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Common problems and solutions for laser cutting

Laser cutting can be said to be the most common field of fiber laser applications. As a mechanical device, as the use of time continues to accumulate, the problems on the device will naturally become more and more, so let's simply let us Understand the common problems and solutions of laser cutting, you can help people understand the problems and solutions when the laser cutting machine encounters problems.

1. Is the cutting effect not good or not worn?

The power setting is too small, the potentiometer is small, the light is polarized, the lens is dirty, the focusing lens is reversed, the focal length, the laser power supply, the laser tube power attenuation, the water temperature is too high, the voltage is unstable, etc., according to the actual situation, it is as simple as possible.

2. Can't connect to the device?

Whether to install the board driver, whether the USB cable or network cable is plugged in, the USB cable or network cable is bad, the adapter board is bad, and the board is installed.

3. Boot back to the original point to move in the opposite direction?

The origin switch is broken.

4. Cutting pattern deformation and cutting overlap?

The synchronous wheel screw is loose, the motor wire is broken, the motor is broken, the drive, voltage, etc.

5. The device can't be started and the boot room will be tripped when it is open.

Whether the emergency stop is bounced, whether the external circuit is connected, whether the internal air-opening of the device is closed, whether it is turned on or not, please check the main contactor and control transformer, etc.; if the water protection leaks, the laser power supply is short-circuited by water ( For example, the JGHY12570 water protection position is installed on the side, it is just the laser power supply underneath, the 107 water pump is short-circuited, and the indoor air is used too small.

6. High-voltage line fire?

This problem is really a headache. I suggest putting a high-voltage insulation sleeve on the outside of the high-voltage line.

7. Is the graphic size too large or too small?

Whether the output graphic size is the same, the Z-axis height position changes, the correction file, and the like.

8 The color of the image is different from the surrounding color?

Adjust the focus factor, adjust the W-axis focus, etc.

9. During the marking process, there is a bad phenomenon and the spot becomes thicker?

Dynamic, DA board, etc.

10. Marking the image position offset?

The X-axis or Y-axis position of the vibration lens is offset, and the center point is found to adjust the XY axis position according to the actual offset direction.

11. Start the vibration lens XY axis chaos and dynamic motor abnormal noise swing?

Replace the ±12±15V switching power supply; replace the ±12±28V switching power supply.

12. No light?

Whether the chiller return water is normal, whether the W-axis position changes, whether the DC48V32A laser power supply is normal, the laser tube, etc.

13. The boot display panel has no display?

Whether the 5V12V24V switching power supply is normal, the display panel, etc.

14. Booting does not return to the origin display panel failure?

Replace the offline card.

15.Z axis does not feed or exercise is weak?

Z-axis feed motor problems, drive problems, bearings, foreign objects stuck, etc.

16. Does the glass tube not emit light?

The light control of the glass tube mainly includes a laser tube, a laser power source, a water circulation system and an light output signal, and the light output signal includes a PWM light output signal given by the board, a water protection signal, a door switch signal, and the like. Therefore, the laser tube does not emit light mainly from the laser tube laser power water circulation system and the light output signal. Generally, firstly, whether the laser power supply is normally energized, whether the outer tube of the laser tube is abnormal, whether the water circulation system is normal, if not normal Make the appropriate replacement or adjustment.

In the normal situation of the above aspects, the optical signal problem should be considered. Generally, the short-circuit signal (short-circuit laser power supply current 5v and AIN short-circuit water protection P and GND with lock-free switch control L and GND) is used. Test laser tubes and laser power supplies. If this method can emit light normally, it means that the laser tube laser power supply has no fault, and it is a signal problem of water protection switch, relay, door switch, board pwm signal, etc., and can be eliminated in order. If this method does not emit light, it is a problem of laser tube or laser power supply, and it can be solved by the replacement method in case of bad judgment.

17. Does the RF laser tube emit light?

In the case that the waterway unobstructed laser power supply is normally started, it is first tested whether the laser power supply DC 48v is normal; the conduction of the 4 pin and the 13 pin of the 25-pin plug of the laser tube can be turned on to indicate that the water protection signal is normal, and the water protection cannot be turned on; The voltage conditions of the 7-pin and 20-pin are not pre-adjusted or the DC voltage is about 4 to 5V at the beginning, and the normal signal (low-level conduction) is pre-adjusted or started at around 1 to 3v. If the water, power supply and these two signals are normal, it can be judged that the laser tube is faulty. If the signal is not normal, it indicates a board problem or a circuit problem.

18. After the replacement of the RF laser tube, the laser tube connection error is displayed?

In the connector (internal line is not desoldered short circuit), the power line (left and right negative and negative poles are connected with the ground wire), the water connection is normal. After restarting the chiller and the device, the 25-pin connector is generally not connected. The problem of connecting the board is broken or incompatible with the board such as the encrypted tube and the unencrypted tube.

19. Cutting machine cutting misplaced?

Cut weight or collinear pattern cut distance is too large) "1.) Feed cutting misalignment First, the step distance of the feed shaft = measured length * original step / real length (set feed length) Second, check the feed axis Synchronous belt locking wheel and motor synchronous belt locking wheel is loose. Third, there is relative sliding between the rolling net and the feeding shaft to see if there is a jam. 2.) Unfeeding cutting misalignment is a cart motor or light The shaft synchronization wheel is loose. The second step is lost. The lost step may be the machining speed. The idle speed or the acceleration setting may be too large. The motor may be in poor contact with the motor. The current may be too small. The driver may be bad or the motor may be bad. There are fewer lost steps.

20. Feeder feed?

The feed length of the feeder is generally the photoelectric switch is bad or the light sensitivity of the photoelectric switch is not adjustable. The sensitivity of the photoelectric switch of the feeder is adjustable. When the upper and lower switches are connected at the same time, the feeder starts to work when the light sensitivity is too high. When sensitive, even if there is blocking material, it will be inductive, so it will be long. At this time, adjust the sensitivity adjustment knob of the photoelectric switch wiring to adjust the light of the photoelectric switch when the material is blocked.

laser cutting

21. Is the galvanometer machine too thick?

The light intensity is not enough. The light path of the basic light path and the over-expanded beam is well adjusted. When the dynamic focus is well adjusted, the spot is still relatively thick. It is necessary to adjust the distance between the two lenses of the beam expander. For the three-fold beam expander commonly used by our company, the beam is generally adjusted to expand. The mirror spot diameter is better at 13-14mm and can be adjusted according to the customer's processing requirements.

22. The galvanometer machine is self-excited?

Dynamic howling is for Shanghai dynamics. When adjusting R103R28 to adjust the self-excitation and howling adjustment is invalid, it is necessary to measure whether the motor shaft is short-circuited with the casing. When measuring, disconnect the power line of the motor, otherwise it is long-conducting. If the line measurement is still on, the motor and the case should be well insulated with insulating film, and then the R103R28 can be adjusted and the adjustment can be performed.

23. Is the marking machine and cutting machine marked or cut in the wrong size?

For the dynamic marking machine, when the vibration lens is not moving up and down, the size is wrong. Generally, the correction parameter data is changed or the error is corrected. The parameter correction of the galvanometer can be solved. The cutting size of the cutting machine is generally not the step size and the number of pulses of the driver. The general determination of the number of pulses caused by errors can be solved by calculating the step size.

metal cutting

24. Is the cutting machine turned back to the origin direction?

Such faults are generally caused by the failure of the origin switch. The origin switch has a proximity switch and a mutual switch (magneto-switch). The two homing directions are generally reversed by the short-circuit of the switch.

25. Power supply DC switching power supply failure of cutting machine motor, motor driver, motor line and driver?

The specific manifestations of such faults on the equipment are generally:

(1) The laser head does not move;

(2) The abnormal operation of the laser head during operation is caused by stagnation and jitter. Generally, such a situation is first observed. Whether the DC switching power supply of 48v or 42v is working properly. The power supply voltage is insufficient or unstable. If the switching power supply works normally, It is necessary to consider whether the motor is faulty for the drive motor or the motor line. First, the motor should first observe whether the rotation of the motor itself is smooth when the motor line is disconnected from the drive. If the motor rotates differently, it can be directly judged as the motor failure. If the motor itself is running normally, measure the motor coil. For a six-wire motor, AC, A+, and A- are a group of coils ac and a+a- respectively turn on bcb+b- as a group of coils, which are turned on. If the situation is the same as above, the motor fault can be directly judged. For the stepping driver of Baishan and YAKO, if the DC power supply is normal and the motor line is disconnected, if the indicator light of the driver is not bright, the driver is directly judged to be faulty. , can not be directly judged can be tested by the replacement method; in such failures, the motor line failure is a small probability of failure, in the motor and drive The case is to be considered are excluded motor line, detecting whether there is a short circuit and open-circuit, the multimeter detailed investigation of the measurements can be off.

26. Does the laser tube not emit light?

1) The water level switch is broken;

2) The high voltage line is broken;

3) The laser tube is broken or burned out;

4) The laser power supply is broken;

5) Waterless circulation (including water pipe blocking and pump not working);

6) The water protection line is broken or the contact is not good;

7) The laser power supply does not enter 220V;

8) There is no signal input from the laser power supply (the signal line is broken and the contact is not good, the relay that controls the light is broken, the board is bad, and the wire is not well welded);

9) The online two-axis card is broken.

27. Is the laser tube light weak?

1) The laser tube burns out or the laser tube lens burns out;

2) laser tube light decay;

3) A component of the laser power supply burns out;

4) The power of the laser setting is too low;

5) The power regulator is not adjusted to the maximum.

28. Cut constantly?

1) The laser tube has low light power;

2) The laser lens is dirty or damaged;

3) The laser lens is not good and loose;

4) The focal length is incorrect;

5) light deviation;

6) The power of the laser tube setting is too low;

7) The platen is not flat.

29. Can't open the machine?

1) The machine is not powered;

2) The air switch has jumped;

3) The emergency stop switch is pressed;

4) The start button is broken;

5) The 24V transformer is broken;

6) The contactor is broken;

7) line break;

8) poor line contact;

9) The 24V switching power supply is broken.

30. Machine X, Y axis can not move?

1) The 42V switching power supply is broken;

2) The board is bad;

3) There is a problem with the signal line.

31. Does the machine X or Y axis not move or not?

1) The drive is not powered;

2) The drive is broken;

3) The line contact of the driver is not good or broken;

4) The motor plug is broken or has poor contact;

5) The motor shaft is broken;

6) The drive shaft is loose or broken;

7) There is a problem with the driver signal line;

8) The slider is blocked or the drive wheel is blocked;

32 machine cutting position

1) loose belt;

2) The machine wheel screws are loose;

3) The machine driver is broken;

4) The machine is broken or the line is damaged;

5) The machine motor plug-in is bad or the contact is not good;

6) There is a problem with the motor.

32. The online machine does not detect the control card?

1) The card is broken;

2) The card is not inserted;

3) The computer plugin is broken;

4) The DPIO module driver is not installed.

34. The camera is not cut

1) Correction has no school;

2) The camera is not adjusted;

3) The template is not ready;

4) The camera camera parameters are not adjusted;

5) The parameters of the template are not adjusted, such as acquaintance ratio.

33. No light?

Shorting the L and GND as long as the light indicates that the laser power supply and the laser tube are no problem, only the signal problem; shorting P and GND is to judge whether the water protection switch is normal; shorting the AIN and 5V will grow out to indicate the laser tube laser power supply protection connection intact.

34. Can't the computer and device connect?

Updating the D13 driver may also be a USB cable.

35. When a shaft is turned on, can it be pushed by hand?

When the shaft is not moving during machining, the drive is broken, or the drive mechanism may be loose. (If the two shafts are not moving during machining, the hand can also be pushed at the time of starting, and the driver light is not bright, indicating that the 42V open power supply is broken).

36. Will it jump in one direction when cutting?

Increasing the drive current may also be a problem with the drive being broken and the motor line.

37. Is the saw toothed?

Slider problem.

38. Cutting constantly?

The laser tube may be weak; the light path may be biased; it may also be a laser power source.

39. The laser head can not be restricted by the collision machine?

The home switch is broken, or it may not be set on the panel.

40. Cutting is not sealed?

Belt adjustment and parameter settings.

41. Is the machine's cutting machine pre-adjusted with light processing?

Generally it is a control card problem.

42. The size of the cut is inconsistent?

The wheelbase and pulse are not adjusted.

43. When working, a complete curve has a small distance to jump over without cutting, also known as jumping light?

This kind of problem is generally caused by the looseness of the big car slider in the case of long-term high-speed operation. It only needs to re-adjust the sliders on both sides of the cart to solve it.

44. In the same version of the work, there are some places in the same edition that are cut and cut off in some places?

This kind of problem is generally caused by light deviation or uneven work surface, which requires dimming and adjusting the platform surface. Sometimes the light deviation is caused by the deformation of the guide rail, and it is necessary to adjust the guide rail.

45. When cutting, the two ends are sometimes cut into each other, sometimes separated?

This problem is generally caused by the loosening of the fixed wheel fixing screws or the motor line. If there is a problem with the motor line, it is best to replace all of them one by one. Do not change one or two separately.

46. Summer chiller is easy to alarm at high temperatures?

This problem is generally caused by too hot weather, poor cooling of the chiller or insufficient cooling capacity. There is no problem of insufficient cooling capacity from the refrigerating water machine. Generally, the heat sink is too dirty, and the ventilating part is good to cause an alarm. Small chillers generally have insufficient cooling capacity, and can adjust the temperature difference and increase the alarm temperature to solve the problem.

47. When the light is out, there is no light?

First, the signal temperature is unstable, including the light signal and the chiller signal, and then see if the potentiometer has poor contact, and finally check if the power supply is bad.

48. Start the car does not return to the original point, can not move?

This problem is generally that the car motor is not powered, and the laser head can be easily pushed by hand when the device is turned on. The cause of the failure is that the 48V open source power supply is broken, or self-protected. It can be turned off for ten minutes and then turned on. If it is not good, then change the 48V switching power supply.

49. After a few minutes, the light from the laser tube becomes weak.

There are generally three possibilities for this problem. The power supply has a problem, the laser tube is broken, and the frequency of the laser tube in the software is incorrect.

50. When the cart moves, it often shakes sharply?

This problem is generally caused by the servo limit line or the limit, and the line change or limit can be solved.

51. Two laser heads move around?

Generally, the board is bad and the signal given is incorrect.

52. Sometimes the customer asks that the two versions of the graphics can be docked, but can't be picked up when cut out?

The problem is that the feed drive shaft and the aluminum Aluminium of the trolley are not parallel, and the trolley cannot be adjusted. Only by adjusting the feed drive shaft to solve the problem.

53. Is the saw toothed?

The unsealed slider is loose and bad, the belt is loose, the belt synchronous wheel is eccentric, the curvature value is too large, the corner speed is fast, and the lens is not tight.

54. The laser tube power is unstable and the engraving is very good. After a few days, the carving is different.

The laser tube and power supply are unstable.

55. No light,?

The water level switch is leaking.

56. Laser power ignition?

The soldering place was not connected, no silicone was applied, and the high voltage line hit the iron.

57. Cut constantly?

The light is off, the lens is dirty, loose, the focal length is wrong, and the power of the laser tube is degraded.

58. Can the machine not open?

Emergency stop, external power supply, contactor.

59. Does the XY axis not move?

The drive is broken, the motor cable and connector are broken, the belt synchronous wheel is loose, and the 42V switching power supply is broken.

60. Does the display panel not light?

The 24V power supply is broken, and the board and display panel cable are broken.

61. Cutting effect is not good?

The surrounding yellow light is not correct when cutting, and the blowing is small.

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