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Detailed solutions to common faults in laser marking machines


Common faults and treatment measures of laser marking machine:

 

 1., the use of new equipment for a long time, laser laser output power is weak:
The output power of the laser measured at the factory is up to the technical target;
The accuracy of the resonator adjustment meets the requirements;
The whole film is anti leakage phenomenon;
Is the insertion loss of the acoustooptic switch within the specified range?.
2. after using a period of time, laser laser output power decline reasons:
Whether the laser resonator changes: fine-tuning the resonator lens, so that the output spot is the best;
Is there any fouling in the output and output diaphragms?;
The output of acousto-optic crystal is low or the output power of acoustooptic power is low;
The temperature difference between the water temperature of cooling water tank and ambient temperature is over 5 centigrade;
Does the life time of krypton lamp expire?;
Enter into the Laser Galvanometer: adjusting the laser off center;
If the current 20A is still strong enough to light: krypton lamp aging, replacement lamps.
3., the laser output power is normal, but the laser beam can not play the role of marking:
How accurate is the optical path adjustment?;
Whether the acoustooptic switch can act as a switch;
The D/A card controls whether the acoustooptic output signal reaches 5V.
4. acousto-optic switch can not play the role of switching laser:
RF power output of acousto-optic power supply is normal;
Are the power switches in the correct position?;
Is the RF wire connection reliable?;
4. Whether or not the Q switch has any fouling at the end of the light.
5. reasons for not meeting the expected depth of marking:
Does the laser output power meet the requirements?;
Does the turn off power of the acoustooptic switch meet the requirement?;
How accurate is the optical path adjustment?;
Is the location and direction adjustment of the beam expander accurate?;
Is there any pollution on the lens surface?;
The surface of the workpiece is in the focal plane;
The laser output DC voltage of the power supply 28V is decreased, the laser output power decreased.
6. why krypton lamp cannot be ignited:
Does krypton lamp achieve service life?;
Whether the two electrodes of krypton lamp are connected to the connecting wire of the laser power supply are reliable;
Is the working state of the laser power supply normal?.
7. D/A cards exhibit several major problems:
Fourth feet have no acoustooptic opening signal (+5V), which makes the acoustooptic power supply unable to open;
Analog signal output can not accurately reflect the design content, that is, garbled phenomenon;
The work of AD is abnormal, and the printed line is dashed line.
The 8. galvanometer scanning heads exhibit several major problems:
Standard square printed into a ladder or diamond;
Pillow shape or barrel shape deformation of square frame.
Method for solving printing distortion of 9. galvanometer scanning head:
The pincushion or barrel distortion is an inherent phenomenon of galvanometer marking, which is determined by galvanometer scanning mode. The solution is to correct the distortion;
There are two kinds of correction methods, one is hardware correction, and the other one is less used. Another is software correction, which is one of the more widely used;
The method of hardware correction is to change the analog voltage of the D/A card through a correction card, change its voltage value according to certain rules, and then transmit the signal to the vibration lens;
The software correction method is the marking software itself, with correction function. During the marking process, the digital signal is processed according to a certain method, and then the signal is transmitted to the D/A card.
10. laser print lines into virtual lines:
The signal line is connected, there is no weld;
Is there any problem between the driving plate of the vibration lens and the connecting line of the motor?;
When the D/A card is inserted into the PCI slot, is it positioned correctly?;
AD work is normal?.

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