The Dreaded X axis stepper error using UC400ETH and UCCNC !!!

[Ger21]

If I'd figured that out before, I'd have got the 570oz nema23 on 60v for the AMAT25 rather than the nema34 on 60v I have.

It's not that simple.
A 450oz Nema 34 rated at 6 amps will usually easily outperform a 570oz Nema 23 rated at 5 amps.
Inductance plays a large role. And typically, smaller nema 34 low inductance motors can spin much faster than large Nema 23 motors.

[m_c]

It's not that simple.
A 450oz Nema 34 rated at 6 amps will usually easily outperform a 570oz Nema 23 rated at 5 amps.
Inductance plays a large role. And typically, smaller nema 34 low inductance motors can spin much faster than large Nema 23 motors.

Ger, I think you got your motor sizes mixed up there...