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authorMichael Krelin <hacker@klever.net>2018-08-02 10:35:31 (UTC)
committer Michael Krelin <hacker@klever.net>2018-08-02 10:35:31 (UTC)
commitdf23f0042d72bfcc7ba1638a2209545cbfe89825 (patch) (side-by-side diff)
tree032488f7b983f5c7dfbd113a4a084d62a77695d0
parenta04582d4c163c58bd779e02e3de624ccd1f643f4 (diff)
downloadextrudery-df23f0042d72bfcc7ba1638a2209545cbfe89825.zip
extrudery-df23f0042d72bfcc7ba1638a2209545cbfe89825.tar.gz
extrudery-df23f0042d72bfcc7ba1638a2209545cbfe89825.tar.bz2
another: work being done on spring tensioner
Diffstat (more/less context) (ignore whitespace changes)
-rw-r--r--another.scad57
1 files changed, 50 insertions, 7 deletions
diff --git a/another.scad b/another.scad
index 2be24e4..844dc3b 100644
--- a/another.scad
+++ b/another.scad
@@ -22,47 +22,53 @@ module the_extruder(
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_shell = 4*extrusion_width,
// screw it
mount_screw_d = 3.1, mount_screw_l = 20,
mount_screwhead_d=6, mount_screwhead_h=3,
pf = pushfit_embeddest,
// empty spaces
idler_travel = 3, // how far should idler travel when pressed
idler_clearance=1,
pulley_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,
- what="lever",
+ what="lever", // lever|body|knob|springpad|*
left=false,
vitamins = true,
- supports = false
+ supports = false,
+ tensioner = true,
+ debug = false
) {
lever_shell = mount_screwhead_h+0.5;
lever_thickness=max(spring_d+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);
@@ -188,26 +194,43 @@ module the_extruder(
hull() {
translate([0,-longwing,ls_z])
rotate([0,90,0])
cylinder(d=max(lever_thickness,spring_d+spring_d_clearance+2*extrusion_width),h=fsw,$fn=2*PI*lever_thickness);
hh=body_h-ls_z;
translate([0,0,ls_z-lever_thickness/2])
mirror([0,1,0]) cube(size=[fsw,longwing-hh+lever_thickness/sqrt(2),hh+lever_thickness/2]);
hhh=ls_z;
translate([0,0,0])
mirror([0,1,0]) cube(size=[fsw,longwing-hhh+lever_thickness/sqrt(2),hhh+lever_thickness/2]);
}
}
- translate([0,-longwing,ls_z]) rotate([0,-90,0])
- finger_indent(d=lever_thickness-1,r=15);
+ translate([0,-longwing,ls_z]) rotate([0,-90,0]) {
+ if(!tensioner) finger_indent(d=lever_thickness-1,r=15); else {
+ if(debug) translate([0,-gearbox_d,-gearbox_d]) cube(size=[body_h/2+1,gearbox_d,gearbox_d+2]);
+ mirror([0,0,1]) {
+ translate([0,0,st_shell])
+ hull() for(o=[0,spring_d]) translate([0,-o,0])
+ rotate([0,0,30])
+ cylinder(d=st_nut_d,h=st_nut_h,$fn=6);
+ translate([0,0,-1]) cylinder(d=st_screw_d,h=fsw+2,$fn=st_screw_d*PI*2);
+ bigd = spring_d+spring_d_clearance;
+ hf = (bigd-st_screw_d)/2;
+ translate([0,0,st_shell+st_nut_h+st_shell-epsilon])
+ cylinder(d1=st_screw_d,d2=bigd,
+ h=hf+epsilon, $fn=bigd*PI*2 );
+ translate([0,0,st_shell+st_nut_h+st_shell+hf-epsilon])
+ cylinder(d=bigd,h=fsw+1,$fn=bigd*PI*2);
+ }
+ }
+ }
} // 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=2*PI*protrusion_d);
@@ -251,25 +274,25 @@ module the_extruder(
translate([-r-1,0,-1]) cube(size=[2*r+2,r+1,ls_h+2]);
}
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])
- translate([mount_d/2,-longwing,filament_elevation])
+ if(!tensioner) translate([mount_d/2,-longwing,filament_elevation])
rotate([0,-90,0]) difference() {
cylinder(d=spring_d+spring_d_clearance,h=spring_lc+spring_dl,$fn=PI*spring_d);
translate([0,0,spring_lc+spring_dl]) sphere(d=spring_d*3/4,$fn=PI*spring_d);
}
//sphere(d=spring_d*3/4,$fn=PI*spring_d);
*difference() {
// spring support
translate([0,-longwing,filament_elevation])
sphere(d=spring_d*3/4,$fn=PI*spring_d);
}
}//difference
@@ -286,24 +309,39 @@ module the_extruder(
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+extrusion_width;
+ bigd = spring_d+spring_d_clearance/2;
+ hf = (bigd-smalld)/2;
+ translate([-gearbox_d/2+st_shell+st_nut_h+st_shell+smalld,-longwing,filament_elevation])
+ rotate([0,90,0]) difference() {
+ union() {
+ cylinder(d1=smalld,d2=bigd,h=hf,$fn=bigd*PI*2);
+ translate([0,0,hf-epsilon])
+ cylinder(d=bigd,h=hf*2,$fn=bigd*PI*2);
+ }
+ cylinder(d=st_screw_d,h=2*hf,$fn=st_screw_d*PI*2);
+ }
+ }
+
module knob() {
ch = knob_indent_d/2;
translate([0,0,body_h+epsilon]) {
mirror([0,0,1]) translate([0,0,-epsilon]) {
difference() {
cylinder(d=pulley_d,h=knob_bore_l,$fn=pulley_d*PI*2);
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]);
}
}
@@ -313,25 +351,30 @@ module the_extruder(
cylinder(d1=gearbox_d-2*ch,d2=gearbox_d,h=ch+epsilon,$fn=PI*gearbox_d*2);
translate([0,0,ch])
cylinder(d=gearbox_d,h=knob_h-2*ch+epsilon,$fn=PI*gearbox_d*2);
translate([0,0,knob_h-ch])
cylinder(d1=gearbox_d,d2=gearbox_d-2*ch,h=ch,$fn=PI*gearbox_d*2);
}
for(a=[0:360/knob_indents:359]) rotate([0,0,a])
translate([0,gearbox_d/2,-1])
cylinder(d=knob_indent_d,h=knob_h+2,$fn=knob_indent_d*PI*2);
}
}
}//knob module
-
+
mirrorleft()
if(what=="lever") color("green",0.7) lever();
else if(what=="body") color("yellow",0.7) body();
else if(what=="knob") color("red",0.7) knob();
- else if(what=="both" || what=="*") {
+ else if(what=="springpad") color("blue",0.7) springpad();
+ else if(what=="both") {
+ color("green",0.7) lever();
+ color("yellow",0.7) body();
+ }else{
color("green",0.7) lever();
color("yellow",0.7) body();
color("red",0.7) knob();
+ color("blue",0.7) springpad();
}
}
the_extruder(what="both",left=false);