Electromagnetic interference of CNC control system caused by external and internal of the CNC machine.

External interference: Fluctuations in the power grid, large electrical equipments’ start and stop(like electrical furnace, big motor, welding machine, etc), electromagnetic from high-voltage equipments or electromagnetic switches, cables common code interference.

Internal interference: from CNC machine electric cabinet, like electric arc generated by the auxiliary relay or AC contactor, harmonic of frequency inverter, motor start-stop, interference of distributed capacitances or inductances, potential difference by multiple earthing.etc.