Hi, I have a CNC'ed X1 (CNCFusion kit ) with the standard ACME screws. I was making some tooling at the weekend and all of my circular pockets are distinctly deformed at the point the X-axis changes direction. Right to left seems worse than left to right - could this be down to an interaction with the direction of tool rotation?

Anyway, is there anything I can do about it? I am running Mach 3 - it has software backlash correction, but that seems like a last-resort from the manual. I'd also need to know what the backlash actually is - any ideas how I measure it?

I believe the X1's ACME nuts are adjustable, is it possible to adjust it without removing the table by cranking the table all the way over to the right and then using a long screwdriver to adjust the set-screws?

Cheers.