so I've been running these closed loop steppers on my mill for a while (using the NEMA 34 version) and never had a problem. I've building a lathe right now, using the smaller nema 23 steppers as they are about perfect for the size lathe I have. So here's the issue. The steppers work perfect until I put load on them, and them I get a following error from the control. I wasn't given any software to chance the control settings, but i didn't have to for the ones on my mill either.

So I guess my question to you guys who know more about steppers than I do, is there something I could have wired up incorrectly to get significantly lower toque from the motors? I power supply is giving the controls 48VDC, and is seems like they should be working.

I suppose the other issue could be the feedback loop. if it's trying to hold to tight a error it would fault out any time it's moved....