Thanks Hood!
I have rewired the entire machine. E-stop, home sensors, spindle motor and steppers all have shielded wire. I have a control box that houses everything, power, speed control and stepper control. The stepper motors have just wires coming out with no shielding. My question now is do I ground both sides of the wire and shield the steppers or ground just the control box side? Or am I in for more R&D?
Thanks Vogavt, that’s a great story.