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Good morning Experts,
We have started a new installation integrating 18 ATV930 drives. The drives all drive tyres, sometimes with 2 motors in parallel behind 1 drive. These are solutions we apply very often with positive results.
However, in this installation, the motors start vibrating and make a strange noise from +/- 40Hz. This for both dual and single motors. Tried everything as factory setting, tuning again.... Only adjusting the SLP (0%) and UFR (0%) seems to do the trick. Also the current then goes down.
What could be at the root of this phenomenon?
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