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-rw-r--r--fanduct.scad66
1 files changed, 61 insertions, 5 deletions
diff --git a/fanduct.scad b/fanduct.scad
index 52aee0e..a17b261 100644
--- a/fanduct.scad
+++ b/fanduct.scad
@@ -1,30 +1,30 @@
use <snapper.scad>;
extrusion_width=.5; layer_height=.2; // print parameters
epsilon=.005; // for finer cuts
-type="circular"; // circular|3jets
+type="simple"; // circular|3jets
ductshape="square"; // square|round
dual=true; // dual or single
nozzles_apart = 18; // distance between nozzles for dual hotend
space_behind_nozzle = 10; // space behind the nozzle where we're allowed to go
// without the fear of hitting carriage
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;
function hypothenuse(a,b) = sqrt(pow(a,2)+pow(b,2));
silicone_shell = 2;
heater_clearance = dual
? max(20,15.5) - 4.5 + silicone_shell
: 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
@@ -83,51 +83,83 @@ module fanduct(type=type,ductshape=ductshape,dual=dual) {
}
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);
}
}
}
}
+ module dual_simple() {
+ for(my=[0,1]) mirror([0,my,0])
+ if(what=="in") {
+ sh = fanduct_w+2*fanduct_shell; sv = fanduct_h+2*fanduct_shell;
+ translate([0,nozzles_apart/2,0])
+ intersection() {
+ rotate_extrude($fn=smooth_f)
+ translate([fanduct_ir,0]) square([sh,sv]);
+ translate([-fanduct_ir-sh-1,0,-1])
+ cube(size=[fanduct_ir+sh+2,fanduct_ir+sh+2,sv+2]);
+ }
+ translate([-fanduct_ir-sh,-epsilon,0])
+ cube(size=[sh,nozzles_apart/2+2*epsilon,sv]);
+ translate([0,sh/2+fanduct_ir+nozzles_apart/2,0]) cylinder(d=sh,h=sv,$fn=36);
+ }else if(what=="out") {
+ sh = fanduct_w; sv = fanduct_h;
+ translate([0,nozzles_apart/2,fanduct_shell])
+ intersection() {
+ rotate_extrude($fn=smooth_f)
+ translate([fanduct_ir+fanduct_shell,0]) square([sh,sv]);
+ translate([-fanduct_ir-2*fanduct_shell-sh-1,-1,0])
+ cube(size=[fanduct_ir+2*fanduct_shell+sh+2,fanduct_ir+2*fanduct_shell+sh+2,sv]);
+ }
+ translate([-fanduct_ir-fanduct_shell-sh,-epsilon,fanduct_shell])
+ cube(size=[sh,nozzles_apart/2+2*epsilon,sv]);
+ translate([0,sh/2+fanduct_shell+fanduct_ir+nozzles_apart/2,fanduct_shell])
+ cylinder(d=sh,h=sv,$fn=36);
+ }
+ }
- if(dual) dual();
- else single();
+ if(dual) {
+ if(type=="simple")
+ dual_simple();
+ else dual();
+ }else single();
}
// *** bumps for easier position adjustments in line with hotend
module marks(what) {
if(what=="in") {
for(y=[-1,1]) translate([0,dual?y*nozzles_apart/2:0,0])
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,$fn=6);
}
xyxyxy=concat(xyxy,[[0,dual?nozzles_apart/2:0]]);
@@ -234,50 +266,74 @@ module fanduct(type=type,ductshape=ductshape,dual=dual) {
for(s=[-1,1]) translate([0,s*nozzles_apart/2,-1])
rotate([0,0,180/cfn]) cylinder(r=hotend_clearance/cos(180/cfn),h=fanduct_h+2*fanduct_shell+2,$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] ]);
}
}
}
}
- if(dual) dual(what);
- else if(type=="circular") circus(what);
+ 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 dual(what);
+ }else if(type=="circular") circus(what);
else if(type=="3jets") 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,