Hi Brian
I have been through that process! and no further forward
Chose pwm control which works fine in M3
I also used the same pin, step , direction settings which I had used in M3 but in M4
However the setup pages are far more involved .. lack of a manual is a serious defect IMHO.
I am trying to progress by trial and error . hardly an effective way forward.
I can run a program in M3 Cant (yet) in M4 . I suppose it may be easier for those with stepper spindles where effectively it is little more than another axis .
Where are the lathe users out there using other spindle speed controls , Vfd, Lenze etc