On Wed, 3 Jan 2024 at 23:52, andy pugh <bodge...@gmail.com> wrote: > x'= Dm/2×cosØ −2×e×cos(2Ø)+e×cos(4Ø) > y'= Dm/2×sinØ +2×e×sin(2Ø)+e×sin(4Ø) > > Plotted out this is very close to the shape that I had but differs by > about 30 microns at the worst spots. > > The good news is that this is very easy to convert to either XY > offsets for boring, or a radius for computed offset on a lathe as it > is already in terms of spindle angle Ø.
I was wrong here. The Xi angle is a generator only, it gives you x,y points but the angle is _not_ the centre angle, so it can't be used directly as the spindle angle. I explain this all in my recent YouTube video, with an animation of how the generator works. https://youtu.be/YDxyNChCILU?si=1kMJ5d7FZ9qKFlAl -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1912 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
