I'd be looking at using AC servos. I see MESA have a board already configured to output to servo drives which also has encoder feedback as well.

I have a number of old PC's here, so might have to se if I can run the latency test on them and see what I get!

Seems like LCNC is at a bit of a disadvantage here compared to windows based programs like MACH3 etc.

And a bit of a catch22 with what to buy. Not the best situation having to buy something, then test it.

I see Tormach are now using an LCNC based controller, and the Centroid software is Linux based as well. How do these companies get on with what computer to use, or is there software setup different to LCNC?