HP Designjet 4520 Printer series - Manual (Page 135)

13 How do I... (paper advance calibration
topics)
Your printer was calibrated at the factory to ensure that it advances the paper accurately when using
supported paper types in normal environmental conditions. However, you may find it useful to recalibrate
in certain circumstances:
● Unsupported paper: different paper manufacturers provide papers with a wide range of properties
such as paper thickness or stiffness, which may benefit from calibration. You can expect the best
print quality when using HP's recommended papers (see
Supported paper types on page 200 ).
● Abnormal but stable environmental conditions: if you are printing in unusual conditions of
temperature or humidity (see
Environmental specifications on page 210 ), and those conditions
are expected to remain stable, recalibration may be worthwhile.
However, paper advance calibration assumes that you have an image quality problem and that you have
already followed the appropriate troubleshooting procedure for that problem. If you have no particular
problem, there is no need to perform the calibration.
Before performing paper advance calibration, use the Image Diagnostics Print to check that the
printheads are correctly aligned (see
Print the Image Diagnostics Print on page 118 ).
NOTE: In theory, paper advance calibration should improve print quality. However, if you find the
calibration print difficult to interpret, you may choose the wrong paper advance setting and thus degrade
print quality. In this case, you can restore the original factory settings by selecting the
or icon at
the front panel, and then Paper advance calibration > Optim. for drawings/text or Optimize for
images > Select Pattern > Factory Default.
● Overview of the calibration process
● The calibration process in detail
● After calibration
Overview of the calibration process
1. Use the front panel to print a colored pattern stored in the printer seven times, each time with a
different paper advance setting.
2. Decide which pattern has been printed most successfully.
3. Use the front panel to tell the printer which pattern was best—and therefore which paper advance
setting to use in future.
NOTE: There are separate paper advance settings for each paper type name in the front panel: each
must be calibrated separately. When you calibrate a particular paper type, the settings for all other paper
types are unaffected.
ENWW Overview of the calibration process 125
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