HP designjet l65500 Manuale

Automatic printhead alignment may fail occasionally. In some cases, you may see the front panel error
message "Automatic Printhead Alignment is cancelled because of scanning errors". In other cases,
there is no error message but the print quality is not satisfactory. Here are some possible explanations.

●

There is some problem with substrate advance (see 

). After fixing any substrate-advance issue, retry automatic printhead alignment.

●

You are using a highly-textured (some banners), non-white or very reflective (some satinated
offset) substrate. Please use manual printhead alignment in these cases.

●

The substrate is wrinkled. Check that the substrate is correctly loaded with uniform tension. If
necessary, try adjusting substrate parameters such as tension or drying and curing temperatures.

●

The substrate is not wide enough. Repeat the alignment process using a substrate roll at least 24
inches (610 mm) wide.

●

The printer window was open during the printhead alignment process.

●

The printheads are not clean. See 

If the problem persists, please try using manual printhead alignment, or call your service representative
(see 

The printer offers a printhead alignment diagnostic plot, to assess the quality of the current printhead
alignment. To print it, start the HP Internal Print Server and select Printer > Printhead alignment >
Diagnostics plot.

The colored crosses on the left side of the plot should show the lines well aligned with each other.

The vertical lines to left of center should be straight, without kinks.

Of the four vertical lines at the top right of the plot, the leftmost two should be straight, without kinks.

Accurate substrate advance is important to print quality because it is part of controlling the proper
placement of dots on the substrate. If the substrate is not advanced the proper distance between
printhead passes, light or dark bands appear on the print, and there may be an increase in graininess.

The printer has a substrate-advance sensor and is calibrated to advance correctly with all the substrates
appearing in the front panel. When you select the type of loaded substrate, the printer adjusts the rate
at which to advance the substrate while printing. However, if you are using a custom substrate or not
satisfied with the default calibration of your substrate, you may wish to change the substrate-advance
compensation. See 

 for steps to determine whether

substrate-advance compensation will solve your issue.

ENWW

Substrate-advance compensation

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