1. Check and maintain the equipment: to ensure that the light path is normal, the waterway is smooth, and the head is clean and normal work.

2. Reduce the laser power: reduce the temperature inside the laser cutting head by reducing the laser power, but doing so may reduce the cutting speed and cutting quality, so it is necessary to plan a suitable cutting program in advance.

3. Embedded cooling rod or the use of coolant: the cooling rod can be directly embedded inside the head, through the action of current heat dissipation, and the use of coolant is through the pipe flow through the head, take away the surface heat, through the radiator to achieve cooling.

4. If the above methods can not solve the problem, may need to consider replacing the head or other cooling measures for the head.