What are your motor drivers set? 2000 steps/rotation?
@berainlb best idea is to view the actual motor shaft… I’m also in agreement, don’t see anything wrong with the old retired carpenter math that I can see…lol
Are these NEMA types … I’m not familiar with these…
This is how I set them up on my Ruida, maybe that will help… although I think much of a variance would make a ‘large’ difference… So your procedure was probably very similar.