Quote Originally Posted by Agathon View Post
Just realised that it was your Youtube video of a Leadshine closed loop stepper that turned me on to the idea.

Maybe, as you've said in other threads, I'd be better off with conventional Nema34 steppers and digital drivers. Just like the idea of the smooth closed loop, but there's no point if the two phase motors aren't any smoother.

Thanks again for your help.
Yes that's me.!!

Standard 34's with Am882 will be perfect for Mill. When correctly setup there will be no difference between 2 phase Closed loop in performance terms.
If the machines loses position the closed loop will bring it back into line yes.!! . . But the damage will still have been done if it was machining at time. Again Correctly sized and setup stepper shouldn't lose position so it's not problem. I've built loads of routers using the AM882 and Em806 drives along with 34 and 23 steppers which travel high feeds where torque is lower and they don't lose position so on slower moving mill you won't have any trouble.