Common faults and treatment methods of high resolution UV inkjet printers

The high-resolution UV inkjet printer is a piezoelectric inkjet printer, which uses the vibration of a piezoelectric crystal to generate ink droplets. A piezoelectric plate is installed on one side of the ink cavity of the inkjet printer. When the current passes through the piezoelectric plate, the piezoelectric The plate is slightly deformed. As a result of this deformation, the volume of the ink chamber is reduced, and the ink is squeezed to squeeze out a small amount of ink from the nozzle hole and form ink drops. Because the diameter of the nozzle hole is very small, the failure of the high-resolution UV inkjet printer mainly occurs on the nozzle. The common failures and treatment methods of the high-resolution UV inkjet printer are as follows. 1. The ink cannot be printed and the printed fonts are incomplete. There are two reasons for this kind of problem: the print head driver fails or the ink path is blocked. a. Print head drive failure: check the print head drive part of the circuit to see if the print head drive board power supply is normal, whether the drive board is working, and whether the main controller sends the signal to the drive board correctly. b. Ink circuit blockage failure: check whether the pipe joint is loose and cause poor contact and ink leakage; whether the filter is clogged, and clean it; squeeze the ink to see if the positive pressure is normal, if it is not normal, check the valve; The ink tube has been corroded or clogged. This problem may occur if you use unusable ink and cleaning fluid; if the nozzle is damaged, you need to replace the nozzle. 2. There are scattered spots around the printed content. The reasons for such problems include: the nozzle is slightly blocked, the safety ground is not connected, the nozzle is aging or the printing distance is too long, the voltage is too high or the transmission belt is not flat. a. Because some nozzle holes are blocked but not completely blocked, the ink droplets printed by the nozzle holes are not sprayed in a straight line, so there are scattered spots around the printed content, just clean the nozzle; b. Not connected Safety ground wire, electrostatic interference will also cause scatter phenomenon; c. The nozzle is aging or the printing distance is too long, and the scatter phenomenon will also occur. Try to shorten the printing distance; d. The voltage is too high or the transmission belt is not flat, due to If the nozzle voltage is too high and the printing force is too large, the ink will have scattered dots when printing on harder materials. It is recommended to lower the voltage. If the product is not transported smoothly on the conveyor belt, the printing is prone to scattered dots, and the transmission can be replaced. band. 3. The printing font is fuzzy and unclear. The reasons for this kind of problem are: the nozzle is blocked, the printing distance is too far, the safety ground wire is not connected or the main board is faulty. If the nozzle is blocked, the printing distance is too far, and the safety ground wire is not connected, the factors have been eliminated. Generally, it can be concluded that the printer's main board is faulty, and you can directly contact the manufacturer.