Hello, I've got a 42V 720W switched mode power supply running 4x AM882H stepper drivers with 4 x 60BYGH301B stepper motors (3.1nm/4.2A/0.65Ohm/parallel wired), running a 4x4 plasma table (dual motors to one axis) on a HTD belt drive acting as a rack & pinion arrangement.

It's been running fine, but not happy about the switched mode power supply really, and it was only really a temporary fix, hence I was looking at using a torodial transformer, given these are AM88H drives, they accept accept AC or DC as they have their own rectifiers and capacitors internal.

question, what voltage and VA rating would you go with...

I was considering 2x50V / 1000VA, but the choices are really 2x45V, 2x50V, 2x55V, 1000VA, 1250VA 1500VA, 2000VA.

from somewhere like here: / maplin do up to 1000VA.

Yup, I've read all the gecko drive power supply selection info, and I know all about ac > dc x sqrt 2, etc etc.

I am hoping to use the same drive box in different applications in my garage as I'm not intending to build another, hence for a lathe and milling machine if I ever get around to converting any of those.

The BOB PSU is separate

thanks for your time and any guidance.