Fiber laser marking machine marking effect fault solution

Fiber fiber laser marking machine is widely used in our life, and the logo pattern logo on the surface of various metals and most non-metal materials can be used to make good results. However, many customers will encounter various problems when using optical fiber laser marking machines. Here we will take a look at the solutions to various problems!

First, use off-focus marking because each focusing lens has a corresponding focal depth range, and using off-focus method will easily lead to a large-scale marking pattern, the edge is at the critical depth of focus point Or beyond the range of the depth of focus, which is more likely to cause unevenness in the effect. Therefore, the method of off-focus marking must consider the problem of laser energy.

Second, the laser output spot is blocked, that is, the laser beam is missing after passing through the galvanometer and field lens, and the laser output head, fixing fixture and galvanometer are not adjusted properly, which causes the laser to pass through the galvanometer. When part of the light spot is blocked, the light spot on the frequency doubling film is non-circular after being focused by the field lens, which may also lead to uneven effect. There is also a situation that the galvanometer deflection lens is damaged, and when the laser beam passes through the damaged area of u200bu200bthe lens, it cannot be reflected well. Therefore, the laser energy of the laser beam passing through the damaged area of u200bu200bthe lens is inconsistent with that of the non-damaged area of u200bu200bthe lens, and the final laser energy acting on the material is also different, so that the marking effect is uneven.

Three, thermal lens phenomenon When the laser passes through the optical lens (refraction, reflection), it will cause the lens to heat up and produce slight deformation. This deformation will raise the focus of the laser and shorten the focal length. If the machine is fixed and the distance is adjusted to the focal point, after the laser is turned on for a period of time, the laser energy density acting on the material will change due to the thermal lens phenomenon, resulting in uneven marking effect.

Fourth, the level of the machine is not adjusted properly, that is, the laser galvanometer lens or the field lens and the processing table are not flat. Because the two are not level, the fiber laser marking machine beam will reach the processing object after passing through the field lens. If the distance on the surface is inconsistent, the final energy of the laser falling on the processed object will have inconsistent energy density, and at this time, the effect will be uneven on the material.

5. The reasons for the material, such as inconsistent film thickness on the surface of the material or changes in physical and chemical properties, the material is more sensitive to laser energy response. Usually under the same material, the laser energy reaches a certain material damage threshold. When the thickness of the material coating is different, or some other physical and chemical treatment processes are not uniform enough, it will also cause unevenness in the effect of laser marking.

Internal factors mainly include laser frequency, laser spot pattern and beam divergence angle, laser power, reasonable optical forming and auxiliary gas and material handling. Internal factors are mainly noticed during early model matching and should be purchased following the advice of the laser engineer. Another factor that customers need to pay attention to is the main processing, mainly for marking density, marking format, marking depth and laser spot size Marking density: in the case of the same format, the same spot, the same depth, the higher the density of the marking , the corresponding marking speed will be slower because the density directly increases the marked area. Marking format: The large-format marking galvanometer deflection area increases, so the large-format marking speed is slower than the small-format marking speed. Marking depth: According to the needs, if you need to deepen the mark, you need to adjust the parameters of the fiber laser marking machine, increase the power and current of the fiber laser marking machine, etc. Standard speed. Laser spot size: A smaller spot size corresponds to a smaller cursor, so the larger the spot, the faster the marking.

Of course, the above-mentioned fiber laser marking machine equipment has been well optimized and adjusted. If the above phenomenon occurs when you buy equipment from other places, you may try the methods I mentioned.

The main products of Laser Technology Co., Ltd. include: fiber laser marking machine, carbon dioxide laser marking machine, laser cij printer, metal laser cutting machine, laser welding machine, etc. We provide customers with: customized development of automation equipment, design, development and installation of fully automatic production lines in factories, laser precision machining, and laser equipment rental.

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