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

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The laser marking machine can mark various materials that are common in our lives, such as metal, plastic, wood, pcb board and other materials. During the operation of the laser marking machine, choosing different parameters and marking workpieces of different materials will affect the marking depth of the marking machine, sometimes resulting in too shallow or too deep marking effects. The following Leapion Laser will share with you how to adjust the marking depth of the laser marking machine.

First, increase the power of laser marking machine laser

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

Second, optimize the quality of the laser beam

Optimizing the quality of the laser beam requires the replacement of a stable laser pump source, laser total mirror and output mirror, especially the internal laser material, crystals, etc. This will help improve the quality of the laser beam and increase the intensity and depth of marking.

Third, use a high-quality laser set

From the point of view of laser spot processing, the use of 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 enables the passing laser to have a better focus power and a better spot. It is used to make the energy of the light spot more uniform in the effective format.

Fourth, adjust the appropriate laser focal length

Adjust the focal length of the laser properly. If the above method is not enough, you can try a better field lens with a shorter focal length to increase the energy of its beam. When we increase the focal length, we should hear the sound of the laser beam hitting the surface of the workpiece material as the standard. At this time, the focus is The upper energy is supreme, and the effect for deep drilling is also very obvious.

Fifth, try to replace a better field lens or a smaller field lens

Turn the field lens of the laser marking machine into a small field lens. After the change, the marking depth will be deeper.

For example, the current semiconductor marking machine can be equipped with a 110 field lens, which becomes a 50 field lens. The total laser energy and lettering depth will reach about twice the previous effect.


When we buy a laser marking machine, we must first understand what kind of workpiece our product is, what features and requirements, and have a better long-term plan. For example, the depth of the workpiece is shallower now, but it will be deep in the future. Mark. So when we buy, we must purchase with the deepest configuration.

Have you learned how to adjust the marking depth of the laser marking machine? For more professional questions about laser marking machines, please contact Leapion Laser.