The plexiglass cutting process will generate heavy oil fume. Such fume may affect the laser spot and output power, causing the laser beam unable to fully cut through the plexiglass. In order to reduce the failure rate of CO₂ laser tubes, we have the following suggestions for users of our products:

1. The phenomena mentioned above is more likely to happen among laser tubes with higher power while cutting thick plexiglass. For example, the output power of model 2000K7 and 1800U7 laser tubes is more likely to be affected than that of model 1600F7 laser tubes. Though the fume generated by cutting plexiglass may affect the outpower of laser tubes, the smoke generated by cutting woods will not affect the cutting speed.
2. Large operating area and bad ventilating capacity will make oil fume easier to pollute the laser system. Laser tubes inside cutting beds and large laser cutting machine such as model 1313, model 1614, model 1814 are more likely to fail to cut through the plexiglass at “mirror B”.

2. If the laser output power is unstable in plexiglass cutting, user shall use a fan to blow the cutting materials or replace the plexiglass into woods for test. If the output power is no longer unstable in the test, the oil fume generated by plexiglass cutting is proved to have effects on the laser tubes.
3. When using laser tubes with high power, users shall optimize the ventilation system of laser machines by increasing the number of fans and the area of ventilating inlet, changing the air inlet to the side and back of the machines, or using larger fans.
4. User shall regularly clean the ventilation system to prevent it from blockage, so that the effects of oil fume on the cutting speed can be reduced.