Adjusting Negative Pressure of the Print Heads

This machine injects inks from the print head nozzles to print on media.

Negative pressure is applied to the print heads to prevent ink from leaking from the heads while the machine is waiting for printing. The negative pressures applied to the print heads are adjusted appropriately when the machine is installed. However, it needs to be adjusted if the usage environment changes, such as different humidity, temperature, or air pressure. An inappropriate negative pressure may cause dot displacement, dot drop-out, or ink dropping, resulting in deteriorated print quality.