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D.
Color Calibration
To activate the Color calibration select
(NJ850: Both Vert Calib Test and Horiz. Calib. Test.)
followed by seven vertical patterns will print. The color calibration pattern should
be performed whenever a cartridge is removed from the carriage for cleaning or
replacement. Choose the best value under each aligning set of colors, i.e. yellow
to magenta, then magenta to cyan, then cyan to black. Enter the most correct
value for each of the 14 fields. Note: stalls 1 through 4 correspond to the Left 4
cartridges.
E.
Deadband Check
To activate the Deadband calibration select
Calibration Menu - Deadband.
color ranges. This is a final check of printer calibrations to ensure alignment has
been achieved. Ensure the vertical lines are straight with respect to each color, if
severely out of alignment, as in this example, then a re-calibration of the printer is
necessary or cleaning of the encoder strip is necessary. Note: The pattern does
not have to be perfect, just close to maintaining vertical alignments.
F.
Controlling Image Skew (not media skew as this is mechanical).
The
NovaJet 750/800
series of printers are designed with self-aligning pinch rollers. The
alignment process takes place when media is advancing forward, but not backwards.
Loading media is critical to the media alignment and reducing skew.
media is loaded at a slight skew and will take several feet of advancing media to get it
aligned properly. This can be improved by following the steps below.
1. Load the media and align the rear media guides.
Utility Menu - Color Calib. Menu – Calib Test
Utility Menu - Service Menu -
The deadband pattern will print very quickly in all
NJ750 Training Guide
Seven horizontal patterns
Many times the
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