Hello, im worknig in a custom machine to wind bass guitar pick ups. Im trying to have a stepper at 5 RPS(well its selectable from 1 to 5RPS). It has an acceleration till it gets to 5RPS. When it gets to 5 rps it takes about 3 or 4 seconds to stall(i thinks its the right word, i mean the motor stops). It does a a kind of a progresive sound till it stops. If i load the motor a bit(with my hand) it wont do it and it will keep turning, if i let go it will take 3 or 4 seconds and it will stop. Wierd thing is that its also doing it at 5, 4.5, 4, 3.5, 3, 2.5 and 2 RPS. Its stable at 1.5 and 1 RPS.
I think it could be resonance problem. But im not sure.
Anyone has ever runned accross something similar??
The driver im using is a l297 l298 with a nema 23 motor.
Thanks, Matias.