Excessive stepper motor vibration

[powerfade]

Hi... I have a Vexta 5 phase udx5128 drive hooked up to a newer upk569auha 5 phase stepper motor. For some reason I am getting excessive vibration when running/jogging the motor. The motors moves in the proper directions and seems to have sufficient holding torque, but it is just loud. I am beginning to think the drive is bad. I wouldn't think it's a mechanical issue, because nothing is hooked up to the motor. The motor wire colors from the older drive to the newer motor do not match, but I found another post here that I am trusting to be the correct wiring order. Does anyone have any idea what may be causing this??

Thanks..

[H500]

Step it at 1 step per second. It should move forward in equal steps. If it misses steps or goes backwards on some steps, then the drive is either bad or you hooked it up wrong. Otherwise, it's resonance and you will need to build a damper.

[wildwestpat]

With any stepper motor there is a natural tendency to stall and buzz angrily if it is not connected to a load. I note that you are testing with the motor not connected so simply connect up to the machine and then see how it performs. It is very probably OK. The Vexta drives are good at coping with the resonance issues so you should not need any dampers or rattlers after adjusting the acceleration and speed settings in the drive electronics that converts code to step and direction pulses for the Vexta drive / amplifier.

Regards - Pat

[powerfade]

Thanks for the suggestions guys. I will try both tomorrow and let you know my results. Hopefully it is something minor..