For info, I moved Thor (CS Labs IP-A) onto Mach 4 yesterday to try it out. I had pretty much got Mach 3 working OK but was never happy with its stability and the tuning always seemed a bit off.

Took a few hours to work out how to set it up. Having got SIMCNC working helped a bit as they use some similar 'terminology' in their plugin.

The machine is not tuned property but its working. Some issues with spindle control but I suspect that is related to the VFD, not Mach 4.

My thoughts are 'that's nice, screens look OK etc' but I struggle to see the benefit of the extra work for Servo control where postition control via step / direction just works. Sure, you dont have any live encoder / DRO / closed loop control or knowing if you missed a step but if the machine is setup well, do you really need it?

So yes, moving to Position Control for simplicity must be high on the agenda.