Pen settings seem to have no effect
●
You have changed the settings on the front panel by selecting the
icon followed by Printing
preferences > HP-GL/2 > Define palette, but did not select that palette in Printing preferences > HP-
GL/2 > Select palette.
●
To enable the software-driven pen settings, go to the front panel and select the
icon followed by
Printing preferences > HP-GL/2 > Select palette > Software.
The image has a wood-grain appearance (aeroworms)
Aeroworms are wavy, horizontal bands produced by air-induced dot placement error (DPE). In extreme cases,
aeroworms give the image a wood-grain appearance. The problem occurs most commonly on 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.
168 Chapter 7 Print quality ENWW
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