MyCNC.pdf
This is my setup everything was working fine I had even cut a couple of jobs with no problems. Then all hell broke loose with the stepper motors going mental when I hit RUN on the VFD. So with looking online as you have guessed it is an EMI problem. The Spindle cable and the Stepper Motors cable are not shielded or grounded. So I have ordered 4 core shielded cable and will change all cables when it arrives, this is no bother to do. But I really could do with some help with the grounding, the more I read online the more confused and scared of making a ground loop or any other mistake that can be made. So if anyone who can help please look at the attached file and tell me exactly where to attach grounding wires. I would be very grateful.... Thanks in advance..

Coco