| -rw-r--r-- | fanduct.scad | 12 |
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]) { |