Laser cutting heads often appear black spots on the lens? Or white dots?

<1> Black dots:

First of all, the black dot components on the protective lenses are mostly slag splash adhered to the lens, so it reflects the importance of regularly checking the cleaning protective lens. If it is not found in time that the lens has black spots stuck, then accumulate over a long period, it will affect the light transmission of the protective mirror, affect the focal length, so that the laser beam can not be well focused on the surface of the sheet, affecting the cutting; much more serious, it will cause the protective mirror to become thin and penetrate, and then lose its protective effect, resulting in damage of the laser head.

Solution :

Generally speaking, black spots on the protective lenses are difficult to remove because the black spots have adhered to the protective lens and invade the protective lens. At this time, the protective mirror is no longer usable, so only the new protective mirror should replace.

If you want to slow down the black spot of the protective mirror, you should start from the equipment itself. The most important thing is to reduce the slag splash. To put it bluntly, it is the workpiece cutting quality problems, which need to check the focus, power, auxiliary pressure, combined with the workpiece processing quality of uniform adjustment.

 [1] Produces a droplet of tiny regular burrs

Possible cause: 1. Focus position is too low  2. Feed rate is too high

Solution: 1. Raise the focus position  2. Reduce the feed rate

[2] Both sides produce long irregular filamentous burrs, the surface of the large plate discoloration

Possible cause: 1. Focus position is too high  2. Feed rate is too low  3. The auxiliary gas pressure is low  4. The material is hot

Solution: 1. Drop the focus position  2. Increase the feed rate  3. Increase the gas pressure  4. Cooling material

[3] Produces long irregular burrs only on one side of the cutting edge

Possible cause: 1. Focus position is too high  2. Feed rate is too low  3. The auxiliary gas pressure is low  4. Nozzle misalignment

Solution: 1. Drop the focus position  2. Increase the feed rate  3. Increase the gas pressure  4. Centering nozzle

[4] Waste is discharged from above

Possible cause: 1. Feed rate is too high  2. The auxiliary gas pressure is high  3. Power is too high

Solution: Press the pause button immediately to prevent slag from splashing onto the focusing mirror. Increase power and reduce feed rate and pressure

<2> White dots:

The reason for the white point is generally because the cooling water in the cold water tank is not pure, or the air compressor equipped needs to be cleaned. Therefore, Oreelaser recommends that the cooling water should be replaced in time and the air compressor should be cleaned at the same time.