Pressing the button didn't work for me

Hood, another question for you.
every now and then one of my servo motors makes a buzzing sound without moving, if the motor moves to any position it then stops, I can then move the motor back to where it was and it will be fine. If I don't move it then the breaker inside my machine trips. Any idea what is causing this and how to resolve the issue?

Sounds like servo tuning, you are getting dithering and its likely causing the motor to heat and trip on a thermal fault.
Hood

Any ideas what I need to tweak in motor tuning to fix this?

You just need to get the tuning as best you can, it may be the tuning in the drive is way off and thus it makes it hard for the CSMIO to keep it still or it could be you just need to fine tune it in the CSMIO.
Hood

A little update, the machine has been up and running for around a year now. No issues really.I had to tune the servo driver as hood suggested to one axis but all seems good.

The next job I have is to fit the VFD. Does anyone know where I can buy some pulleys from to replace the varispeed head? While the head is apart I also plan to replace the bearings as these are getting noisy. Can I get these in the UK for reasonable money?