1. The current adjusted by the plasma power supply on the CNC plasma cutting machine is too small, and the plate is too thick, so it will not cut through
2. The ground wire of the plasma power supply of the CNC plasma cutting machine is not connected to the cut sheet
3, the air pressure provided to the ionization power supply is too small
4. The water content in the gas supplied to the ionization power supply is too high
5. The plasma cutting nozzle used is too small.