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-rw-r--r--another.scad22
1 files changed, 17 insertions, 5 deletions
diff --git a/another.scad b/another.scad
index 7e8a45f..342d70c 100644
--- a/another.scad
+++ b/another.scad
@@ -56,197 +56,209 @@ module the_extruder(
idler_v_tolerance=.5,
knob_bore_d_tolerance=.6,
st_nut_h_tolerance=.2,
st_nut_d_tolerance=.2,/* TODO: make it st_nut_w_tolerance */
st_screw_d_tolerance=.3,
what="lever", // lever|body|knob|springpad|*
left=false,
vitamins = true,
supports = false, bridges = true,
tensioner = true,
debug = false
) {
fnd = 2*PI; fnr = 2*fnd;
lever_shell = mount_screwhead_h+0.5;
lever_thickness=max(spring_d+spring_d_clearance+layer_height*8,idler_h+idler_v_tolerance+2*lever_shell);
lsd = idler_d-idler_clearance*2;
longwing=gearbox_d/2+spring_d/2+lsd/2;
h_ = (pulley_d+idler_d)/(2*sqrt(2));
ri = sqrt( pow(h_,2) + pow(mount_d/2-h_,2) );
spring_dl = idler_travel*longwing/ri;
filament_elevation=protrusion_h+pulley_elevation+teeth_elevation;
ls_z = filament_elevation; // leverspace mid-z
body_h = max(protrusion_h+bore_l,mount_screw_l-mounthole_depth/2+mount_screwhead_h,ls_z*2);
ls_h = lever_thickness+lever_v_clearance; // leverspace height
module mirrorleft() {
mirror([left?0:1,0,0]) children();
}
module place_idler() {
rotate([0,0,45])
translate([(pulley_d+idler_d)/2,0,0])
children();
}
module finger_indent(d=lever_thickness,depth/*=1*/,r/*=15*/) {
if(depth) {
hh = (-4*pow(depth,2)+pow(d,2))/(8*depth);
rr = depth+hh;
translate([0,0,hh]) sphere(r=rr,$fn=fnr*rr);
}else if(r) {
hh=sqrt(pow(r,2)-pow(d,2)/4);
translate([0,0,hh]) sphere(r=r,$fn=fnr*r);
}
}
% if(vitamins) mirrorleft() {
translate([0,0,-epsilon]) mirror([0,0,1]) cylinder(d=gearbox_d,h=1,$fn=60);
for(zr=[0:90:359]) rotate([0,0,zr]) translate([mount_d/2,0,0])
cylinder(d=mount_screw_d,h=20,$fn=30);
translate([0,0,-epsilon]) cylinder(d=protrusion_d,h=protrusion_h,$fn=30);
translate([0,0,protrusion_h]) {
difference() {
cylinder(d=bore_d,h=bore_l,$fn=30);
translate([-bore_d/2-1,bore_dd-bore_d/2,-1])
cube([bore_d+2,bore_d/2,bore_l+2]);
}
translate([0,0,pulley_elevation]) {
cylinder(d=pulley_d,h=pulley_h,$fn=30);
translate([0,0,teeth_elevation]) {
place_idler() {
cylinder(d=idler_d,h=idler_h,center=true,$fn=30);
cylinder(d=idler_screw_d,h=lever_thickness+2,center=true,$fn=30);
}//place idler
// filament path
rotate([0,0,45]) translate([(pulley_d-filament_path_d)/2,0,0]) {
rotate([90,0,0]) cylinder(d=filament_d,h=gearbox_d*2,center=true,$fn=15);
rotate([-90,0,0])
translate([0,0,mount_d/sqrt(2)/2+mount_screw_d])
pushfit(pf);
}
}//translate teeth
}//translate pulley
}//translate protrusion
}//vitamins
module lever() {
translate([0,0,protrusion_h+pulley_elevation+teeth_elevation]) {
difference() {
union() {
hull() {
place_idler()
cylinder(d=lsd,h=lever_thickness,center=true,$fn=60);
translate([mount_d/2,0,0])
cylinder(d=lsd,h=lever_thickness,center=true,$fn=60);
}//hull
hull() {
translate([mount_d/2,0,0])
cylinder(d=lsd,h=lever_thickness,center=true,$fn=60);
translate([mount_d/2,-longwing,0]) rotate([0,90,0])
cylinder(d=lever_thickness,h=lsd,center=true,$fn=60);
}//hull
}//union
// filament path
- place_idler() translate([-(idler_d+filament_path_d)/2,0,0]) rotate([90,0,0]) {
- cylinder(d=filament_path_d,h=3*gearbox_d,center=true,$fn=30);
- translate([0,-filament_path_d/2/sqrt(2),0]) rotate([0,0,45])
- cube(size=[filament_path_d/2,filament_path_d/2,3*gearbox_d],center=true);
- }
+ place_idler() {
+ translate([-(idler_d+filament_path_d)/2,0,0]) rotate([90,0,0]) {
+ cylinder(d=filament_path_d,h=3*gearbox_d,center=true,$fn=30);
+ translate([0,-filament_path_d/2/sqrt(2),0]) rotate([0,0,45])
+ cube(size=[filament_path_d/2,filament_path_d/2,3*gearbox_d],center=true);
+ }//rotate translate
+ translate([-(idler_d+filament_path_d)/2,0,0])
+ rotate([90,0,0])
+ translate([0,0,
+ sqrt(2)*(mount_d-pulley_d+filament_path_d+lsd)/2
+ ]) {
+ cylinder(d1=filament_path_d,d2=2*filament_path_d,
+ h=filament_path_d,$fn=2*filament_path_d*fnd);
+ translate([0,0,filament_path_d-epsilon])
+ cylinder(d=2*filament_path_d,h=lsd,$fn=2*filament_path_d*fnd);
+ }
+ }//place_idler
// idler space and mounting hole
place_idler() {
difference() {
cylinder(d=idler_d+idler_clearance*2,h=idler_h+idler_v_tolerance,center=true,$fn=60);
if(supports) for(y=[-lsd/2+extrusion_width:(lsd-2*extrusion_width)/3:lsd/2-extrusion_width])
translate([-lsd/2-1,y-extrusion_width/2,-idler_h/2-idler_v_tolerance/2-1])
cube(size=[lsd+2,extrusion_width,idler_h+idler_v_tolerance+2]);
}
cylinder(d=idler_screw_d,h=lever_thickness+2,center=true,$fn=30);
translate([0,0,lever_thickness/2-idler_screwhead_h])
cylinder(d=idler_screwhead_d,h=idler_screwhead_h+1,$fn=fnd*idler_screwhead_d);
}
// mounting screw hole
translate([mount_d/2,0,0])
cylinder(d=mount_screw_d+mount_screw_d_tolerance,h=lever_thickness+2,center=true,$fn=fnd*mount_screw_d);
// lever end
translate([mount_d/2,0,0]) rotate([0,90,0]) {
translate([0,-longwing,lsd/2]) finger_indent(d=lever_thickness-1,r=15);
translate([0,-longwing,0])
mirror([0,0,1])
difference() {
cylinder(d=spring_d+spring_d_clearance,h=lsd,$fn=fnd*(spring_d+spring_d_clearance));
sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4);
}
}//rotate-translate
}//difference
// bridging patch
if(bridges) place_idler()
translate([0,0,lever_thickness/2-mount_screwhead_h])
mirror([0,0,1])
cylinder(d=mount_screwhead_d,h=layer_height);
}//translate
}//lever module
module body() {
difference() {
union() {
cylinder(d=gearbox_d,h=body_h,$fn=fnd*gearbox_d);
// finger and spring support
fsw = gearbox_d-(gearbox_d-mount_d)/2-spring_lc;
translate([-gearbox_d/2,0,0]) difference() {
union() {
hull() {
translate([0,-longwing,ls_z])
rotate([0,90,0])
cylinder(d=lever_thickness,h=fsw,$fn=fnd*lever_thickness);
hh=body_h-ls_z;
translate([0,0,ls_z-lever_thickness/2])
mirror([0,1,0]) cube(size=[fsw,longwing-hh+lever_thickness/sqrt(2),hh+lever_thickness/2]);
hhh=ls_z;
translate([0,0,0])
mirror([0,1,0]) cube(size=[fsw,longwing-hhh+lever_thickness/sqrt(2),hhh+lever_thickness/2]);
}
}
translate([0,-longwing,ls_z]) rotate([0,-90,0]) {
if(!tensioner) finger_indent(d=lever_thickness-1,r=15); else {
mirror([0,0,1]) {
translate([0,0,st_thickshell])
hull() for(o=[0,spring_d]) translate([0,-o,0])
rotate([0,0,30])
cylinder(d=st_nut_d+st_nut_d_tolerance,h=st_nut_h+st_nut_h_tolerance,$fn=6);
translate([0,0,-1]) cylinder(d=st_screw_d+st_screw_d_tolerance,h=fsw+2,$fn=fnd*(st_screw_d+st_screw_d_tolerance));
bigd = spring_d+spring_d_clearance;
hf = (bigd-st_screw_d-st_screw_d_tolerance)/2;
translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell-epsilon])
cylinder(d1=st_screw_d+st_screw_d_tolerance,d2=bigd,
h=hf+epsilon, $fn=fnd*bigd);
translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+hf-epsilon])
cylinder(d=bigd,h=fsw+1,$fn=fnd*bigd);
}
}
}
} // translate
// pushfit bracket
translate([0,0,filament_elevation])
rotate([0,0,45]) translate([pulley_d/2,0,0])
rotate([-90,0,0])
translate([0,0,mount_d/sqrt(2)/2+mount_screw_d-gearbox_d/2/*TODO:*/])
cylinder(r=min(body_h-filament_elevation,filament_elevation)/sin(60)-epsilon,h=pf_h(pf)+gearbox_d/2/*TODO:*/,$fn=6);
}//union (first child of difference)
// protrusion
translate([0,0,-1])
cylinder(d=protrusion_d+protrusion_tolerance_h,h=protrusion_h+protrusion_tolerance_v+1,$fn=fnd*(protrusion_d+protrusion_tolerance_h));
// mount screw holes
for(zr=[0:90:359]) rotate([0,0,zr]) translate([mount_d/2,0,0]) {
translate([0,0,mount_screw_l-mounthole_depth/2-(bridges?layer_height:-epsilon)])
mirror([0,0,1])
cylinder(d=mount_screw_d+mount_screw_d_tolerance,
h=mount_screw_l-mounthole_depth/2+1,
$fn=fnd*(mount_screw_d+mount_screw_d_tolerance));
translate([0,0,mount_screw_l-mounthole_depth/2])
cylinder(d=mount_screwhead_d,h=body_h+1,$fn=fnd*mount_screwhead_d);