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Added knurling.scad
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Revar Desmera
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2 changed files with 114 additions and 1 deletions
113
knurling.scad
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113
knurling.scad
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//////////////////////////////////////////////////////////////////////
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// LibFile: knurling.scad
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// Shapes and masks for knurling cylinders.
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// To use, add the following lines to the beginning of your file:
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// ```
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// include <BOSL2/std.scad>
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// include <BOSL2/knurling.scad>
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// ```
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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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// 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(l=30, r=20, profile=120, helix=45);
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// knurled_cylinder(l=30, r=20, profile=120, helix=30);
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// knurled_cylinder(l=30, r=20, profile=90, 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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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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orient_and_anchor([2*r1,2*r1,l], size2=[2*r2,2*r2], anchor=anchor, spin=spin, orient=orient, geometry="cylinder", chain=true) {
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intersection() {
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linear_extrude(height=l, center=true, convexity=10, twist=twist, scale=r2/r1, slices=l/knob_h*2) {
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polygon(path);
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}
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linear_extrude(height=l, center=true, convexity=10, twist=-twist, scale=r2/r1, slices=l/knob_h*2) {
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polygon(path);
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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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orient_and_anchor([2*r1,2*r1,l], size2=[2*r2,2*r2], anchor=anchor, spin=spin, orient=orient, geometry="cylinder", chain=true) {
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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: noexpandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap
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@ -14,7 +14,7 @@ done
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if [[ "$FILES" != "" ]]; then
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PREVIEW_LIBS="$FILES"
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else
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PREVIEW_LIBS="common errors attachments math arrays vectors affine coords geometry triangulation quaternions strings structs hull constants edges transforms primitives shapes masks shapes2d paths beziers roundcorners walls cubetruss metric_screws threading partitions involute_gears sliders joiners linear_bearings nema_steppers wiring phillips_drive torx_drive polyhedra cubetruss debug"
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PREVIEW_LIBS="common errors attachments math arrays vectors affine coords geometry triangulation quaternions strings structs hull constants edges transforms primitives shapes masks shapes2d paths beziers roundcorners walls cubetruss metric_screws threading partitions involute_gears sliders joiners linear_bearings nema_steppers wiring phillips_drive torx_drive polyhedra knurling cubetruss debug"
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fi
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dir="$(basename $PWD)"
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