1.Slag: mainly due to improper parameter settings, resulting in cutting slag back splash to the lens. It can be solved by adjusting the process parameters of cutting or piercing, such as the height of the follower, cutting air pressure, laser pulse parameters.
2.Oil or dust: The auxiliary gas itself or the gas flow pipe is polluted. Can be added by adding filtering devices to prevent and control, filter oil or filter dust.
3.Water mist: generally caused by the temperature difference is too large. Ambient temperature is too high, cutting gas temperature is too low, the protective mirror in the ambient temperature condensation formation, you can adjust the temperature of the two so that it is not much to solve.

1. The cutting gas flow is small, which can't cool the copper nozzle sufficiently. You can use high-pressure nitrogen as an auxiliary gas, high-pressure nitrogen cooling effect is good.
2. Copper nozzle cooling gas is not used. Adaptation of copper nozzle cooling gas can reduce the heat generated by the copper nozzle.
3. High focus cutting, the laser is easy to hit the small nozzle, so that the nozzle overheating. It is necessary to adjust the focus or increase the nozzle caliber when the nozzle is not hot.
4. Carbon steel in the cutting, the oxidation reaction occurs, generating a lot of heat. This situation can not be avoided, you can properly adjust the distance between the nozzle and the material.