The reasons why the CNC plasma cutting machine does not spark when it comes out may include:

1. The button switch may be damaged and needs to be replaced.

2. If there is a problem with the high-frequency arc ignition part, check whether there is arc passing between the black rods of the spark arrester, and adjust the distance between the black rods of the spark arrester.

3. The CNC plasma cutting machine electrode nozzle on the cutting gun is not installed in place or is of poor quality. It needs to be replaced with high-quality accessories.

4. The power supply voltage problem, such as too low or too high, needs to be adjusted.

5. Gas supply problems, such as insufficient air pressure or interruption, the gas pipeline needs to be checked and reconnected.

6. The connection line is loose or open and needs to be checked and reconnected.

7. Circuit problems, such as damaged power cords, switches and other circuit components, need to be inspected and replaced.

8. The temperature is too high and you need to wait for a period of time to cool down before starting.

Troubleshooting these CNC plasma cutting machine problems usually involves checking and adjusting equipment settings, replacing damaged parts, or adjusting the equipment to restore its normal operation. If the problem is not solved after self-inspection and adjustment, it is recommended to contact a professional for maintenance.