Solutions for Poor Ink Ejection in UV Flatbed Printer Printheads
Symptoms and Solutions for Poor Ink Ejection in UV Flatbed Printers
Common symptoms of poor ink ejection in UV flatbed printers include ink spattering, dripping, and stringing. There are generally 8 main causes of such issues. Depending on the design differences among various manufacturers, the number of possible causes may vary from 6 to 10. However, understanding and addressing the following 8 causes can resolve 99% of poor ink ejection problems.
1. Incorrect Printhead Height
Solution:
Different printhead models in UV flatbed printers have varying ejection power, and each requires a specific optimal print height. Only within the proper height range can good printing results be ensured. If the printhead is set too high, ink spattering or misting may occur; if too low, the printhead is at risk of being scratched.
2. Printhead Clogging or Misfiring (Deflected Spray)
Solution:
Pause the machine and clean the printhead thoroughly using cleaning fluid. If the deflected spray is severe and cannot be resolved through cleaning, the printhead may need to be replaced.
3. Heating Temperature Not Reaching Set Point
Solution:
This is especially common in colder weather. The UV printhead requires the heating system to reach a certain temperature for proper ink ejection. Check if the heating pad or other heating devices have reached the required temperature.
4. Abnormal Printhead Voltage
Solution:
Inspect the printhead voltage board of the UV flatbed printer. If it is faulty, replace it with a new one.
5. Loose PCIE Card
Solution:
If the PCIE card inside the printer is loose, simply reinsert it securely into the slot.
6. Expired or Sedimented Ink
Solution:
Check the expiration date on the ink bottle label. Shake the bottle—if it doesn’t sound like liquid sloshing, the ink may have thickened or solidified. In such cases, replace it with fresh UV ink.
7. Aged Flat Cable (Ribbon Cable)
Solution:
Replace the old flat cable with a new one to ensure stable communication and performance.
8. Printhead Control Board Failure
Solution:
If the printhead control board is faulty, contact the original equipment manufacturer to request a replacement board for installation.