Dongguan laser marking machine, laser laser engraving machin
source：http://en.dgjx123.com/news/65.html release time：2018-12-30
After using the laser marking machine in Dongguan for a period of time, there will be some problems, such as the power of the Dongguan laser marking machine. When the laser marking machine appears, how can the laser laser engraving machine be reduced? Let's take a look at the common faults and treatments of laser marking machines.
1. The reason why the laser laser output power is weak is that the new equipment is not used for a long time:
1 Whether the measured laser output power at the factory reaches the technical index;
2 Whether the accuracy of the cavity adjustment meets the requirements;
3 Whether the full-reflection film has light leakage;
4 Whether the sound and light switch insertion loss is within the specified range.
2. After the laser marking machine is used for a period of time, the laser laser output power drops:
1 Whether the laser cavity changes: fine-tuning the cavity lens to make the output spot;
2 All the reverse and the output diaphragm are stained;
3 Acousto-optic crystal shift or low output energy of acousto-optic power supply: adjust the position of the sound and light crystal;
4 Whether the temperature difference between the cooling water tank water temperature setting and the ambient temperature exceeds 5 °C;
5 Whether the service life of the xenon lamp has expired;
6 The laser entering the galvanometer is off center: adjusting the laser;
7 If the current is adjusted to about 20A, the sensitivity is not enough: the xenon lamp is aging and the new lamp is replaced.
3. The laser marking machine laser output power is normal, but the laser beam can not play the role of marking:
1 Whether the adjustment of the optical path system is accurate;
2 Whether the sound and light switch can function as a switch;
3 D/A card controls whether the sound and light output signal reaches 5V.
4. The laser marking machine sound and light switch can not play the role of switching laser:
1 Whether the RF output power of the sound and light power supply is normal;
2 Whether the power switches are in the correct position;
3 Whether the RF line connection is reliable;
4 Q switch light-passing end face with or without fouling.
5. The reason why the laser marking machine can not achieve the expected marking depth:
1 Whether the laser output power meets the requirements;
2 Whether the acousto-optic switch off power meets the requirements;
3 Whether the optical path adjustment is accurate;
4 Whether the position and direction adjustment of the beam expander is accurate;
5 Whether the lens surface is contaminated;
6 Whether the surface of the workpiece is on the focal plane;
7 Whether the laser power output DC voltage 28V drops, resulting in a decrease in laser output power.
6. Laser marking machine The reason why the xenon lamp cannot be ignited:
1 Whether the xenon lamp has reached the end of its service life;
2 Whether the electrical laser power cable connection at both ends of the xenon lamp is secure;
3 Whether the laser power supply is working properly.
7. Laser marking machine D / A card shows several major problems:
1 There is no sound and light turn-on signal (+5V) on the 8th foot, which causes the sound and light power supply to not turn on;
2 The analog signal output can not accurately reflect the design content, that is, garbled phenomenon;
3 AD7237 is not working properly. The phenomenon is that the printed lines are dotted lines.
8. Laser marking machine galvanometer scan head shows several major problems:
1 standard squares printed in trapezoidal or diamond shape;
2 The square frame has a pincushion or barrel deformation.
9. Laser marking machine galvanometer scanning head printing distortion solution:
1 The generation of pincushion or barrel distortion is an inherent phenomenon of galvanometer marking, which is determined by the galvanometer scanning method. The solution is to perform signal correction on the distortion;
2 There are two methods of calibration, one is hardware correction, and currently used less. The other is software correction, which is currently used by us;
3 The method of hardware calibration is to change the analog signal outputted by the D/A card through a calibration card according to a certain rule, and then transmit the signal to the vibration lens;
4 The method of software calibration is that the marking software itself is provided with a correction function. In the marking process, the digital signal is processed according to the method, and then the signal is transmitted to the D/A card.
10. The laser marking machine laser prints lines in a dotted line:
1 Is the signal line connected and there is no solder joint;
2 Is there a problem with the lens driver board to the motor cable?
3 When the D/A card is inserted into the ISA slot, the position is correct;
4 Is the AD7237 working properly?
11. Laser marking machine circuit problems:
1 Due to long-term operation, the terminal of the xenon lamp is loose, causing the lamp to be incombustible or sparking;
2 Due to long-term operation, the air conditioner does not cool. First, check whether the connecting parts are tight. Secondly, check whether the upper and lower temperature setting of the temperature controller is reasonable. The upper and lower limits of the temperature controller should be set according to the ambient temperature ±4 °C. If there is a Freon leak, the connecting parts should be reinforced and professionals should be added to Freon.
12. Problems with the optical path of the laser marking machine:
1 Due to long-term operation, the xenon lamp is aging, resulting in a decrease in laser output power;
2 Due to long-term operation, the dielectric diaphragm has different degrees of fouling, resulting in total mirror leakage or output power reduction;
3 Due to human factors, the customer adjusts the position of the resonant cavity or the position of the dielectric diaphragm without knowing the specific situation, resulting in a decrease in the laser output power or a large laser divergence angle, resulting in a large change in the output laser position.
13. Laser marking machine beam expander adjustment problem:
1 The adjustment requirements of the beam expander: the incident light should be at the center of the aperture of the beam expander, and the exit light should be at the center of the exit hole;
2 The adjustment of the beam expander has a great influence on the laser marking effect. Mainly manifested in:
a. laser power drop;
b. The laser intensity is not uniform in the marking format;
c. The computer software design center deviates from the vibrating lens physics center;
d. Can not achieve the expansion effect.
14. Laser marking machine laser output spot has flickering phenomenon:
1 Whether the cavity adjustment is accurate;
2 Whether the diaphragm holder is fixed firmly;
3 Is there a problem with fixing the concentrating cavity;
4 YAG crystal is fixed tightly.
15. Laser marking machine PROLASE software calls for attention when calling PLT files:
Pay attention to the printer settings when converting 1 dwg files to plt files;
2 The size of the graphic after the call should be adjusted from the new one;
3 Zoom in and out to use a fixed ratio to avoid distortion of the design graphics.