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-rw-r--r--another.scad6
1 files changed, 3 insertions, 3 deletions
diff --git a/another.scad b/another.scad
index 50b3a84..6afa9ef 100644
--- a/another.scad
+++ b/another.scad
@@ -1,117 +1,117 @@
draft=true;
layer_height=0.2; extrusion_width=0.4;
epsilon=0.01;
$fs=0.0125;
use <pushfittery.scad>;
include <pushfit_data.scad>;
module the_extruder(
// motor properties
gearbox_d = 36,
mount_d = 28, // the distance between opposite mounting holes
mounthole_depth = 5,
protrusion_d = 22, protrusion_h = 2.2, // the dimensions of the protrusion on top of gearbox
bore_d = 8, bore_l = 17.6,
bore_dd = 7,
// pulley properties
pulley_d = 11.5, pulley_h=10,
pulley_elevation = 1, // pulley elevation above the protrusion
teeth_elevation = 7.5, // distance from the bottom of the pulley to its teeth
filament_offset = (8.25-(3.0+3.5)/2) - 11.5/2 + 1.75/2,
// idler properties
idler_d = 9.5, idler_h = 4, idler_id = 3, // idler dimensions: outer and inner diameters and height
// spring properties
spring_d = 10, spring_lc = 9.6, // spring diameter and compressed length
// filament path properties
filament_d = 1.75,
filament_path_d = 2,
filament_guide_d = 4, // PTFE filament guide diameter
// knob properties
knob_h = 10,
knob_bore_l = 4,
knob_indent_d = 4,
knob_indents = 12,
// spring tensioner
st_nut_d = 9, st_nut_h = 4,
st_screw_d = 5,
st_thickshell = 8*extrusion_width, st_thinshell = 4*extrusion_width,
// screw it
mount_screw_d = 3.1, mount_screw_l = 20,
mount_screwhead_d=6, mount_screwhead_h=3,
idler_screw_d = 3,
idler_screwhead_d=6, idler_screwhead_h=3,
pf = pushfit_embeddest,
pf_shell = max(3*layer_height,3*extrusion_width),
pf_smooth = true,
// empty spaces
idler_travel = 3, // how far should idler travel when pressed
idler_clearance=1,
- pulley_clearance=2,
+ pulley_d_clearance=2,
lever_v_clearance=.7, // vertical clearance for the lever
spring_d_clearance=1,
protrusion_tolerance_h=.5, // horizontal tolerance for the motor protrusion
protrusion_tolerance_v=.5, // vertical tolerance for the motor protrusion
mount_screw_d_tolerance=.4,
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=.5,
what="lever", // lever|body|knob|springpad|*
left=false,
vitamins = true,
supports = false, bridges = true,
tensioner = true,
debug = false
) {
fnd = 2*PI; fnr = 2*fnd;
idler_filament_offset = filament_path_d/2; // -filament_offset;
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,$fn=30);
translate([-bore_d/2-1,bore_dd-bore_d/2,-1])
cube([bore_d+2,bore_d/2,bore_l+2]);
}
@@ -248,192 +248,192 @@ module the_extruder(
}
}
}
} // translate
// pushfit bracket
translate([0,0,filament_elevation])
rotate([0,0,45]) translate([pulley_d/2+filament_offset,0,0])
rotate([-90,0,0])
translate([0,0,mount_d/sqrt(2)/2+mount_screw_d-gearbox_d/2/*TODO:*/]) {
pfbl = pf_h(pf)+gearbox_d/2; //TODO:
if(pf_smooth) {
pfbd = pf_d(pf)+2*pf_shell;
hull() {
cylinder(d=pfbd,h=pfbl,$fn=pfbd*fnd);
translate([-epsilon/2,0,0]) {
cube(size=[epsilon,filament_elevation,pfbl-filament_elevation+pfbd/2]);
mirror([0,1,0])
cube(size=[epsilon,body_h-filament_elevation,pfbl-body_h+filament_elevation+pfbd/2]);
}//translate
}//hull
}else{
pfb2a = pf_d(pf)+2*pf_shell; pfba = pfb2a/2;
pfbd = pfb2a/cos(30);
pfbs = pfb2a*tan(30);
cylinder(d=pfbd,h=pfbl,$fn=6);
translate([-pfbs/2,0,0]) {
hull() {
translate([0,-pfba,0]) cube(size=[pfbs,pfb2a,pfbl]);
cube(size=[pfbs,filament_elevation,pfbl-filament_elevation+pfba]);
mirror([0,1,0])
cube(size=[pfbs,body_h-filament_elevation,pfbl-body_h+filament_elevation+pfba]);
}//hull
}//translate*/
}//if(pf_smooth)
}//translate rotate translate rotate translate
}//union (first child of difference)
// protrusion
translate([0,0,-1])
cylinder(d=protrusion_d+protrusion_tolerance_h,h=protrusion_h+protrusion_tolerance_v+1,$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);
}//for
// pushfit
translate([0,0,filament_elevation])
rotate([0,0,45]) translate([pulley_d/2+filament_offset,0,0])
rotate([-90,0,0])
translate([0,0,mount_d/sqrt(2)/2+mount_screw_d+epsilon])
rotate([0,0,180]) {
pushfit(pf);
cylinder(d=filament_guide_d,h=gearbox_d,center=true,$fn=fnd*filament_guide_d);
translate([0,-filament_guide_d/2/sqrt(2),0])
rotate([0,0,45])
cube(size=[filament_guide_d/2,filament_guide_d/2,gearbox_d],center=true);
}//rotate translate rotate translate rotate translate
// pulley
- cylinder(d=pulley_d+pulley_clearance,h=body_h+1,$fn=fnd*(pulley_d+pulley_clearance));
+ cylinder(d=pulley_d+pulley_d_clearance,h=body_h+1,$fn=fnd*(pulley_d+pulley_d_clearance));
// leverspace
hull() for(x=[0,gearbox_d])
rotate([0,0,45])
translate([x,0,ls_z-ls_h/2])
cylinder(d=idler_d+idler_clearance,h=ls_h,$fn=fnd*(idler_d+idler_clearance));
// idler clearance
a=cos(45)*(pulley_d+idler_d)/2;
b=mount_d/2-a;
x=sqrt(pow(a,2)+pow(b,2));
translate([mount_d/2,0,ls_z])
intersection() {
r = x+idler_d/2+idler_clearance;
cylinder(r=r,h=ls_h,center=true);
translate([-r-1,0,-ls_h/2-1]) cube(size=[2*r+2,r+1,ls_h+2]);
}
// back side cutout
// XXX: this is somewhat ugly and potentially bugged,
// but I want to sleep.
a0_ = atan(
(mount_d/sqrt(2)/2+mount_screw_d+pf_h(pf)+gearbox_d/2)
/
(
pulley_d/2+filament_offset-
(pf_d(pf)+2*pf_shell)/2/cos(30)
)
);
a0 = -135 + ( (a0_>0) ? a0_ : 180+a0_ );
a1 = atan((longwing-lever_thickness/2)/(gearbox_d/2));
translate([0,0,ls_z]) difference() {
rotate([0,0,-180+a0])
rotate_extrude(angle=a1-a0)
translate([0,-ls_h/2])
square([sqrt(pow(gearbox_d/2,2)+pow(longwing-lever_thickness/2,2))+1,
ls_h]);
translate([-mount_d/2,0,0])
cylinder(d=gearbox_d-mount_d,h=ls_h+2,center=true,$fn=fnd*(gearbox_d-mount_d));
}//difference translate
rotate([0,0,-45])
translate([0,0,ls_z-ls_h/2])
cube(size=[gearbox_d,gearbox_d,lever_thickness+lever_v_clearance]);
translate([0,0,ls_z-ls_h/2]) {
translate([mount_screwhead_d/2,0,0])
mirror([0,1,0])
cube(size=[gearbox_d,gearbox_d/2+1,lever_thickness+lever_v_clearance]);
}
//translate([-mount_d/2,-longwing,filament_elevation])
if(!tensioner) /* XXX: this seems to be bullshit, but it's so old, that it's historical bullshit */
translate([mount_d/2,-longwing,filament_elevation])
rotate([0,-90,0]) difference() {
cylinder(d=spring_d+spring_d_clearance,h=spring_lc+spring_dl,$fn=fnd*(spring_d+spring_d_clearance));
translate([0,0,spring_lc+spring_dl]) sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4);
}
}//difference
if(supports) intersection() {
difference() {
translate([0,0,ls_z-ls_h/2-epsilon])
cylinder(d=gearbox_d,h=ls_h+2*epsilon,$fn=fnd*gearbox_d);
- cylinder(d=pulley_d+pulley_clearance,h=body_h+1,$fn=fnd*(pulley_d+pulley_clearance));
+ cylinder(d=pulley_d+pulley_d_clearance,h=body_h+1,$fn=fnd*(pulley_d+pulley_d_clearance));
}
// supports
// TODO: hardcoded stuff below…
if(false) { // parallel
for(y=[-gearbox_d:4:gearbox_d])
translate([0,y-extrusion_width/2,0])
cube(size=[gearbox_d,extrusion_width,body_h]);
}else{ // radial
for(zr=[-65:(65+50)/7:50])
rotate([0,0,zr]) translate([0,-extrusion_width/2,0])
cube(size=[gearbox_d,extrusion_width,body_h]);
}
}
}//body module
module springpad() {
smalld=st_screw_d+st_screw_d_tolerance+2*extrusion_width;
bigd = spring_d+spring_d_clearance/2;
hf = (bigd-smalld)/2;
translate([-gearbox_d/2+st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+1,-longwing,filament_elevation])
rotate([0,90,0]) difference() {
union() {
cylinder(d1=smalld,d2=bigd,h=hf,$fn=fnd*bigd);
translate([0,0,hf-epsilon])
cylinder(d=bigd,h=hf*2,$fn=fnd*bigd);
translate([0,0,3*hf])
sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4);
}
translate([0,0,-epsilon])
cylinder(d=st_screw_d+st_screw_d_tolerance,h=2*hf+epsilon,$fn=fnd*(st_screw_d+st_screw_d_tolerance));
}
}
module knob() {
ch = knob_indent_d/2;
translate([0,0,body_h+epsilon]) {
mirror([0,0,1]) translate([0,0,-epsilon]) {
difference() {
cylinder(d=pulley_d,h=knob_bore_l,$fn=fnd*pulley_d);
translate([0,0,-1]) difference() {
cylinder(d=bore_d+knob_bore_d_tolerance,h=knob_bore_l+2);
translate([-bore_d/2-1,bore_dd-bore_d/2+knob_bore_d_tolerance/2,-1])
cube([bore_d+2,bore_d/2,knob_bore_l+4]);
}
}
}
difference() {
union() {
cylinder(d1=gearbox_d-2*ch,d2=gearbox_d,h=ch+epsilon,$fn=fnd*gearbox_d);
translate([0,0,ch])
cylinder(d=gearbox_d,h=knob_h-2*ch+epsilon,$fn=fnd*gearbox_d);
translate([0,0,knob_h-ch])
cylinder(d1=gearbox_d,d2=gearbox_d-2*ch,h=ch,$fn=fnd*gearbox_d);
}
for(a=[0:360/knob_indents:359]) rotate([0,0,a])
translate([0,gearbox_d/2,-1])
cylinder(d=knob_indent_d,h=knob_h+2,$fn=fnd*knob_indent_d);
}
}
}//knob module
module debug() {
difference() {