Quote Originally Posted by drumsticksplinter View Post
To Paulus, That indeed is very interesting and also worrying for my 12Nm motors. I was looking at the 150v drives to start with, but I got a guy in china to spec the drives and power supplies to my motors, like he did on a plasma table I recently built and he recommended a 68v 400w system. He also sold the 150v drives btw... However, I do think myself these would work best and would save having to buy power supplies for every drive.
You need to find your motor specs in order to choose the right drive. My 150V was only a guess! If you have the 68V 8A drives is better to get better steppers for them, up to 5.7 amps per phase and the inductance lower than 4.4mH. Probably will be at half the length of the 12Nm therefore near to half the holding torque and inertia.

I was searching the last two days for Nema34 stepper for my machine and found some weird things. I will post tomorrow on my build log.