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-rw-r--r--fanduct.scad12
1 files changed, 8 insertions, 4 deletions
diff --git a/fanduct.scad b/fanduct.scad
index 563920c..421dd5a 100644
--- a/fanduct.scad
+++ b/fanduct.scad
@@ -1,111 +1,115 @@
use <snapper.scad>;
extrusion_width=.5; layer_height=.2; // print parameters
epsilon=.005; // for finer cuts
-heater_w = 16; // heatblock width
-heater_l = 20; // heatblock length
-nozzle_offset=4.5; // nozzle offset from the edge of heatblock
+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 = sqrt(pow(heater_w/2,2)+pow(heater_l-nozzle_offset,2))+5; // inner radius
+fanduct_ir = heater_clearance+5; // inner radius
jet_angle = 60; // angular width of the jet
inlet_w = 12.5; // inlet width
inlet_h = 17; // inlet height
inlet_l = 7; // inlet length of protrusion (or depth of intrusion:))
inlet_away = 15; // how far away inlet is
hotend_clearance = 12;
snapper_d = 8; snapper_overlap=0.2; // snip snap
smooth_f = 120;
type="3jets"; // "3jets" ; // circular|3jets
module fanduct(type=type) {
// *** 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($fn=smooth_f)
translate([sh/2+fanduct_ir,sv/2])
scale([sh/smax,sv/smax])
circle(d=smax,$fn=4*smax);
}else if(what=="out") {
sh = fanduct_w; sv = fanduct_h;
smax = max(sh,sv);
rotate_extrude($fn=smooth_f)
translate([sh/2+fanduct_shell+fanduct_ir,sv/2+fanduct_shell])
scale([sh/smax,sv/smax])
circle(d=smax,$fn=4*smax);
}
}
// *** 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,$fn=6);
}
xyxyxy=concat(xyxy,[[0,0]]);
for(i=[0:1:len(xyxyxy)-2])
hull() for(j=[i,i+1]) pin(xyxyxy[j]);
}
module circus(what) {
if(what=="in") {
difference() {
rotate_extrude($fn=smooth_f)
polygon([
[0,-fanduct_elevation+fanduct_blowtarget+epsilon],
[fanduct_ir+fanduct_shell,fanduct_shell+fanduct_h/2],
[fanduct_ir+fanduct_shell+fanduct_w/2,0],
[0,-fanduct_elevation+fanduct_blowtarget-epsilon]]);
translate([0,0,-1])
cylinder(r=hotend_clearance,h=fanduct_h+2*fanduct_shell+2,$fn=smooth_f);
mirror([0,0,1])
translate([0,0,-epsilon])
cylinder(r=fanduct_ir+fanduct_shell+1,h=fanduct_elevation+.1+2);
}
}else if(what=="out") {
rotate_extrude($fn=smooth_f)
polygon([
[0,-fanduct_elevation+fanduct_blowtarget+epsilon],
[fanduct_ir+fanduct_shell+1,fanduct_h/2],
[fanduct_ir+fanduct_w/2+fanduct_shell+1,fanduct_shell],
[0,-fanduct_elevation+fanduct_blowtarget-epsilon]]);
}else if(what=="airguides") {
inr = fanduct_ir+fanduct_shell; our = inr+fanduct_w;
union() {
for(my=[0,1]) mirror([0,my,0]) {
guideline([
[-our,inlet_w/6],
[-inr*sin(60),inr*cos(60)]
]);
a0=30; as=15; a1=180;
for(a=[a0+as:as:a1]) {