Laser marking 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, or to "carve" traces through the chemical and physical changes of the surface material caused by light energy, or to burn off part of the material through light energy to show the required etching Patterns, text.

Currently, there are two accepted principles:

"Heat processing" has a high energy density laser beam (it is a concentrated energy flow), irradiated on the surface of the processed material, the surface of the material absorbs the laser energy, and generates a thermal excitation process in the irradiated area, so that the surface of the material (or Coating) temperature rises, causing phenomena such as metamorphosis, melting, ablation, and evaporation.

"Cold working" has a very high energy load (ultraviolet) photons, which can break the chemical bonds in the material (especially organic materials) or the surrounding medium to cause the material to undergo non-thermal process damage. This kind of cold processing is of special significance in laser marking processing, because it is not thermal ablation, but cold peeling that breaks chemical bonds without the side effects of "thermal damage", so it does not affect the inner layer and nearby areas of the processed surface producing heating or thermal deformation. For example, in the electronics industry, excimer lasers are used to deposit thin films of chemical substances on base materials and to make narrow grooves on semiconductor substrates.

When using the laser marking machine, pay attention to the below six points:

1. It is strictly forbidden to start the laser power supply and Q-switch power supply under the condition of no water or abnormal water circulation;

2. no-load operation of Q power supply is not allowed (that is, the output terminal of Q-switching power supply is suspended);

3. If an abnormal phenomenon occurs, first turn off the galvanometer switch and the key switch, and then check;

4. It is not allowed to start other components before the krypton lamp is ignited to prevent high voltage from entering and damaging the components;

5. Pay attention to the laser power output terminal (anode) hanging in the air to prevent ignition and breakdown with other electrical appliances;

6. Keep the internal circulating water clean. Clean the water tank of the laser marking machine regularly and replace it with deionized water or pure water.

Pls observe the above precautions during use, and use the laser equipment correctly, so as to extend the service life of the equipment and reduce the cost.