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-rw-r--r--fanduct.scad9
1 files changed, 5 insertions, 4 deletions
diff --git a/fanduct.scad b/fanduct.scad
index 7fc1ff4..f4bb705 100644
--- a/fanduct.scad
+++ b/fanduct.scad
@@ -1,22 +1,23 @@
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
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
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
@@ -72,41 +73,41 @@ module fanduct(type=type) {
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],
+ [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-.1]]);
+ [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],
+ [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-.1]]);
+ [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]) {
f = as/(a1-a+as);
rotate([0,0,a]) guideline([[-inr-fanduct_w*f,0]]);