When you are shopping for a new UV flatbed printer, there are some basic questions you should ask about its printheads, here are some small questions I have compiled.
1. How many nozzles does each print head have?
This can help you understand the speed or speed of your printer.
2. What is the total number of nozzles of the printer?
The nozzles have a single-color nozzle that can only spray one color, and a multi-color nozzle that can spray multiple colors.
Taking the Ricoh G5i nozzle as an example, it is the first mode among domestic manufacturers, and the nozzle ink holes are used to the maximum, so the relief effect will be better, the printing accuracy will be higher, and the printing speed will be faster. It can be configured with 3-8 grayscale piezoelectric print heads for high-precision high-speed printing of 4/6/8 colors, and the printing speed is 15m² per hour.
3. Is there any special white ink or varnish nozzle? Are they the same model as the CMYK printheads?
Some printers have a “white drop size benefit” only with white ink, since using larger nozzles makes white ink better.
4. If the piezoelectric head fails, who is responsible for paying for the replacement head? What are the common causes of printhead failures? What causes of failure are covered by the warranty? What causes of printhead failure are not covered under warranty? Is there a limit to the number of printhead failures covered per unit time?
If the failure is caused by user error, most manufacturers will require the user to pay for the replacement of the printhead. Most failures are indeed user error, the common cause being a head impact.
5. What is the printing height of the nozzle? Is it possible to avoid nozzle impact?
Bumping is a common cause of premature printhead failure (improper media loading, which can cause buckling, media rubbing against the fragile nozzle plate, or not properly passing through the printer). A single head strike can damage only a few nozzles, or it can damage the entire nozzle. Another reason is constant flushing, which can damage the nozzle system.
6. How many print heads are there for each color?
This will tell more about how slow or how fast your printer is jetting ink.
7. How many picoliters are the ink droplets of the nozzle? Is there variable droplet capability?
The smaller the droplets, the better the print quality. However, the smaller droplet size reduces the speed of the printhead system. Likewise, printheads that produce larger droplet sizes do not provide the same print quality, but tend to print faster.
Post time: Mar-30-2022