad
index 3e2a15e..b9689c9 100644
--- a/fanduct.scad
+++ b/fanduct.scad
@@ -7,88 +7,124 @@ function hypothenuse(a,b) = sqrt(pow(a,2)+pow(b,2));
silicone_shell = 2;
heater_clearance = max(
hypothenuse(16/2 +silicone_shell, 20-4.5 +silicone_shell), // E3D v6
hypothenuse(11.5-4.5 +silicone_shell, 15.5 +silicone_shell) // E3D volcano
);
fanduct_elevation = 3; // fanduct elevation above nozzle tip
fanduct_blowtarget = -2; // what to blow at
fanduct_h = 6; // inner height of the duct
fanduct_w = 7; // inner width of the duct
fanduct_shell=1.2; // shell thickness
fanduct_ir = heater_clearance+5; // inner radius
jet_angle = 60-2; // angular width of the jet
inlet_w = 12.5; // inlet width
inlet_h = 17; // inlet height
inlet_short_l = 7; // inlet length of protrusion (or depth of intrusion:))
inlet_away = 15; // how far away inlet is
inlet_long_l = inlet_short_l+inlet_h;
hotend_clearance = heater_clearance;
+nozzles_apart = 18; // distance between nozzles for dual hotend
+space_behind_nozzle = 15; // space behind the nozzle where we're allowed to go
+ // without the fear of hitting carriage
+
snapper_d = 8; snapper_overlap=0.2; // snip snap
smooth_f = 120;
-type="3jets"; // "3jets" ; // circular|3jets
-ductshape="square"; // square|round
-
+type="circular"; // circular|3jets
+ductshape="square"; // square|round
+dual=true; // dual or single
-module fanduct(type=type,ductshape=ductshape) {
+to_midduct = fanduct_ir+fanduct_shell+fanduct_w/2;
+dual_spots = [ [+space_behind_nozzle, -(to_midduct+nozzles_apart/2)],
+ [- to_midduct, -(to_midduct+nozzles_apart/2)],
+ [- to_midduct, 0] ];
+module fanduct(type=type,ductshape=ductshape,dual=dual) {
// *** duct is all around!
module duct(what) {
- if(what=="in") {
- sh = fanduct_w+2*fanduct_shell; sv = fanduct_h+2*fanduct_shell;
- smax = max(sh,sv);
- rotate_extrude($fn=smooth_f)
- if(ductshape=="round")
- translate([sh/2+fanduct_ir,sv/2])
- scale([sh/smax,sv/smax])
- circle(d=smax,$fn=4*smax);
- else if(ductshape=="square")
- translate([fanduct_ir,0])
- square([sh,sv]);
- }else if(what=="out") {
- sh = fanduct_w; sv = fanduct_h;
- smax = max(sh,sv);
- rotate_extrude($fn=smooth_f)
- if(ductshape=="round")
- translate([sh/2+fanduct_shell+fanduct_ir,sv/2+fanduct_shell])
- scale([sh/smax,sv/smax])
- circle(d=smax,$fn=4*smax);
- else if(ductshape=="square")
- translate([fanduct_ir+fanduct_shell,fanduct_shell])
- union() {
- square([sh,sv/2]);
- translate([sh/2,sv/2])
+ module single() {
+ if(what=="in") {
+ sh = fanduct_w+2*fanduct_shell; sv = fanduct_h+2*fanduct_shell;
+ smax = max(sh,sv);
+ rotate_extrude($fn=smooth_f)
+ if(ductshape=="round")
+ translate([sh/2+fanduct_ir,sv/2])
scale([sh/smax,sv/smax])
- circle(d=smax,$fn=36);
- }
+ circle(d=smax,$fn=4*smax);
+ else if(ductshape=="square")
+ translate([fanduct_ir,0])
+ square([sh,sv]);
+ }else if(what=="out") {
+ sh = fanduct_w; sv = fanduct_h;
+ smax = max(sh,sv);
+ rotate_extrude($fn=smooth_f)
+ if(ductshape=="round")
+ translate([sh/2+fanduct_shell+fanduct_ir,sv/2+fanduct_shell])
+ scale([sh/smax,sv/smax])
+ circle(d=smax,$fn=4*smax);
+ else if(ductshape=="square")
+ translate([fanduct_ir+fanduct_shell,fanduct_shell])
+ union() {
+ square([sh,sv/2]);
+ translate([sh/2,sv/2])
+ scale([sh/smax,sv/smax])
+ circle(d=smax,$fn=36);
+ }
+ }
+ }
+ module dual() {
+ module hulls(spots=dual_spots) {
+ for(my=[0,1]) mirror([0,my,0]) for(pn=[0:1:len(spots)-2]) hull() {
+ for(p=[spots[pn],spots[pn+1]]) translate(p) children();
+ }
+ }
+ if(what=="in") {
+ hulls() cylinder(d=fanduct_w+2*fanduct_shell,h=fanduct_h+2*fanduct_shell);
+ }else if(what=="out") {
+ sh = fanduct_w; sv = fanduct_h;
+ smax = max(sh,sv);
+ translate([0,0,fanduct_shell]) hulls() {
+ cylinder(d=fanduct_w,h=fanduct_h/2);
+ translate([0,0,fanduct_h/2])
+ scale([sh/smax,sh/smax,sv/smax])
+ intersection() {
+ sphere(d=smax,$fn=36);
+ translate([0,0,-1])
+ cylinder(d=smax+2,h=smax+2,$fn=36);
+ }
+ }
+ }
}
+
+ if(dual) dual();
+ else single();
}
// *** bumps for easier position adjustments in line with hotend
module marks(what) {
if(what=="in") {
for(y=[-1,1])
hull() for(z=[0,-fanduct_shell-fanduct_h/2])
translate([0,y*(fanduct_ir+fanduct_shell+fanduct_w/2),fanduct_shell*2+fanduct_h+z])
rotate([90,0,0]) {
cylinder(r=fanduct_shell,h=fanduct_w,center=true,$fn=30);
for(z=[-1,1]) translate([0,0,z*fanduct_w/2])
sphere(r=fanduct_shell,$fn=30);
}
}
}
// *** output
module output(what,type=type) {
module guideline(xyxy) {
module pin(xy) {
translate([xy[0],xy[1],0])
cylinder(d=2*extrusion_width,h=2*fanduct_shell+inlet_h,$fn=6);
}
xyxyxy=concat(xyxy,[[0,0]]);