What size stepper motor do I-need.

[Clive S]

Ball Screws, direct drive, .5"/rev, 48"X48" table, 2.2 KW water cooled spindle with 10" of travel. The machine is totally in pieces but I will post pictures as it goes back together. I'm replacing the rails and bearings so most of the machine is in tote boxes or stacked in a corner.

Ok then I take it you have read this earlier in this post from Jazzcnc

I'll save you a lot of headache and just say use 3Nm motors run at 65-70Vdc on 75-80vdc drives and you won't have any problems cutting anything.

Cutting speeds will depend on many factors like spindle power and tool material but 4500-5000mm/min wouldn't be out the way with 2.2Kw spindle using carbide tooling.

It might be better to keep away from direct drive and use belts and pulleys with a 2:1 reduction (that's what we tend to do this side of the pond) ..Clive