Digital drivers from Zap

[Jonathan]

Nema 34 will have slower acceleration since it's rotor is bigger, causing the moment of inertia to be greater, but clearly the high voltage driver compensates.

Having different drivers on each axis is fine and a good idea to cut cost, potentially.

I think you'd be fine with Nema 23 (3 or 4nm) motors on X and Y. It's a similar size to my machine which runs well with 3nm and PM752.

If not already you should consider driving the ballscrews via pulleys/timing belts to get the most out of the motors.