Quote Originally Posted by Clive S View Post
Ok First make sure the machine frame is earthed to the star point in the control box, make sure the screen on the spindle cable is earthed at one end only (solder a wire to the screen and ground it to the spindle body)

Are all your other cable screens grounded to the star point (In the control box you should have only one point where everything is grounded to)
In the control box, I have main 220Volt house power earthed to the corner of the mounting plate, The Stepper Drivers are bolted to the plate, and the Torroidal Transformer is also bolted to the plate.
Then I have a single earth wire coming off that same corner to a small ACDC transformer, and another single wire that goes off then splits to 4 and is the AC earth for my woodchip / 2 x pond pumps and Spindle power inverter.

So I should earth the spindle + Spindle sleeve to earth in the inverter? or back to star?


From DC transformer - all that suff plugs directly into the stepper drivers etc....