Thanks Russ,
I missed your point of testing the 5000 revs as a chuck style rotary, was doing it always as a roller. I think I have the rotary behaving as it should. So if I get a 100 mm high box resulting in a Y height of something different, I should calibrate the Y-axis accordingly in Machine Settings to get it perfect?
As far as buzz is concerned, I cleaned-up through hole where the ground lug for power cable is attached, are there others I should look for? Also, I think I have isolated the issue to the HV power supply. Once I disconnected both Main Power feed wires and the ground to it, the buzz was gone. Now I just have to find the replacement HV power supply.
Here is the link to the post I referred to above: Setting for rotary
Thanks for always being quick to respond…