Should there be a gap at the joint of cutting lines after the mainboard is replaced?

The cause is that the laser tube model is not correctly set.

A default laser tube model will be set in the firmware (mainboard) before GCC ships the mainboard to the customer. The default laser tube model might be different if the board is replaced on a customer’s machine - it might need to be modified.

Modifying the laser tube model:

Will it shorten the lifetime of my laser tube if the power setting is at 100%?

THIS IS A MISCONCEPTION!

Perhaps you will feel that setting the laser tube at its power limit (power set to 100%) might bring negative consequences, especially in regards to the lifetime of laser tube. Indeed, for most industrial products this critical operation might shorten its service life. However, we have to realize one thing first - for a laser tube, outputting at a 100% level is not a kind of critical operation, too high of an unstable current is.

While the power supply of the laser tube is outputting a regular and stable current to the laser tube, no matter which power level you are using, it won’t affect the service time of the tube even if you set the power level at 100% in the driver.

Does the purity of air (Oxygen or Nitrogen) affect the cutting quality?

Based on internal testing, higher purity levels result in higher cutting quality. Downside to this is that the cost of higher purified air is more costly.
We suggest Oxygen purity of 99.8%(2N8) or higher.
The purity of Nitrogen should be 99.995% (4N5) or higher.

We have seen an increase in damaged machines due to the use of fake filters.

Purex Product Brochure for Fume Extractors 200 and 400