print jobs that are set for low-quality and high-speed. It does not occur when the custom print-quality
setting is set to “best.”
To eliminate aeroworms, select a higher IQ print setting.
CAD Lines look misaligned, images are blurred
This issue can be seen even after the customer has performed the Printhead Alignment procedure. The
misalignment is most highlighted in CAD drawings, there are double-lines and images are ‘ghosted’.
See the two examples below.
Here the CAD drawing has the issue, the CAD lines are
misaligned and the image looks blurred/grainy
Here the CAD drawing does not have the issue and the
drawing looks ok.
This issue can be solved by updating the firmware to the latest version.
Some paper types may deform when printing high area fill
This issue is known as PEPA: Paper Expansion Paper Advance. The quality of some images might be
reduced if you use a paper type that is unsuitable for your image. This is especially important to
consider when printing on fiber-based papers such as HP Universal Coated Paper, HP Coated Paper,
HP Heavyweight Coated Paper and HP Universal Heavyweight Coated Paper. Printing images that
contain high-saturation area fills on fiber-based papers can create unwanted wavy patterns as a result
of paper expansion. This can ultimately contribute to more severe problems. Consider using Super
Heavyweight Coated Paper and other cockle-free papers when printing high-saturation area fills.
Finally, as this paper expansion is increasing when a high quantity of ink is placed at once, the HP
Designjet T7100 might exhibit this paper expansion more than when compared to the DJ5x00 or
DJ10x0 series.
Printheads fail repeatedly
If you encounter intermittent quality issues that are not solved after replacing Printheads or repeated
replacement of the same Printheads there might be a capping problem. This could be caused damage
to the Maintenance Cartridge or even the actual Carriage Assembly which is preventing the Printheads
from being correctly capped.
The Maintenance Cartridge provides the capping for all of the Printheads and contains integrated
Printhead caps, wipers, cleaners and waste ink disposal.
The following illustration shows a the components that make up the Maintenance Cartridge.
180 Chapter 7 Print quality ENWW
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