Thanks Jazz,

That means we are one step closer to resolving this issue.
From the uploaded pictures would you be able to point out the wires I have to check the voltage on?
As mentioned earlier the Colombo also has a slight irregularity of about 10 herts up and down but the Chinese spindle has about 150 to 200 herts. But now that I think about it I remember that when under load with a large tool the Colombo was doing something similar although we never checked the screen on the VFD back then.

Thanks again and have a good night.

BoX


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