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Fixed convexity for involute_gears.scad. Added worm gear meshing examples.

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Garth Minette 2021-02-26 17:26:44 -08:00
parent ac66433207
commit d201e344c4
1 changed files with 24 additions and 4 deletions
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28
involute_gears.scad
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@ -696,7 +696,7 @@ module gear(
twist = atan2(thickness*tan(helical),p);
attachable(anchor,spin,orient, r=p, l=thickness) {
difference() {
linear_extrude(height=thickness, center=true, convexity=10, twist=twist) {
linear_extrude(height=thickness, center=true, convexity=teeth/2, twist=twist) {
gear2d(
pitch = pitch,
teeth = teeth,
@ -927,7 +927,7 @@ module bevel_gear(
];
attachable(anchor,spin,orient, r1=pr, r2=ipr, h=thickness, anchors=anchors) {
difference() {
vnf_polyhedron(vnf, convexity=teeth);
vnf_polyhedron(vnf, convexity=teeth/2);
if (shaft_diam > 0) {
cylinder(h=2*thickness+1, r=shaft_diam/2, center=true, $fn=max(12,segs(shaft_diam/2)));
}
@ -1172,7 +1172,7 @@ module worm(
mod=mod
);
attachable(anchor,spin,orient, d=d, l=l) {
vnf_polyhedron(vnf);
vnf_polyhedron(vnf, convexity=ceil(l/pitch)*2);
children();
}
}
@ -1209,6 +1209,26 @@ module worm(
// worm_gear(pitch=5, teeth=36, worm_diam=30, worm_starts=4);
// Example: Metric Worm Gear
// worm_gear(mod=2, teeth=32, worm_diam=30, worm_starts=1);
// Example(Anim,Frames=4,FrameMS=125,VPD=225,VPT=[-15,0,0]): Meshing Worm and Gear
// $fn=36;
// pitch = 5; starts = 4;
// worm_diam = 30; worm_length = 50;
// gear_teeth=36;
// right(worm_diam/2)
// yrot($t*360/starts)
// worm(d=worm_diam, l=worm_length, pitch=pitch, starts=starts, orient=BACK);
// left(pitch_radius(pitch=pitch, teeth=gear_teeth))
// zrot(-$t*360/gear_teeth)
// worm_gear(pitch=pitch, teeth=gear_teeth, worm_diam=worm_diam, worm_starts=starts);
// Example: Meshing Worm and Gear Metricly
// $fn = 72;
// modulus = 2; starts = 3;
// worm_diam = 30; worm_length = 50;
// gear_teeth=36;
// right(worm_diam/2)
// worm(d=worm_diam, l=worm_length, mod=modulus, starts=starts, orient=BACK);
// left(pitch_radius(mod=modulus, teeth=gear_teeth))
// worm_gear(mod=modulus, teeth=gear_teeth, worm_diam=worm_diam, worm_starts=starts);
// Example: Called as Function
// vnf = worm_gear(pitch=8, teeth=30, worm_diam=30, worm_starts=1);
// vnf_polyhedron(vnf);
@ -1330,7 +1350,7 @@ module worm_gear(
thickness = pointlist_bounds(vnf[0])[1].z;
attachable(anchor,spin,orient, r=p, l=thickness) {
difference() {
vnf_polyhedron(vnf);
vnf_polyhedron(vnf, convexity=teeth/2);
if (shaft_diam > 0) {
cylinder(d=shaft_diam, l=worm_diam, center=true);
}