eccentric turning

I don't think I actually have anything to hand.
But it is pretty easy to write from scratch.

Which version of LinuxCNC are you currently on?

thanks Andy, I use 2.7.3 will upgrade if needed.

If you update to 2.8 then you can use:
linuxcnc.org/docs/devel/html/motion/external-offsets.html

In fact there is already a component to do what is required:
linuxcnc.org/docs/devel/html/man/man9/eoffset_per_angle.9.html

That will give a polygon with a certain number of sides. (It doesn't do the quick retract, but will at least serve as a proof of concept)

Thanks again Andy, I'll investigate the links.

Peter.

Also, when you get V 2.8 installed to get the external offsets, there are a number of sims using the new features you can study. The one turning a hexagon is quite cool to watch even on the screen!

Where do I find the link to V2.8? I can only see 2.7.14

Peter.