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Troubleshooting 4-53
NovaJet 800 Series Service Manual
Ink System Pressure Theory
The ink system works on less than 1/10 psi pressure. The reservoir caps
should remain loose to allow for atmospheric pressure to push down on
the ink to provide adequate pressure on the ink. The purpose of the
cartridge priming procedure is to establish -2 to -5 inch head pressure in
the upper chamber of the cartridge. The cartridge must have between 15
and 40 ml of ink inside the cartridge for adequate printing pressure.
Proper cartridge pressure and ink level is required for long print opera-
tions.
Figure 4-55. Ghosting.
Ghosting is a phenomena of inkjet technology. Adjust pre-heat levels to
help correct. The temperature control mode on the NJ880 is the default
setting by may be changed to preheat to help offset the ghosting effects
observed.