Laser marking technology is a new non-contact processing of marking process mode, compared with traditional marking methods, fiber laser marking machine has a high beam quality, high marking accuracy, fast characteristics, a wide range of applications in various industries, has gradually replaced the traditional marking technology. Although fiber laser marking machine has many advantages, but in the process of use sometimes there will be some problems, such as uneven marking effect, which greatly affects the production efficiency. Follow GOLD MARK to see how to solve the fiber laser marking machine marking effect uneven phenomenon.

1. the use of out-of-focus marking a certain range of content

Because each focusing mirror has a corresponding depth of focus range, and the use of out-of-focus approach will easily lead to a wide range of marking patterns, the edge in the depth of focus of the critical point or beyond the depth of focus range, so it is easier to cause the effect of non-uniformity. Therefore, the method of out-of-focus marking must consider the problem of laser energy.

2. the laser output spot is obscured, that is, the laser beam after the vibrating mirror and field mirror spot is missing, not round enough　　

Laser output head, fixed fixture and vibration mirror are not well adjusted, resulting in the laser after the vibration lens part of the spot is blocked, the spot presented by the field mirror after focusing on the frequency doubling film is non-circular, which may also lead to uneven results.　　

There is another situation, that is, the vibrating lens deflection lens has damage, when the laser beam through the lens damage area, can not be well reflected out. Therefore, the laser beam through the lens damage area and the lens without damage area laser energy is inconsistent, the final effect on the material laser energy is not the same, so that the marking effect is not uniform.

3. the phenomenon of thermal lensing　　

When the laser passes through the optical lens (refraction, reflection), it will make the lens heat up to produce a slight deformation. This deformation will make the laser focus focus up, the focal length becomes shorter. If the machine is fixed, the distance will be adjusted to the focal point, open laser after a period of time, because of the phenomenon of thermal lensing and the role of the laser energy density on the material changes, resulting in uneven marking effect.

4. the level of the machine is not adjusted, that is, the laser vibration lens or field mirror lens and the processing table is not parallel　

As the two are not level, it will lead to the laser beam through the field mirror to reach the processing object on the inconsistent length of the distance, the final laser fall on the processing object energy will have inconsistent energy density, at this time will show the effect of uneven on the material.

5. the material reasons, such as inconsistent thickness of the film layer on the surface of the material or changes in physical and chemical properties　

Materials are more sensitive to laser energy response. Usually in the same material, the laser energy to reach the threshold of material damage is certain. When the material coating thickness is not uniform, or there are some other physicochemical treatment process is not uniform enough, the same will also cause the uneven effect of laser marking.

Jinan Gold Mark CNC Machinery Co., Ltd. is a high-tech industry enterprise specialized in researching, manufacturing and selling the machines as follows: Laser Engraver, Fiber Laser Marking Machine, CNC Router. The products have been widely used in advertisement board, crafts and molding, architecture, seal, label, woodcutting and engraving, stonework decoration, leather cutting, garment industries, and so on. On the base of absorbing the international advanced technology, we provide the clients the most advanced production and perfect after-sale service. In recently years, our products have been sold not only in China, but also as far as Southeast Asia, Middle east, Europe, South America and other overseas Markets.

Email:   cathy@goldmarklaser.com
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