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https://github.com/BelfrySCAD/BOSL2.git
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169 lines
7.5 KiB
OpenSCAD
169 lines
7.5 KiB
OpenSCAD
//////////////////////////////////////////////////////////////////////
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// LibFile: knurling.scad
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// Shapes and masks for knurling cylinders.
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// Includes:
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// include <BOSL2/std.scad>
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// include <BOSL2/knurling.scad>
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//////////////////////////////////////////////////////////////////////
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// Section: Knurling
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// Module: knurled_cylinder()
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// Usage:
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// knurled_cylinder(l, r|d, [overage], [count], [profile], [helix]);
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// knurled_cylinder(l, r1|d1, r2|d2, [overage], [count], [profile], [helix]);
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// Description:
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// Creates a mask to difference from a cylinder to give it a knurled surface.
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// Arguments:
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// l = The length of the axis of the mask. Default: 10
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// overage = Extra backing to the mask. Default: 5
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// r = The radius of the cylinder to knurl. Default: 10
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// r1 = The radius of the bottom of the conical cylinder to knurl.
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// r2 = The radius of the top of the conical cylinder to knurl.
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// d = The diameter of the cylinder to knurl.
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// d1 = The diameter of the bottom of the conical cylinder to knurl.
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// d2 = The diameter of the top of the conical cylinder to knurl.
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// count = The number of grooves to have around the surface of the cylinder. Default: 30
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// profile = The angle of the bottom of the groove, in degrees. Default 120
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// helix = The helical angle of the grooves, in degrees. Default: 30
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// chamfer = The size of the chamfers on the ends of the cylinder. Default: none.
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// chamfer1 = The size of the chamfer on the bottom end of the cylinder. Default: none.
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// chamfer2 = The size of the chamfer on the top end of the cylinder. Default: none.
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// chamfang = The angle in degrees of the chamfers on the ends of the cylinder.
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// chamfang1 = The angle in degrees of the chamfer on the bottom end of the cylinder.
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// chamfang2 = The angle in degrees of the chamfer on the top end of the cylinder.
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// from_end = If true, chamfer is measured from the end of the cylinder, instead of inset from the edge. Default: `false`.
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// rounding = The radius of the rounding on the ends of the cylinder. Default: none.
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// rounding1 = The radius of the rounding on the bottom end of the cylinder.
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// rounding2 = The radius of the rounding on the top end of the cylinder.
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// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#anchor). Default: `CENTER`
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// spin = Rotate this many degrees around the Z axis. See [spin](attachments.scad#spin). Default: `0`
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// orient = Vector to rotate top towards. See [orient](attachments.scad#orient). Default: `UP`
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// Examples(Med):
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// knurled_cylinder(l=30, r=20, count=30, profile=120, helix=45);
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// knurled_cylinder(l=30, r=20, count=30, profile=120, helix=30);
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// knurled_cylinder(l=30, r=20, count=30, profile=90, helix=30);
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// knurled_cylinder(l=30, r=20, count=20, profile=120, helix=30);
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module knurled_cylinder(
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l=20,
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r=undef, r1=undef, r2=undef,
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d=undef, d1=undef, d2=undef,
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count=30, profile=120, helix=30,
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chamfer=undef, chamfer1=undef, chamfer2=undef,
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chamfang=undef, chamfang1=undef, chamfang2=undef,
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from_end=false,
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rounding=undef, rounding1=undef, rounding2=undef,
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anchor=CENTER, spin=0, orient=UP
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) {
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r1 = get_radius(r1=r1, r=r, d1=d1, d=d, dflt=10);
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r2 = get_radius(r1=r2, r=r, d1=d2, d=d, dflt=10);
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inset = r1 * sin(180/count) / tan(profile/2);
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twist = 360*l*tan(helix)/(r1*2*PI);
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c1 = circle(r=r1,$fn=count);
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c2 = rot(-180/count,p=circle(r=r1-inset,$fn=count));
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path = [for (i=idx(c1)) each [c1[i],c2[i]]];
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knob_w = 2*PI*r1/count;
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knob_h = knob_w / tan(helix);
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layers = ceil(l/knob_h);
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plen = len(path);
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vertices = concat(
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[
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for (layer = [0:1:layers], pt=path)
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(layer%2)? [pt.x, pt.y, layer*knob_h-layers*knob_h/2] :
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rot(180/count, p=[pt.x, pt.y, layer*knob_h-layers*knob_h/2])
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], [
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[0,0,-layers*knob_h/2],
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[0,0, layers*knob_h/2]
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]
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);
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faces = concat(
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[
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for (layer = [0:1:layers-1], i=idx(path)) let(
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loff = (layer%2)? 2 : 0,
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i1 = layer*plen+((i+1)%plen),
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i2 = layer*plen+((i+2)%plen),
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i3 = (layer+1)*plen+posmod(i+1+loff,plen),
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i4 = (layer+1)*plen+posmod(i+2+loff,plen),
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i5 = (layer+1)*plen+posmod(i-0+loff,plen),
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i6 = (layer+1)*plen+posmod(i-1+loff,plen)
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) each [
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[i1, i2, ((i%2)? i5 : i3)],
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[i3, i5, ((i%2)? i2 : i1)]
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]
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], [
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for (i=[0:1:count-1]) let(
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i1 = posmod(i*2+1,plen),
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i2 = posmod(i*2+2,plen),
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i3 = posmod(i*2+3,plen),
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loff = layers*plen
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) each [
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[i1,i3,i2],
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[i1+loff,i2+loff,i3+loff],
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[i3,i1,len(vertices)-2],
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[i1+loff,i3+loff,len(vertices)-1]
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]
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]
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);
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attachable(anchor,spin,orient, r1=r1, r2=r2, l=l) {
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intersection() {
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polyhedron(points=vertices, faces=faces, convexity=2*layers);
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cyl(
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r1=r1, r2=r2, l=l,
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chamfer=chamfer, chamfer1=chamfer1, chamfer2=chamfer2,
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chamfang=chamfang, chamfang1=chamfang1, chamfang2=chamfang2,
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from_end=from_end,
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rounding=rounding, rounding1=rounding1, rounding2=rounding2,
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$fn=count*2
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);
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}
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children();
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}
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}
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// Module: knurled_cylinder_mask()
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// Usage:
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// knurled_cylinder_mask(l, r|d, [overage], [count], [profile], [helix]);
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// knurled_cylinder_mask(l, r1|d1, r2|d2, [overage], [count], [profile], [helix]);
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// Description:
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// Creates a mask to difference from a cylinder to give it a knurled surface.
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// Arguments:
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// l = The length of the axis of the mask. Default: 10
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// overage = Extra backing to the mask. Default: 5
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// r = The radius of the cylinder to knurl. Default: 10
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// r1 = The radius of the bottom of the conical cylinder to knurl.
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// r2 = The radius of the top of the conical cylinder to knurl.
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// d = The diameter of the cylinder to knurl.
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// d1 = The diameter of the bottom of the conical cylinder to knurl.
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// d2 = The diameter of the top of the conical cylinder to knurl.
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// count = The number of grooves to have around the surface of the cylinder. Default: 30
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// profile = The angle of the bottom of the groove, in degrees. Default 120
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// helix = The helical angle of the grooves, in degrees. Default: 30
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// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#anchor). Default: `CENTER`
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// spin = Rotate this many degrees around the Z axis. See [spin](attachments.scad#spin). Default: `0`
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// orient = Vector to rotate top towards. See [orient](attachments.scad#orient). Default: `UP`
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// Examples:
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// knurled_cylinder_mask(l=30, r=20, overage=5, profile=120, helix=30);
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// knurled_cylinder_mask(l=30, r=20, overage=10, profile=120, helix=30);
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module knurled_cylinder_mask(
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l=10, overage=5,
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r=undef, r1=undef, r2=undef,
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d=undef, d1=undef, d2=undef,
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count=30, profile=120, helix=30,
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anchor=CENTER, spin=0, orient=UP
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) {
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r1 = get_radius(r1=r1, r=r, d1=d1, d=d, dflt=10);
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r2 = get_radius(r1=r2, r=r, d1=d2, d=d, dflt=10);
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attachable(anchor,spin,orient, r1=r1, r2=r2, l=l) {
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difference() {
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cylinder(r1=r1+overage, r2=r2+overage, h=l, center=true);
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knurled_cylinder(r1=r1, r2=r2, l=l+0.01);
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}
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children();
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}
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}
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// vim: expandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap
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