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Fixed Chamfer for clean print

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Used chamfer and shift to make sure gears print clean without supports.
Print angle is now 92 degrees; much closer and the gear block fuses the gears in the back.
This commit is contained in:
Stephen Carpenter
2021-01-14 00:38:35 -05:00
parent 33e3666c19
commit 93e7675ab5
1 changed files with 35 additions and 14 deletions
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45
GearHinge.scad
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@@ -8,7 +8,7 @@ use <PolyGear/PolyGear.scad>
include <PolyGear/PolyGearBasics.scad>
use <PolyGear/shortcuts.scad>
chamfer=40;
chamfer=30;
axis_angle=0;
//helix_angle = [ for (x=linspace(-1,1,11)) exp(-abs(x))*10*sign(x) ];
helix_turns = 3;
@@ -50,14 +50,19 @@ $fa = ($preview) ? 17 : .1;
$fs = ($preview) ? 3 : .1;
$incolor = true;
plate_hinge();
plate_print();
//plate_full_open();
//gear_hinge(rot=rot, box=false, rounded_case=true);
//translate([50,0,0]) gear_hinge(rot=rot, box=false, box_top=true);
module plate_hinge() {
rot = 90 - 5;
module plate_full_open(rot=90) {
rot = 90;
gear_hinge(rot=rot, box=false, rounded_case=true);
}
module plate_print(rot=90-8, door=false) {
gear_hinge(rot=rot, box=false, rounded_case=true, door=door);
}
module gear_hinge(
@@ -67,6 +72,7 @@ module gear_hinge(
box_color="green",
left_gear_color="blue",
right_gear_color="red",
door = false,
rot=0) {
//offex=tol;
bc = $incolor ? box_color : undef;
@@ -75,7 +81,7 @@ module gear_hinge(
offex=0;
color(lgc) translate([-MeshD/2 - offex,0]) rotate([0,0,rot]) blue_gear();
color (rgc) translate([offex + MeshD/2,0]) rotate([0,0,-rot]) red_gear();
color (rgc) translate([offex + MeshD/2,0]) rotate([0,0,-rot]) red_gear(door=door);
if (box) {
color(bc) box(full = true, top=box_top, tol=tol);
} else if (rounded_case) {
@@ -89,8 +95,8 @@ module gear_hinge(
module gear_track_block() {
difference() {
CyS(r=MeshD/2 +.5, h=width, w1=275, w2=310);
CyS(r=ShaftD+.5, h=width, w1=275, w2=310);
CyS(r=MeshD/2 +.5, h=width/2, w1=275, w2=310);
CyS(r=ShaftD+.5, h=width/2, w1=275, w2=310);
}
}
@@ -106,7 +112,7 @@ module gear_sector(meshd, width) {
// blue_gear - Gear on the left with the track block built into its back side.
module blue_gear() {
intersection() {
spur_gear(n=N1, w=width, m=Module, chamfer=30, helix_angle = helix_angle, add=-tol/4 );
spur_gear(n=N1, w=width, m=Module, chamfer=chamfer, chamfer_shift=-2,helix_angle = helix_angle, add=-tol/4 );
difference() {
gear_sector(meshd=MeshD, width=width);
@@ -129,21 +135,36 @@ module blue_gear() {
}
// Red Gear - Gear on the right.
module red_gear()
module red_gear(door=false)
{
difference() {
union() {
CyS(r=MeshD/2 - 2, h=width, w1=90, w2=190);
intersection() {
spur_gear(n=N2, w=width, m=Module, chamfer=30, helix_angle=-helix_angle, add=-tol/4);
spur_gear(n=N2, w=width, m=Module, chamfer=chamfer, chamfer_shift=-2, helix_angle=-helix_angle, add=-tol/4);
CyS(r=MeshD, h=width, w1=181, w2=-30);
}
// leaf arm
translate([-2,11.6,0]) leaf_arm(left=false, h=width+3.2)
translate([0,-4+tol,0]) cube([4,10,width+3.2], center=true);
translate([-2,11.6]) {
if (door) leaf_arm(left=false, h=width+3.2)
translate([0,-4+tol]) {
translate([0,-1.6]) cube([4,5+2,width+3.2], center=true);
difference() {
translate([7,7]) cube([18,14,width+3.2], center=true);
translate([10,7]) cube([14,6.5,width+4], center=true);
translate([10,15]) rotate([90,0,0]) {
cylinder(d=2.1, h=10);
translate([0,0,5]) cylinder(d=2.8, h=12);
translate([0,0,12]) cylinder(d=4, h=5);
}
}
}
else leaf_arm(left=false, h=width+3.2);
}
// Rear Block
gear_track_block();
}