Quote Originally Posted by dazp1976 View Post
Even with motors of near the same inductance is proven.
Nema34, 1080oz (7nm and change) 3.5mh inductance:
Loud, bad resonance, max velocity 2000mm/min, stalls thereafter, Inertia causes 0.2mm overshoots at stop.

Nema24, 566oz (4nm) 3mh inductance:
Near silent, max velocity can exceed 3000mm/min, stops dead, accels like a rocket.
And here I thought it was all down to inductance.

Quote Originally Posted by dazp1976 View Post
Still have a 1080oz on Z, (2000 is quick enough there). Might need it for my spindles new servo motor (7kg weight)
Upping the power to 72V, might change driver to a stepperonline 100vdc input one (psu can go to 80).
Which drivers are you considering?
I have the CL86Y or CLA86T from stepperonline on my list of options for this project.
I could run them directly off 60VAC