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-rw-r--r--another.scad8
1 files changed, 6 insertions, 2 deletions
diff --git a/another.scad b/another.scad
index 8334b11..1811584 100644
--- a/another.scad
+++ b/another.scad
@@ -1,85 +1,85 @@
draft=true;
layer_height=0.2; extrusion_width=0.4;
epsilon=0.01;
$fs=0.0125;
use <pushfittery.scad>;
include <pushfit_data.scad>;
include <pulley_data.scad>;
module the_extruder(
// motor properties
gearbox_d = 36,
mount_d = 28, // the distance between opposite mounting holes
mounthole_depth = 5,
mounthole_min_depth = 3, mounthole_max_depth = 4,
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 = pulley_e3d,
pulley_elevation = 1, // pulley elevation above the protrusion
// idler properties
idler_d = 10, 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_indent_d = 4,
knob_indents = 12,
knob_v_clearance = 1,
// spring tensioner
st_nut_d = 9, st_nut_h = 4,
- st_screw_d = 5,
+ st_screw_d = 5, st_screw_l = 16,
st_thickshell = 8*extrusion_width, st_thinshell = 2*extrusion_width,
st_split_w = 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_metal,
pf_shell = max(3*layer_height,3*extrusion_width),
// empty spaces
idler_travel = 3, // how far should idler travel when pressed
idler_clearance=.5,
pulley_small_d_clearance=.5,
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=.8,
st_nut_h_tolerance=.2,
st_nut_d_tolerance=.2,/* TODO: make it st_nut_w_tolerance */
st_screw_d_tolerance=.5,
st_split_w_tolerance = .3,
min_z_shell = 4*layer_height, // the very minimal shell thickness along z-axis.
min_xy_shell = 2*extrusion_width,
body_label = "another", body_label_thickness = layer_height,
knob_label = "another", knob_label_thickness = 2*layer_height, knob_label_size=undef,
what="lever", // lever|body|knob|springpad|*
left=false,
vitamins = true,
bridges = true,
debug = false,
) {
fnd = 2*PI; fnr = 2*fnd;
function lu(m,k) = m[search([k],m)[0]][1];
pulley_d = lu(pulley,"d");
pulley_h = lu(pulley,"h");
teeth_elevation = lu(pulley,"fe");
filament_offset = lu(pulley,"g")+filament_d/2;
pulley_d_clearance = lu(pulley,"ssrc")*2;
@@ -124,97 +124,101 @@ module the_extruder(
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/2-idler_filament_offset,0,0]) rotate([90,0,0]) {
cylinder(d=filament_d,h=gearbox_d,center=false,$fn=15);
}//rotate translate
translate([pulley_d/2+filament_offset,0,0]) rotate([-90,0,0]) {
cylinder(d=filament_d,h=gearbox_d,center=false,$fn=15);
translate([0,0,pf_offset])
pushfit(pf);
}//rotate translate
}//rotate
}//translate teeth
}//translate pulley
}//translate protrusion
- }//vitamins
+ // spring tensioner screw
+ translate([-gearbox_d/2,-longwing,ls_z])
+ rotate([0,90,0])
+ cylinder(d=st_screw_d,h=st_screw_l);
+ }//mirrorleft if(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/2-idler_filament_offset,0,0])
rotate([90,0,0]) {
mirror([0,1,0])
teardrop(d=filament_path_d,h=3*gearbox_d,center=true);
translate([0,0,
sqrt(2)*(mount_d-pulley_d+lsd)/2
]) {
cylinder(d1=filament_path_d,d2=2*filament_path_d,
h=filament_path_d,$fn=2*filament_path_d*fnd);
translate([0,0,filament_path_d-epsilon])
cylinder(d=2*filament_path_d,h=lsd*sqrt(2),$fn=2*filament_path_d*fnd);
}//translate
}//rotate translate place_idler
// idler space and mounting hole
place_idler() {
cylinder(d=idler_d+idler_clearance*2,h=idler_h+idler_v_tolerance,center=true,$fn=60);
cylinder(d=idler_screw_d,h=lever_thickness+2,center=true,$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]) {