[peteeng]

Hi Ernie- Have you dialled the accel back? If the acceleration is set too high your motors cannot reach the velocity at that acceleration. ie it can't provide the torque at that accel and velocity so it stalls. So choose a very low accel and see what happens. Cheers Peter

[ErnieH]

JoeAverage
I did find a NEMA 34 which should bolt up to the machine as is with 5.5mh of inductance. I still need to look at the rest of the spec's but in my little mind 5.5 is half of 11, so I should get the speed I would like to have without breaking the bank. The post you noted is talking about servo's instead of steppers, but I just don't want to dump that much money into it right now. Thoughts?

Peteeng
I have the accel set to 1 right now. It will go a few or several inches and then stall. As soon as the RPM's come down, it moves again. Of course it loses position when it does it.