The CNC plasma cutting machine uses the heat of the high-temperature plasma arc to partially melt the metal at the incision of the workpiece, and uses the momentum of the high-speed plasma to remove the molten metal to achieve the purpose of cutting. That is to say, as long as the plasma arc starts, it means that the plasma power supply can work. However, the arc breaks suddenly after running fine in the daily cutting process. What is causing this and how to deal with it?

In fact, this situation has little to do with the CNC plasma cutting machine itself, so you don't have to worry and complain blindly when you encounter this kind of problem.

Generally there are the following four situations:

1. The air pressure is insufficient or the air flow is too small. During the cutting process, the flow rate of the air compressor should be ensured, and some customers tend to ignore this detail; at this time, it is only necessary to adjust the air pressure and replace the large air pipe or air compressor;

2. The perforation time is too long. The set perforation time is too long is also one of the reasons for the arc breaking. It is enough to adjust the perforation delay accordingly. In fact, in many cases, it is not necessary to set the perforation delay.

3. The height of the cutting nozzle from the steel plate is too large; a major factor for the arcing of the CNC plasma cutting machine is the height of the cutting nozzle from the plate. In a few cases, the arc may have started, but in fact it is reluctant, so it may cause re-cutting A sudden arc break occurs during the process;

4. The arc voltage height controller fails. The function of the arc pressure height adjuster is to adjust the height of the plate and the cutting nozzle to maintain a stable equilibrium value; the cutting machine has little problem when cutting a flat plate, but there is a problem with the arc pressure of an uneven plate. It's easy to go wrong. At this time, you need to check it first, and use the multimeter DC500V to measure the arc pressure line of the CNC plasma cutting machine (usually DC60-200V).