V flatbed printers are devices that are frequently used, and improper operation during use can easily cause machine malfunctions. Our company is a professional manufacturer of UV flatbed printers, with years of experience in equipment research and development and production. Here are some common faults and maintenance methods summarized.
1. There is flying ink on the printed output sample of the universal printer
Reason: Static electricity generated by different media; The ion fan is turned off.
Repair method: Apply the ion fan to the medium for a few seconds to suppress static electricity generation; Keep the ion fan on continuously.
2. The nozzle of the universal printer is not clear
Reason: There is air inside the nozzle tube; There is no ink in the secondary ink cartridge; Too high negative pressure; The data cable is not properly connected to the control board; Poor nozzle control board; Poor power board; There is an issue with the amplitude setting; Poor nozzle.
Repair method: Use a long tube to suck out ink, and then use a syringe to remove air; Check if there are any issues with the secondary ink cartridge and liquid level sensor; Reconnect the data cable correctly; Replace the nozzle control board; Replace the power board; Check the amplitude settings and confirm that all channels displayed on the screen are correct; More? Replace the nozzle with a new one.
3. Some nozzles of the universal printer do not print ink
Reason: The nozzle of the nozzle is dirty; There is air inside the nozzle tube; Defective nozzles; Too much negative pressure.
Repair method: Use an automatic cleaning system to clean the nozzle; Suck out the ink with a long tube and remove the air with a syringe; Replace the nozzle; Re calibrate the negative pressure.
4. Failure to achieve the correct negative pressure
Reason: The universal printer ink protection box (secondary ink cartridge) is filled with ink; The negative pressure ink cartridge is filled with ink; Poor pressure gauge; There are holes on the ink tube; Poor air conditioner.
Repair method: Remove the ink from the ink protection box; Remove the ink from the negative pressure box; Replace the pressure gauge; Check all ink tubes for holes; Replace the air conditioner.
5. The UV lamp is not turned on
Reason: Poor UV lamp; UV lamp switch malfunction; The time between turning on and off the UV lamp is too short; The power cord is not properly connected.
Repair method: Replace the UV lamp; Check if the UV lamp is faulty; After turning off the UV lamp, there will be a waiting time of 3-5 minutes before turning it on again; This is circuit protection; Check that all power cords and UV systems of the printer are connected properly.
6. The shutter configuration of the universal printer cannot be opened and closed normally
Reason: Poor nozzle control board; The shutter switch is not activated on the computer; Poor shutter configuration
Repair method: Replace the nozzle control board; Check the settings on the computer; Confirm that the UV lamp control has been activated; Replace the shutter configuration.
7. Ink supply control board beeps
Reason: There is not enough ink in the primary ink cartridge.
Repair method: Check the first level ink cartridge and inject enough ink.
8. Universal printer water tank beeps
Reason: The nozzle heating system does not have sufficient water circulation.
Repair method: Fill the water tank with water.
9. The nozzle (car) encountered the medium during the printing process
Reason: The distance between the nozzle (car) and the medium is too close; The vacuum pump is turned off; The vacuum tube setting does not match the medium.
Repair method: Adjust the distance between the printer nozzle box (trolley) and the medium to 1.0-2.0mm; Turn on the vacuum pump switch; Adjust the vacuum tube to 25%, 50%, 75%&100% for each medium.
10. During operation, the nozzle (trolley) suddenly stops
Reason: The grating ruler is dirty; A certain part of the grating ruler is severely scratched; Poor grating ruler; Poor grating encoder; The grating encoder is not installed correctly.
Repair method: Clean the grating ruler with alcohol; Replace the printer grating ruler; Replace defective grating ruler and grating encoder; Rearrange the grating encoder.
11. The universal printer nozzle (car) cannot move
Reason: The machine is offline; The servo motor of the nozzle (car) is offline.
Repair method: Press the green switch to connect the computer and printer; Turn off the machine, restart and reset the motor after 10 seconds.
12. The automatic cleaning function of the universal printer does not work
Reason: Poor ink scraping control board; Software malfunction.
Repair method: Replace the defective ink scraping control board; Reinstall the print driver.
13. The universal printer did not spray white ink
Reason: In the option label dialog box on the computer, the white ink is set to the "none" position; Air appears inside the nozzle tube; The white ink circulation switch was not used before printing.
Repair method: Check if the white ink setting in the option label dialog box on the computer is correct; Remove air through a long tube syringe; Before printing, turn on the white ink circulation switch 5-10 hours to circulate the white ink in the first and second level ink cartridges.
14. The ink is not dry
Reason: Incorrect setting of UV lamp mode; The brightness of the UV lamp is insufficient; UV lamp damaged; The shutter light is not turned on.
Repair method: Check the UV lamp mode settings; Press the "high" button to increase the brightness of the UV lamp; Replace the damaged UV lamp; Check the shutter light to ensure that it is working correctly.
15. The universal printer shows white spots during printing
Reason: Incorrect nozzle arrangement; The print driver has not been updated; The parameters in the color parameter dialog box are incorrect.
Repair method: Accurately rearrange the nozzles; Install a new print driver; Check the color parameter dialog box to ensure correct settings.
16. The nozzle control board is out of power
Reason: Poor nozzle control board; There is no power on the J18 connector.
Repair method: Replace the nozzle control board; Check the power supply of+41V and+24V; Ensure normal power supply.
Whether using a flatbed printer or other types of machines, careful maintenance is necessary during use to avoid unnecessary malfunctions that may affect work. The above provides a detailed summary of common faults and repair methods for UV flatbed printers. If you have any questions, please feel free to call us for consultation.
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