Reasons and solutions for the unclear fonts of the laser marking machine

1.Working principle of laser marking machine

The laser marking machine uses a laser beam to make permanent marks on the surface of various materials. The effect of marking is to expose the deep material through the evaporation of the surface material, thereby engraving exquisite patterns, trademarks and text.

2.Types of laser marking machine

Laser marking machines are mainly divided into three categories: Fiber laser marking machines, CO2 laser marking machines, and UV marking machines.

3.Application of laser marking machine

At present, laser marking machines are mainly used in some occasions that require finer and higher precision. There are many market applications such as electronic components, integrated circuits (IC), electrical appliances, mobile communications, hardware products, tool accessories, precision equipment, glasses and watches, jewelry, auto parts, plastic buttons, building materials, handicrafts, PVC pipes, etc. .

Although the laser marking machine is an indispensable tool for production and processing, it is inevitable that a series of problems will occur in operation, such as the problem of unclear marking fonts. So why does the fiber laser marking machine have unclear marking fonts? How should it be solved? Let’s follow the engineers of BEC Laser to see the reasons and solutions.

4.Reasons and solutions for the unclear fonts of the laser marking machine

Reason 1:

Operational problems may mainly be related to the marking speed being too fast, the laser power current not turning on or being too small.

Solution:

First of all, it is necessary to determine what causes the unclear marking text of the fiber laser marking machine. If the marking speed is too fast, the marking speed can be reduced, thereby increasing the filling density.

Reason 2

If there is a problem with the power supply current of the laser, you can turn on the power supply current or increase the power of the power supply current.

Equipment problems-such as: field lens, galvanometer, laser output lens and other equipment problems, the field lens is too dirty, flowery or oily, which affects focusing, uneven heating of the galvanometer lens, screaming or even cracking, or galvano lens The film is contaminated and damaged, and the laser output lens is contaminated.

Solution:

When the fiber laser marking machine is produced, an fume extractor should be added to prevent fouling. If it is the problem of fouling and fouling, the lens can be wiped. If it cannot be wiped, it can be sent to a professional manufacturer to solve it. If the lens is broken, it is recommended to replace the lens, and finally seal the galvanometer system to prevent the entry of moisture and dust.

Reason 3:

The use time is too long. Any fiber laser marking machine has a limited use time. After a certain period of use, the laser module of the fiber laser marking machine reaches the end of its life, and the laser intensity will drop, resulting in unclear markings result.

Solution:

One: Pay attention to the regular operation and daily maintenance of the fiber laser marking machine. You can find that the service life of some fiber laser marking machines of the same manufacturer and model will be shorter, and some will be longer, mainly Problems when users use operation and maintenance;

Second: When the fiber laser marking machine reaches the end of its service life, it can be solved by replacing the laser module.

Reason 4:

After the laser marking machine has been used for a long time, the laser intensity may decrease, and the laser marking machine’s markings are not clear enough.

Solution:

1) Whether the laser resonant cavity has changed; fine-tune the resonator lens. Make the best output spot;

2) Acousto-optic crystal offset or low output energy of acousto-optic power supply adjust the position of acousto-optic crystal or increase the working flow of acousto-optic power supply; The laser entering the galvanometer is off-center: adjust the laser;

3) If the current-adjusted laser marking machine reaches about 20A, the photosensitivity is still insufficient: the krypton lamp is aging, replace it with a new one.

5.How to adjust the marking depth of the laser marking machine?

Firstly: Increasing the power of the laser, increasing the laser power of the UV laser marking machine can directly increase the depth of laser marking, but the premise of increasing the power is to ensure that the laser power supply, laser chiller, laser lens, etc. must also be matched with it. The performance of related accessories must endure the performance after the power is increased, so sometimes it is necessary to replace the accessories temporarily, but the cost will increase, and the workload or technical requirements will increase.

Secondly: To optimize the quality of the laser beam, it is necessary to replace the stable laser pump source, laser total mirror and output mirror, especially the internal laser material, crystal end pump laser marking body, etc., which will help improve the laser beam quality and thus improved intensity and depth of marking. Then: From the point of view of the follow-up laser spot processing, using a high-quality laser group can achieve a multiplier effect with half the effort. For example, use a high-quality beam expander to make the beam expand a perfect spot similar to a Gaussian beam. The use of high-quality F-∝ field lens makes the passing laser have a better focus power and a better spot. The energy of the light spot in the effective format is more uniform.