In the process of daily laser engraving and cutting machine processing, we often encounter the possibility of insufficient power at any time, or no light, short life of the laser tube, irreparable damage of the laser tube, etc. Most of the reasons may be that the daily maintenance of the laser tube we use is not enough, Now let's talk about the daily maintenance of the laser tube (laser) and the solutions to common laser tube failures;

Spite Laser participated in ISA exhibition in America

The following is an analysis of the experience of many years of laser engraving and cutting machine processing masters:

1、 When using, please connect the cooling water first, adjust the position of the water outlet pipe according to the principle of low inlet and high outlet, ensure that the cooling water is full of the cooling pipe, and there is no bubble in the pipe, and then turn on the power. Requirements: The cooling water shall be soft water (distilled water or purified water), and attention shall be paid to the temperature of the cooling water. The water temperature shall be controlled within the range of 25 ℃ - 30 ℃, and shall not be too high or too low, especially in summer. Once the water temperature is too high, the cooling water shall be replaced or shut down for a rest period: the cooling water in cold areas shall not be frozen, especially after the laser is shut down, the cooling water shall not be stored in the laser tube, To prevent the cooling water from freezing and causing explosion. (Special attention: the cooling water tank must be grounded for users using AC power).

2、 The two supporting points of the laser tube shall be at a point 1/4 of the total length of the laser tube, and the flow of cooling water shall be 2L-4L/min; Otherwise, the effect is not good, which will cause mode hopping, and the light spot will change several points, leading to power reduction; The cooling water return port must be covered by water in the water tank, otherwise the cooling water in the laser tube will not be fully filled every time the machine is turned off.

3、 Pay attention to protecting the output window of the laser to prevent the smoke generated during the operation (including the process of debugging the optical path) from splashing onto the surface of the output window, and prevent the external surface of the output window from being polluted and the power will drop. At this time, gently wipe the external surface of the output window with absorbent cotton or silk cloth dipped in absolute alcohol;

4、 During debugging, adjust the laser support point or rotate the laser orientation to achieve the best output effect, and then fix the laser.

5、 Please pay attention to: avoid dust accumulation near the high-voltage electrode, keep it dry, and keep the high-voltage end as far away from the metal as possible to prevent high-voltage spark discharge.

6、 During the use of the laser, no scale can be formed in the cooling pipe to avoid blocking the cooling water and poor heat dissipation effect. Once found, the cooling pipe can be cleaned with 20% diluted hydrochloric acid to remove scale.

7、 The laser is glass and fragile. Avoid local stress during installation and use.

8、 Rationalize the application of laser tubes, save laser energy, and the best working current of laser tubes is 16 mA.

Common troubleshooting of laser tube (What should we do if the laser tube is not powerful enough, the engraving is not deep, the high pressure ignites, or the laser tube breaks?)

1、 Not deep:

1. Once the light is emitted, the engraving is not deep: first, check whether the supporting point of the laser tube is reasonable, whether the light intensity is set too small, whether the optical path is offset, whether the focal length is correct, whether there are scratches and dirt on the surface of the ytterbium sheet, and whether the flow and flow pressure of the cooling water are normal. If the above items are OK, check whether the lens in the optical outlet of the laser tube has scratches and dirt. If it is also normal, it is a quality problem of the laser tube itself.

2. After a while, the light will not be deeply engraved: for this problem, first check whether the supporting point of the laser tube is reasonable, whether the water temperature exceeds 30 degrees, whether the lens is hot during operation, whether the flow and flow pressure of cooling water are normal, and whether the cooling water is clean. Then check the laser tube after the above is normal;

2、 High voltage ignition and discharge:

Check whether there is dirt and moisture around the high-pressure head and whether it is too close to the metal part of the machine; In addition, whether the high-voltage connection device of the laser power supply has fallen off the support, and whether the high-voltage connection device is broken or damaged inside. If the above is normal, it is the quality of the laser tube itself.

3、 The laser tube is broken, cracked, and the water cooling head falls off:

1. Whether the water temperature is controlled within the range of 25 ℃ - 30 ℃. The cooling water in cold areas shall not freeze, especially after the laser is stopped, the cooling water shall not be stored in the laser tube.

2. Whether the luminescence works under the control of water protection; (Test whether the light will shine or not with the water on and off)

3. Whether the water pipe of the waterway can be broken.

4. Whether there are bubbles in the laser tube.

5. Whether the water pressure and flow are normal; Whether the flow direction is low and high.