What should I do if the 355nm laser uv laser is weak and the marking is uneven?

After the UV laser marking machine has been used for some years, there have been various small faults, such as: the laser does not emit light or the light output is weak, marking. uneven graphics, power drop, polarized light, etc. So why does such a problem occur? When these problems occur, how should we investigate and how to solve these problems? The following users follow the Yingyi intelligent laser editor to learn about it.

1. The output DC 30V voltage of the laser power supply drops, which causes the laser output power to drop: then the power supply needs to be replaced.

2. The optical path system is inaccurate: adjust the laser, adjust the position of the beam expander, the incident light should be in the center of the light entrance hole of the beam expander, and the outgoing light should be in the center of the light exit hole.

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3. The marking speed is too fast: slow down the speed.

4. The workpiece surface is not on the focal plane: adjust the workpiece surface to the focus

5. The position and direction of the beam mirror are not accurate: the poor adjustment of the beam expander has a great impact on the laser marking effect, which is mainly reflected in:

⑴, laser power drops;

(2) The laser intensity is uneven in the marking width;

(3) The computer software sets the center to deviate from the physical center of the light-emitting lens of the galvanometer;

⑷, can not play a beam expansion effect.

6. The service life of the laser is too long, resulting in attenuation: a new laser needs to be replaced.

7. Lenses and lenses are stained: need to be cleaned or replaced.

8. The laser entering the galvanometer is off-center: adjust the laser.