What are the common faults and treatment methods of laser cutting machine?

What are the common faults and treatment methods of laser cutting machine?

In the use of laser cutting machine, problems often occur because of long continuous use, dusty working environment and low quality of operators. How to deal with some common problems?

First, there is no programming during normal startup:

Failure performance:

The main power switch indicator light is not on, and the motherboard indicator light is not on.

Cause of failure:

Solution | Poor contact of main power supply, damage of DC power supply, failure of control panel, failure of motor driver and mechanical failure. The operator can solve it step by step.

specific inspection methods:

1. Observe the indicator light on the visual inspection machine, observe the fault position, check whether the indicator light of the main power switch is not on, check whether the 22V input power supply is in poor contact or whether the power supply fuse is blown, the LED light of the motherboard is not on or the control panel is not displayed, check whether the DC 5V and 3.3V power supplies are normal, the motor driver indicator light is not on, check whether the output of the 36V power supply is normal, and pay attention to checking whether the power supply is normal.

2. Check that all the displays are normal. If you can hear obvious buzzing, it must be a mechanical failure. Is it

smooth to push the trolley and the cross beam by hand, and is there any obstruction? See if there's anything else in the way.

3. Check whether the motor shaft is separated and whether the synchronous wheel is loose.

4. Check whether the wires or plugs connected to the driving block (device) on the motherboard, power supply and plug are in good contact.

5. Check whether the wire connector from the drive block (actuator) to the motor is disconnected. The 18-core wire from the motherboard to the small board is damaged. Is there any * * * to go to the scene?

6. Check whether the argument setting is correct. The argument on the left side is the same, but the difference should be corrected and written into the machine.

2. There is no display on the panel and the buttons can't be started:

Failure phenomenon:

It is most likely that there is no display on the startup panel, and the buttons are out of order or have no action.

Cause of failure:

It shows that the power supply of the control block is abnormal, the control wiring is in poor contact, and the panel is faulty.

Specific inspection method:

1. Restart the machine to see if the crossbeam and trolley reset normally, and if there is no action, treat it as a failure of no action when starting the machine.

2. press the power-on reset button, and press the direction key and function key on the machine panel to see if it is normal, if the button can automatically reset, and if there is any difference.

3. Check whether the sockets and connectors in the connection display control are loose and have no contact.

4. Replace the display control block to check whether there is display, whether the indicator light on the control block is on and whether the power supply is normal.

5. Replace the data cable.

6.1.3 the motherboard measures whether P5 has power and the voltage is 5V. If it is abnormal, check the output of 5V power supply. If there is no output, switch to 5V power supply.

7. If there is a display, the key is inactive. Replace a key film to see if it is normal.

8. if it still doesn't work, just change a motherboard to test it.

thirdly, continuous light emission, intermittent light emission, and unstable or uncontrolled current: (This problem will also occur on leather laser cutting machines)

Failure phenomena:

All of them are abnormal light emission. On the high voltage side, the ammeter is connected in series, which shows that the ammeter shows abnormality, or there is current for a long time, or sometimes it is not controlled.

Cause of failure:

The main reasons are incorrect selection of laser type, failure of laser power supply, damage of motherboard, wiring board, or failure of control line connection and cooling water recirculation system.

Main inspection and troubleshooting methods:

1. In parameter setting, whether the laser type is correct or not is the main cause of continuous light-emitting failure.

2. Pull the nine-core control line to see if there is any loose control line. The connection is unreliable.

3. Remove the control line (DB nine-core line) from the power supply, and use the point-and-shoot switch to point out the light, so as to analyze whether the power supply or the motherboard is faulty.

5. The shooting is not normal either, indicating that there is something wrong with the power supply.

6. When the power supply is normal, connect the control line, and measure the switch control pin on the terminal board with a multimeter. When it is not luminous, the normal voltage is above 4 volts and below 3 volts, and the motherboard output is abnormal; When emitting light, the voltage of this pin should be below 2 volts, and the output is abnormal when it is higher than 2.5 volts.

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9. Unplug the data control line connecting the motherboard to the laser power supply for the old model, and then turn it on. If there is still laser output, the laser power supply fails.

1. Adjust the potentiometer marked IP in the power supply to change whether the current is too high or replace the laser power supply.

11. Unplug the control line of the laser power supply, and it no longer emits light, which proves to be a motherboard failure (this failure is easy to occur when the old machine is ignited at high voltage).

4. Abnormal reset, shaking of the starting trolley or beam, and collision of the starting trolley with the wall

Fault phenomena:

Wrong starting reset direction, shaking of the trolley and beam, collision of the resetting trolley or beam with the wall; When the motor is running, you can hear the obvious humming sound.

Cause of failure:

This kind of failure, whether the connected wires are in good contact or not.

8. Turn on the machine to check which axis the jitter appears, the trolley or the cross beam, and disconnect the power supply of one axis to test the motor and driver of the other axis (the block mainly occurs after replacing the motherboard and motor driver and rewiring, which is caused by incorrect parameter setting or wiring error; Followed by mechanical, sensor, motor driver and driver wiring loose fault.

Troubleshooting:

1. If the reset is abnormal after replacing the motherboard or drive, first check whether the argument setting is correct, and the problem of abnormal reset can be solved by changing the motherboard argument.

2. Turn off the machine and push the trolley and cross beam by hand to see if there is resistance. If there is any obstruction, check whether the left tensioner is tight.

3. Check whether the synchronous belt, bald head, blowing pipe and towing chain are stuck. Check whether the beam is seriously deviated, and the left and right sides should not be more than 2MM. Check whether the bearing wheels on both sides are damaged

4. See that the dust on the guide rail is not too much to hinder the trolley, and clean up the dust and add lubricating oil to the slider.

5. Push the trolley to see if there is any rubbing sound or shaking. If the gap between the sliders is too large, replace the sliders.

6. Check whether the push is smooth.

7. Check whether the motor is faulty in the driver (block). Interchangeable tests to find out whether the problem lies in the motor or the driver (block).

9. For models equipped with resistance bars, measure the resistance. If the resistance is wrong, replace the resistance bar.

1. When resetting, the direction is correct, but at the end, the car or beam can't stop and hit the machine. Need to check whether the motherboard argument is wrong. The sensor wire is broken or the sensor is damaged, and whether the magnet is in a reasonable position.

when ym model does not reset, pay attention to whether the 18-core data cable has poor contact or open circuit, and plug or replace the data cable again.

13. If the problem still exists, it may be that the motherboard is faulty. Replace the motherboard.

11. Is there too much dust on the sensor (photoelectric sensor)? Common faults and treatment methods of Wei Tuo laser cutting machine

The laser cutting machine should pay attention to maintenance during use. When there is a problem, master the following maintenance methods, and the disease will be cured at hand.

1. There is no response when starting the machine

Is the power fuse burnt out? Replace the fuse.

is the power input normal: check the power input and make it normal.

is the main power switch damaged: replace the main power switch.

2. No laser output or weak laser

Is the optical path offset: adjust the optical path carefully.

whether the reflector is contaminated or damaged: clean or replace the reflector.

does the focus of the device change: readjust the focus.

whether the focusing lens is polluted: clean the focusing lens.

whether the cooling water quality or water temperature is normal: replace the clean cooling water to make its temperature normal.

whether the cooling water circulates in a circle: dredge the cooling water channel.

whether the laser tube is damaged or aging: replace the laser tube.

whether the laser power supply is energized: check the power supply loop of the laser power supply to make it normal.

Is the temperature of the whole machine too high: 1. Turn it off to let the temperature drop; 2. Ventilation strengthens the heat dissipation of the machine; 3. Adjust the ambient temperature.

is the laser power supply damaged? Replace the laser power supply.

3. The cutting/engraving depth is not ideal

Whether the cutting/engraving processing parameters are normal: set appropriate processing parameters.

whether the laser power setting is normal: set the laser power correctly.

the laser output becomes weak: see point 2.

4. The computer and the device are not online

Is the scanning switch on? Turn on the scanning switch.

whether the motion system is powered on: check the power supply of the motion system and make it normal.

is the DSP motion control card damaged? Replace the DSP motion control card.

whether the signal cable is loose: plug the signal cable again and fix it.

5. There are errors in machining dimensions or actions.

Whether the grounding of the whole machine and the computer is normal: ground the device and the computer well.

whether the signal line is normal: replace the signal line.

computer operating system is faulty or infected with virus: reinstall the operating system or prevent virus.

is the computer running normally: replace or handle the computer.

unstable power supply or interference signal: install voltage stabilizer or eliminate interference signal.

Is the application software normal? Reinstall the software and the driver software of the motion control card.

are the processing parameters set correctly (such as layout, etc.): reset the corresponding parameters

is the processing program written normally? Check the written processing program and modify it until it is normal.

6. The slider movement is not ideal

Are the trolley slideway and slider polluted? Clean the slideway and slider.

is the guide rail polluted: clean the guide rail and add lubricating oil.

whether the drive gear is loose: fasten the drive gear

whether the drive belt is loose: adjust the belt tightness. What brands of laser cutters do you have?

Your question is not targeted enough. Different kinds of laser cutting machines should be selected for different materials. Not to mention foreign countries, there are thousands of domestic laser cutting machine brands alone. If enterprises want to survive, they must have their own housekeeping skills. So you need to tell your specific needs: cutting materials, cutting thickness, cutting width and precision process requirements. Objective What is the difference between co2 laser cutting machine and yag laser cutting machine?

YAG laser cutting machine

Advantages: YAG solid laser has short output wavelength and high coupling with metal, which is beneficial to be absorbed by metal surface; carbon steel and stainless steel, including highly reflective nonferrous metals such as copper and aluminum, have good light absorption; moreover, YAG laser is small in size, small in equipment occupation, low in energy consumption and low in investment cost, and is suitable for small and medium-sized enterprises.

Disadvantages: the conversion efficiency of YAG solid-state laser is low, only 1-3%; There is an internal temperature gradient in the working process of YAG laser rod, which will cause thermal stress and thermal lens effect, which limits the further improvement of average power and beam quality of YAG laser. The output power per watt of YAG laser is more expensive than that of CO2 laser and fiber laser.

CO2 laser cutting machine

Advantages: Because the input laser wavelength of CO2 laser is 1.6 microns, the wavelength is long, the coupling with nonmetallic materials is high, and it is easy to be absorbed by nonmetallic surface, so the medium and small power CO2 laser is mainly used in nonmetallic material processing industry, while the high power CO2 laser is mainly used in metal material processing industry.

CO2 is widely used, while yag is seldom used. The process is relatively less mature than CO2. What are the common faults of Germany's 3, kW CNC CO2 laser cutting machine? How to repair it?

Common faults of laser engraving machine and their solutions

1. The laser head does not emit light

1. Press the test key on the operation panel to check the status of the ammeter:

1. No current: check whether the laser power supply is turned on, whether the high-voltage line is loose or off, and whether the signal line is loose;

② There is current: check whether the lens is broken and the optical path is seriously deviated;

2. Check whether the water recirculation system is normal:

① No water supply: Check whether the water pump is damaged or not energized

② Water supply: Check whether the water inlet and outlet are reversed or the water pipe is broken;

3. It can shoot some shots, perform self-inspection, and transmit data without emitting light (check whether the computer settings are correct)

2. Carving is different in depth or not

1. Check whether the water flow in the water circulation system is smooth (the water pipe is bent or broken);

2. Check whether the focal length is normal (re-calibration);

3. Check whether the light path is normal (recalibrate);

4. Check whether the paper on the plate is too thick and the water is too much (re-correct);

5. Check whether the beams are parallel (adjust the belts on both sides);

6. Check whether the lens is broken (replaced);

7. Check whether the lens or the emitting end of the laser tube is contaminated (re-cleaning);

8. Check whether the water temperature is higher than 3℃ (replace the circulating water);

9. Check whether the laser head or focusing lens is loose (tightened);

1. The laser current intensity must reach 8mA；;

11. Laser tube aging (replacement: no charge during warranty period);

3. Abnormal reset

1. Check whether the sensor is stained with dust, poor contact or damaged (wipe off the dust on the sensor or replace it);

2. Check whether the data line of the flexible conductive tape is in poor contact or damaged (trim the data line, plug it in again or replace it);

3. Check whether the ground contact is reliable or whether the high-voltage line is damaged (re-ground or replace the high-voltage line);

4. The motor wire is in poor contact.

4. Missing engraving

1. Incorrect initialization, data has been transmitted (corrected);

2. The operation sequence is reversed (re-output);

3. Electrostatic interference (check whether the ground wire falls off);

5. The cleaning hook edge is misaligned and not closed

1. Whether the edited file is correct (re-edited);

2. Whether the selected target exceeds the layout (reselect);

3. Check whether the software argument settings are correct (reset);

4. There is something wrong with the computer system (reinstall the operating system and software);

5. Check whether the tightness of the left and right belts is consistent or whether the rear belt is.