Thanks Eddycurrent,
I have my spindle screen connected at the VFD end only, should I connect the screening at both ends the VFD and the spindle?
I did twist all wiring when I built the CNC router as I knew this helps with screening but since I am going to totally rewire it I am going to make sure that it is properly done so that there is no chance of interference again.
Another question is, there is eight wires at the stepper motor four pairs, there would be no screening the last few inches or would you add some screening or will it matter for the last few inches?