| -rw-r--r-- | .gitignore | 2 | ||||
| -rw-r--r-- | Makefile | 12 | ||||
| -rw-r--r-- | fanduct-3jets.scad | 2 | ||||
| -rw-r--r-- | fanduct-circular.scad | 2 | ||||
| -rw-r--r-- | fanduct.scad | 241 | ||||
| -rw-r--r-- | snapper.scad | 27 |
6 files changed, 286 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..edc57ed --- a/dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +/Makefile.local +*.stl diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..3afaa64 --- a/dev/null +++ b/Makefile @@ -0,0 +1,12 @@ +-include Makefile.local + +OPENSCAD_APP?=/Applications/OpenSCAD.app +OPENSCAD_BIN?=${OPENSCAD_APP}/Contents/MacOS/OpenSCAD + +default: fanduct-circular.stl fanduct-3jets.stl + +fanduct-%.stl: fanduct-%.scad fanduct.scad + + +%.stl: %.scad + ${OPENSCAD_BIN} ${OPENSCAD_FLAGS} -o "$@" "$<" diff --git a/fanduct-3jets.scad b/fanduct-3jets.scad new file mode 100644 index 0000000..cd88ab0 --- a/dev/null +++ b/fanduct-3jets.scad @@ -0,0 +1,2 @@ +use <fanduct.scad>; +fanduct(type="3jets"); diff --git a/fanduct-circular.scad b/fanduct-circular.scad new file mode 100644 index 0000000..caaf6e4 --- a/dev/null +++ b/fanduct-circular.scad @@ -0,0 +1,2 @@ +use <fanduct.scad>; +fanduct(type="circular"); diff --git a/fanduct.scad b/fanduct.scad new file mode 100644 index 0000000..d711166 --- a/dev/null +++ b/fanduct.scad @@ -0,0 +1,241 @@ +use <snapper.scad>; +extrusion_width=.5; layer_height=.2; // print parameters + +epsilon=.005; // for finer cuts + +heater_w = 16; // heatblock width +heater_l = 20; // heatblock length +nozzle_offset=4.5; // nozzle offset from the edge of heatblock + +fanduct_elevation = 3; // fanduct elevation above nozzle tip +fanduct_h = 6; // inner height of the duct +fanduct_w = 6; // inner width of the duct +fanduct_shell=1.2; // shell thickness +fanduct_ir = sqrt(pow(heater_w/2,2)+pow(heater_l-nozzle_offset,2))+5; // inner radius + +jet_angle = 60; // angular width of the jet + +inlet_w = 12.5; // inlet width +inlet_h = 17; // inlet height +inlet_l = 7; // inlet length of protrusion (or depth of intrusion:)) +inlet_away = 15; // how far away inlet is + +hotend_clearance = 12; + +snapper_d = 8; snapper_overlap=0.2; // snip snap + +smooth_f = 120; + +type="3jets"; // "3jets" ; // circular|3jets + + +module fanduct(type=type) { + + // *** duct is all around! + module duct(what) { + if(what=="in") { + rotate_extrude($fn=smooth_f) + translate([fanduct_ir,0]) + square([fanduct_w+2*fanduct_shell,fanduct_h+2*fanduct_shell]); + }else if(what=="out") { + rotate_extrude($fn=smooth_f) + translate([fanduct_ir+fanduct_shell,fanduct_shell]) + union() { + square([fanduct_w,fanduct_h/2]); + translate([fanduct_w/2,fanduct_h-fanduct_w/2]) + rotate([0,0,90]) circle(d=fanduct_w,$fn=36); + } + } + } + + // *** bumps for easier position adjustments in line with hotend + module marks(what) { + if(what=="in") { + for(y=[-1,1]) translate([0,y*(fanduct_ir+fanduct_shell+fanduct_w/2),fanduct_shell*2+fanduct_h]) + 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_ir+fanduct_shell,fanduct_shell+fanduct_h/2], + [fanduct_ir+fanduct_shell,0], + [0,-fanduct_elevation-.1]]); + translate([0,0,-1]) + cylinder(r=hotend_clearance,h=fanduct_h+2*fanduct_shell+2,$fn=smooth_f); + mirror([0,0,1]) + translate([0,0,-epsilon]) + cylinder(r=fanduct_ir+fanduct_shell+1,h=fanduct_elevation+.1+2); + } + }else if(what=="out") { + difference() { + rotate_extrude($fn=smooth_f) + polygon([ + [0,-fanduct_elevation], + [fanduct_ir+fanduct_shell+1,fanduct_h/2], + [fanduct_ir+fanduct_shell+1,fanduct_shell], + [0,-fanduct_elevation-.1]]); + circus("airguides"); + } + }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]]); + } + guideline([ + [-our+fanduct_w*cos(30)*3/4,fanduct_w*sin(30)*3/4], + [-inr*cos(10),inr*sin(10)] + ]); + } + }/*union*/ + }/*airguides*/ + } + + module jets(what) { + od = fanduct_h/2+fanduct_shell; + difference() { + for(a=[0:120:359]) rotate([0,0,a]) { + if(what=="in") { + hull() { + translate([fanduct_ir+od/2,0,od/2]) + rotate([90,0,0]) + cylinder(d=od,h=2*(fanduct_ir+fanduct_shell+fanduct_w/2)*sin(jet_angle/2)-3,center=true,$fn=36); + translate([0,0,-fanduct_elevation]) sphere(r=.5); + } + }else if(what=="out") { + hull() { + translate([fanduct_ir+od/2,0,od/2]) + rotate([90,0,0]) + cylinder(d=od-2*fanduct_shell,h=2*(fanduct_ir+fanduct_shell+fanduct_w/2)*sin(jet_angle/2)-3-2*fanduct_shell,center=true); + translate([0,0,-fanduct_elevation]) sphere(r=.2); + } + + type="3jets"; + } + } + if(what=="in") { + translate([0,0,-fanduct_elevation-2+epsilon]) + cylinder(r=fanduct_ir+fanduct_shell*2+fanduct_w+1,h=fanduct_elevation+2); + translate([0,0,-hotend_clearance]) + rotate([0,0,30]) + cylinder(r1=hotend_clearance*2,r2=0,h=hotend_clearance*2,$fn=6); + } + } + } + + 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]) { + cube(size=[inlet_h,inlet_w,inlet_l+fanduct_shell]); + // 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, + extrusion_width, + inlet_l+fanduct_shell+inlet_away+fanduct_w/2]); + } + hull() { + placeit() translate([-fanduct_shell,-inlet_w/2-fanduct_shell/2,0]) + cube(size=[inlet_h+fanduct_shell,inlet_w+fanduct_shell,fanduct_shell]); + translate([-fanduct_ir-fanduct_shell-fanduct_w/2,0,0]) + translate([0,-inlet_w/2-fanduct_shell/2,0]) + cube(size=[1,inlet_w+fanduct_shell,fanduct_shell*2+fanduct_h]); + } + }else if(what=="out") { + placeit() translate([fanduct_shell,-inlet_w/2+fanduct_shell,0]) + cube(size=[inlet_h-2*fanduct_shell,inlet_w-2*fanduct_shell,inlet_l+fanduct_shell+1]); + hull() { + placeit() translate([fanduct_shell,-inlet_w/2+fanduct_shell,0]) + cube(size=[inlet_h-2*fanduct_shell,inlet_w-2*fanduct_shell,fanduct_shell]); + translate([-fanduct_ir-fanduct_shell-fanduct_w/2,0,fanduct_shell]) + translate([0,-inlet_w/2,0]) + cube(size=[1,inlet_w,fanduct_h]); + } + } + } + + // *** DUCT TAILS!!! WOO-OO! (every day they're out there making duct tails…) + module tails(what) { + if(what=="in") { + for(mx=[0,1]) mirror([mx,0,0]) + translate([fanduct_ir+fanduct_shell+fanduct_w/2,0,fanduct_shell+fanduct_h]) + rotate([90,0,90]) + translate([0,0,-snapper_d/2]) + snapper(d=snapper_d,o=snapper_overlap,side=0,l=fanduct_h+fanduct_shell); + } + } + + module parts(what) { + union() { + duct(what); + marks(what); + output(what); + intake(what); + tails(what); + } + } + + difference() { + parts("in"); + parts("out"); + } + +} + +view=""; // hcut|vcut|* + +hinfinity=4*(fanduct_ir+fanduct_shell*2+fanduct_w+inlet_away); +vinfinity=2*(fanduct_shell*2+fanduct_h+inlet_h); +if(view=="hcut") { + difference() { + fanduct(); + translate([-hinfinity/2,-hinfinity/2,fanduct_shell+fanduct_h/2]) + cube(size=[hinfinity,hinfinity,vinfinity]); + } +}else if(view=="vcut") { + difference() { + fanduct(); + translate([-hinfinity/2,0,-vinfinity/2]) + cube(size=[hinfinity,hinfinity,vinfinity]); + } +}else fanduct(); diff --git a/snapper.scad b/snapper.scad new file mode 100644 index 0000000..0c258ca --- a/dev/null +++ b/snapper.scad @@ -0,0 +1,27 @@ +/* d - diameter, o - overlap (fraction) */ +function snapper_apart(d,o) = d*(1-o); +module snapper(d,o,l=-1,side=0) { + snapper_apart = d*(1-o); + l_ = (l<0) ? d : l; + lw = d/2; + sfn = 8*d; + module lm() { + translate([-lw/2,0,0]) hull() { + cube(size=[lw,l_-d/2,d]); + translate([lw/2,l_,0]) cylinder(d=d/8,h=d,$fn=sfn); + } + } + if(side==0) { + translate([0,l_,d/2]) sphere(d=d,$fn=sfn); + lm(); + }else if(side==1) { + difference() { + for(x=[-1,1]) translate([x*snapper_apart(d,o),0,0]) { + translate([0,l_,d/2]) sphere(d=d,$fn=sfn); + lm(); + } + translate([0,l_,d/2]) sphere(d=d,$fn=sfn); + } + }else + echo("ERROR: what side?"); +} |