When UV flatbed printers print certain materials, there will be burrs, chaotic spots, and blurred lines. After investigation and analysis by the technical staff, it was confirmed that it was caused by the "floating ink" of the customer equipment nozzle. It is necessary to immediately stop the production operation of the equipment, reset the origin of the equipment, and then conduct detailed troubleshooting.
Cause one: The nozzle is broken.
Solution: Plugging the nozzle will cause the nozzle to break, so that the amount of ink sprayed in a certain color is insufficient during the printing process, which is shown by burrs and blurred lines. Check the status of the print head carefully. You can check the status by printing a test strip. If clogging is found, the lines are unclear and intermittent, you need to clean the inside of the nozzle with cleaning fluid. There are many reasons for the clogging of the nozzle. Customers and friends can clean the nozzle 1-2 times. In severe cases, use alcohol After 24 hours of infiltration, wash again to eliminate hidden dangers.
Cause two: The distance between the nozzle and the medium is too high.
It may be that the nozzle is too high from the surface of the medium, so that the ink droplets cannot be sprayed on the surface of the medium in a straight line, thereby causing the phenomenon of ink floating. Of course, the printed image will have messy spots, burrs, ghosting and other phenomena. Usually when the print head is more than 8cm away from the printing material, the phenomenon of floating ink will appear, so when printing, please check the height, if it exceeds, you need to lower it.
Cause three: The voltage of the nozzle is too high.
It may be caused by high voltage. The uv flatbed printer head uses the Ricoh G5 nozzle, which has strict requirements on the operating voltage. If the voltage is unstable or the voltage is too high, it will inevitably cause the device to not operate normally. Check whether the voltage indicated by the indicator light is red and alarm. If it is found that there are circuits of other accessories on the voltage board of the nozzle, it means that it is a modified uv flatbed printer. If the lines are integrated, it will only be solved by replacing the board. If the conditions are limited, please equip the corresponding voltage stabilizer to ensure the proper voltage environment of the device.
Cause four: The reason for the electronic control system.
There are also very rare cases of problems with the UV flat panel electrical control system. The electrical control system controls the impulse firing interval unreasonably. During the operation of the device, the pulse interferes with the flight trajectory of the ink droplet, resulting in unsatisfactory picture effects. The impulse spacing of the nozzle controlled by the electronic control system is unreasonable. This manufacturer's design of the hardware structure is not standardized, and the manufacturer needs to send technical personnel to solve it.
There are two reasons for the pattern cross-color in UV flatbed printers. One is the nozzle spray diagonally, and the other is the circuit board card problem.
First of all, let's talk about the solution of the nozzle spray. If the spray head is obliquely sprayed, it may be blocked internally. It is necessary to clean the inside of the spray head to ensure the smoothness of the internal passage. If the spray nozzle is still clogged obliquely after cleaning, you should consider replacing the spray nozzle. At present, most of the nozzles used in UV flatbed machines on the market are fifth-generation oil nozzles, non-aqueous and other nozzles. When replacing the nozzles, it is best to find the original manufacturer to buy, because their nozzles are the most suitable for the printer, and they are all original imported.
Secondly, there is a problem with the circuit board card. Because the phenomenon of oblique spraying of circuit board cards is mainly concentrated on the modified universal flatbed printers, self-developed flatbed printers are not common. Because the modified printer is a circuit board that uses photo machines, printers and other equipment, in order to realize the UV printing process, the manufacturer will place a lot of things on the original circuit board card, causing the UV tablet machine to be extremely unstable and causing problems Unusually, it is recommended that users directly contact the manufacturer to solve this situation. This shows that when we buy a universal flatbed printer, it is best to find a regular manufacturer and buy a machine that they independently research and develop, so that the relative product technology is much more mature.
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