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-rw-r--r--another.scad21
1 files changed, 12 insertions, 9 deletions
diff --git a/another.scad b/another.scad
index 297c1fc..ed18874 100644
--- a/another.scad
+++ b/another.scad
@@ -8,64 +8,65 @@ include <pushfit_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_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 = 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_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_d_clearance=2,
pulley_small_d_clearance=0.5,
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=.6,
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,
what="lever", // lever|body|knob|springpad|*
@@ -208,65 +209,65 @@ module the_extruder(
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);
// spring tensioner part
translate([-gearbox_d/2,0,0]) hull() {
translate([0,-longwing,ls_z])
rotate([0,90,0])
cylinder(d=lever_thickness,h=fsw,$fn=fnd*lever_thickness);
hh=body_h-ls_z;
translate([0,0,ls_z])
- mirror([0,1,0]) cube(size=[fsw,longwing+(st_thinshell+st_split_w_tolerance)/2+st_thickshell,body_h-ls_z]);
+ mirror([0,1,0]) cube(size=[fsw,longwing+(st_split_w+st_split_w_tolerance)/2+st_thickshell,body_h-ls_z]);
hhh=ls_z;
translate([0,0,0])
mirror([0,1,0]) cube(size=[fsw,longwing-hhh+lever_thickness/sqrt(2),hhh+lever_thickness/2]);
}//hull translate
// pushfit bracket
translate([0,0,filament_elevation])
rotate([0,0,45]) translate([pulley_d/2+filament_offset,0,0])
rotate([-90,0,0])
translate([0,0,mount_d/sqrt(2)/2+mount_screw_d-gearbox_d/2/*TODO:*/]) {
pfbl = pf_h(pf)+gearbox_d/2; //TODO:
if(pf_smooth) {
pfbd = pf_d(pf)+2*pf_shell;
hull() {
cylinder(d=pfbd,h=pfbl,$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,$fn=6);
translate([-pfbs/2,0,0]) {
hull() {
translate([0,-pfba,0]) cube(size=[pfbs,pfb2a,pfbl]);
cube(size=[pfbs,filament_elevation,pfbl-filament_elevation+pfba]);
mirror([0,1,0])
cube(size=[pfbs,body_h-filament_elevation,pfbl-body_h+filament_elevation+pfba]);
@@ -332,105 +333,107 @@ module the_extruder(
(mount_d/sqrt(2)/2+mount_screw_d+pf_h(pf)+gearbox_d/2)
/
(
pulley_d/2+filament_offset-
(pf_d(pf)+2*pf_shell)/2/cos(30)
)
);
a0 = -135 + ( (a0_>0) ? a0_ : 180+a0_ );
a1 = atan((longwing-lever_thickness/2)/(gearbox_d/2));
translate([0,0,ls_z]) difference() {
rotate([0,0,-180+a0])
rotate_extrude(angle=a1-a0)
translate([0,-ls_h/2])
square([sqrt(pow(gearbox_d/2,2)+pow(longwing-lever_thickness/2,2))+1,
ls_h]);
translate([-mount_d/2,0,0])
cylinder(d=gearbox_d-mount_d,h=ls_h+2,center=true,$fn=fnd*(gearbox_d-mount_d));
}//difference translate
// spring tensioner
translate([-gearbox_d/2,-longwing,ls_z]) rotate([0,-90,0]) {
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, $fn=fnd*bigd);
- translate([0,-(st_thinshell+st_split_w_tolerance)/2,0])
- cube(size=[body_h-ls_z+1,st_thinshell+st_split_w_tolerance,fsw+1]);
+ translate([0,-(st_split_w+st_split_w_tolerance)/2,0])
+ cube(size=[body_h-ls_z+1,st_split_w+st_split_w_tolerance,fsw+1]);
}//translate
translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+hf-epsilon])
cylinder(d=bigd,h=fsw+1,$fn=fnd*bigd);
}//mirror
}//translate
// label
label_thickness = 2*layer_height;
label_len = len(label);
- labelspace = [gearbox_d/2-mount_screwhead_d/2-min_xy_shell,longwing-(mount_screwhead_d-st_thinshell-st_split_w_tolerance)/2-2*min_xy_shell-mount_d/2];
+ if(label_len) {
+ labelspace = [gearbox_d/2-mount_screwhead_d/2-min_xy_shell,longwing-(mount_screwhead_d-st_split_w-st_split_w_tolerance)/2-2*min_xy_shell];
translate([0,0,body_h-label_thickness])
linear_extrude(height=label_thickness+epsilon,convexity=64)
- translate([-mount_screwhead_d/2-min_xy_shell-labelspace.x/2,-longwing+(st_thinshell+st_split_w_tolerance)/2+min_xy_shell+labelspace.y/2])
+ translate([-mount_screwhead_d/2-min_xy_shell-labelspace.x/2,-longwing+(st_split_w+st_split_w_tolerance)/2+min_xy_shell+labelspace.y/2])
mirror([left?0:1,0])
text(text=label,size=labelspace.x/label_len,halign="center",valign="center",font="Arial Black");
+ }//if(label_len)
}//difference
}//body module
module springpad() {
smalld=st_screw_d+st_screw_d_tolerance+min_xy_shell;
bigd = spring_d+spring_d_clearance/2;
hf = (bigd-smalld)/2;
h = hf*3.5;
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,$fn=fnd*bigd);
translate([0,0,hf-epsilon])
cylinder(d=bigd,h=h-hf,$fn=fnd*bigd);
translate([0,0,h])
sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4);
l = body_h-ls_z;
- w = st_thinshell;
- hull() translate([0,-st_thinshell/2,0]) mirror([1,0,0]) {
+ w = st_split_w;
+ hull() translate([0,-st_split_w/2,0]) mirror([1,0,0]) {
translate([0,0,w])
- cube(size=[l,st_thinshell,w]);
- cube(size=[l-w,st_thinshell,2*w]);
+ cube(size=[l,st_split_w,w]);
+ cube(size=[l-w,st_split_w,2*w]);
}
}
translate([0,0,-epsilon])
cylinder(d=st_screw_d+st_screw_d_tolerance,h=2*hf+epsilon,$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);
}