Problems of metal laser marking machine and its application in plastics

Failure 1: The laser intensity decreased and the marking was not clear enough.

Solution: .

1 Whether the laser resonator changes, fine-tune the resonator mirror to make the output spot the best.

2 If the acousto-optic crystal is offset or the output energy of the acousto-optic power supply is low, adjust the position of the acousto-optic crystal or increase the working current of the acousto-optic power supply.

3 The laser entering the galvanometer is off-center: adjust the laser.

4 If the current is adjusted to about 20A and the photosensitive intensity is still not enough: the krypton lamp is aging, replace it with a new one.

Fault 2: The krypton lamp cannot be triggered (refer to the NTP power supply manual).

Solution: .

1Check all power cables.

2 The high pressure krypton lamp is aging, replace the krypton lamp.

Precautions for operating the laser marking machine.

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

2 The Q power supply is not allowed to work without load (that is, the output terminal of the Q-adjusted power supply is suspended).

3 If there is an abnormal phenomenon, the laser marking machine first turns off the galvanometer switch and the key switch, and then checks again.

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

5 Note that the output end (anode) of the laser power supply should be left in the air to prevent ignition and breakdown with other electrical appliances.

6 Keep the inner circulating water clean, clean the water tank regularly and replace it with deionized water or pure water.

The use and replacement of krypton lamps.

1 Turn off the water cooler and laser power.

2 Open the upper three cavity covers, take out the lamp or crystal to be replaced, put it in after replacement, and install the cavity cover.

3 Turn on the water cooler and the laser power supply, adjust the laser power supply current to about (15~20)A, and place a small piece of wood between the front diaphragm and the beam expander Or black paper, you should see the light spot formed by laser ablation, if not, slightly adjust the three knobs of the front diaphragm holder until the light spot appears.

4 After the laser is debugged, the three knobs of the front diaphragm holder should be adjusted repeatedly to make the spot Z strong. If the laser is too strong or the brightness is too high, the UV laser marking cannot be observed. When the machine is running, the power supply current can be reduced.

5 Turn off the laser power.

Special attention: the time to replace the krypton lamp.

The krypton lamp in the laser indicates that the service life of the krypton lamp is 300 hours. However, due to the different use conditions of users, the above time cannot be used as the only basis for replacing the krypton lamp. With the increase of use time, the luminous efficiency of the krypton lamp decreases, and the laser output also weakens. In order to obtain enough laser output, many users increase the current of the laser power supply to make the krypton lamp more luminous, which accelerates the aging of the krypton lamp and forms The vicious circle sometimes leads to the phenomenon of lamp explosion. In order to prevent this phenomenon from happening, we recommend that users decide whether to replace the krypton lamp according to the following methods.

When a new krypton lamp is replaced, record the value of the laser power ammeter during normal marking as the standard current value.

Laser marking machines for materials are also widely used. According to different materials, several different machines can be selected to achieve the same performance as IC automatic laser marking machines. Effects, laser marking machines can be applied to numbers, texts, trademarks or machine-readable codes, such as data matrices with high information density, arranged in compact spaces at different scales.

Precision marking: Like the metal marking machine, it also has good focusing ability, so the laser beam quality suitable for the precision marking machine is high, which makes the marking process Very small focusing diameters can be achieved with the laser beams in the , and in this way precise marking track widths down to nanometers can be achieved on microcomponents.

Adapt to the absorption characteristics: the laser used for marking usually produces infrared wavelengths, green lasers and ultraviolet lasers are for the special marking application of laser engraving machines for semiconductor materials of hope boxes. The use of mid-ultraviolet wavelengths opens up new possibilities for laser marking of materials. Short-wavelength photochemistry reacts directly with materials that are compounded, without heating, and will not cause damage to materials. Laser marking machines play a role in the material industry. played a very important role.

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