AB Kinetix 'vibration'

[mike J]

I have an AB kinetix 6000 system that every so often starts 'vibrating'. It takes out the entire rack. I think I have it narrowed down to a partictular motor/drive, but after changing every component, (drive, motor, FB cable, backplane, filter), the problem re-occurs. Usually, a power cycle clears the problem, but not always.

Tuning the suspect motor/drive combo doesn't permanently fix the issue either, as it re-occurs. Does anyone have suggestions?

 

[MichaelG]

look into the tuning more -
There is a setting for backing off the gain when stationary and in position (backlash)

Also Auto tune with the 0.8 setting set to 1.0

 

[baldone]

The kinetix auto tuning sucks.....period.

Most of the better servos(Yaskawa is my favorite) have auto tuning with anti-resonance features including automatic band filtering.

 

[Mill_Control]

We had a recurring issue with a Kinetix 6000 rack acting squirrely, which appeared to be just one motor, that turned out to be firmware. v1.124 IIRC. When I checked for firmware upgrades the version we were running wasn't available.................

We upgraded to 1.131 and it's been rock solid for about a month now.

 

[Ken Roach]

Is the vibration a mechanical resonance in the servomotor ? What sort of load is this axis driving ?

Does the problem occur when the axis is holding position, or when it's in motion ?

Exactly what do you mean by "takes out the whole rack" ? Does a fault occur ? Is something damaged ?

What type of motor are you using ? What type of feedback ?

Are you getting any sort of feedback warnings ?

What firmware are you running ?

 

[CapinWinky]

You may also want to check the mains to be sure it is a configuration that is compatible with the drive. Ungrounded center taps on a wye (Y) isolation transformer can cause odd behavior and ultimately drive failure.

Shorted or low voltage rating motor cables can also cause weird vibrations, cogging, and direction changes.