Quote Originally Posted by m_c View Post
Bigger isn't always better.

To get the best out of those Nema 34 motors, you'd need a 150V power supply.
There are very few applications where Nema 34 are better suited than Nema 23/4, as unless you need the maximum amount of torque with limited speed, good Nema 23/4 motors will perform far better.

Yes, bigger one is not always better.