HP Latex 560 User Guide - Page 121

with the four black lines at the sides of the pattern. The following figure shows how this pattern will appear

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Check the continuity of the thin diagnostic lines on the alignment status plot. In one section, colored lines are printed in line with black lines to test the alignment from one color to another. In a another section, colored lines are printed such that one half is made with a forward pass and one half is made with a reverse pass to test the alignment between the two directions. In both sets of patterns, printhead misalignment will be visible as a step in the line at its center (marked with a short black line). Bear in mind that small misalignments may not cause any print-quality defects. The printing process is designed to hide the effects of small amounts of misalignment. The reference scale can be used to quantify the amount of misalignment; errors below 4/600 inch are unlikely to cause print-quality defects. The optimizer fluid is transparent and cannot usually be seen directly. The fluid can be seen on some substrates (such as self-adhesive vinyl) when printed in conjunction with the colored inks. The cross pattern that is printed above the reference scale is printed in this way and can be used to evaluate the alignment of the optimizer on some substrates. In a well-aligned system, the light-colored cross at the center of the pattern will be aligned with the four black lines at the sides of the pattern. The following figure shows how this pattern will appear on the substrates on which it is visible. This sample is slightly misaligned. If the printheads are misaligned or you feel unsure about them-for example, because a substrate crash occurred-then align the printheads. See Align the printheads on page 146. ENWW Improve print quality 115

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Check the continuity of the thin diagnostic lines on the alignment status plot. In one section, colored lines are
printed in line with black lines to test the alignment from one color to another. In a another section, colored lines
are printed such that one half is made with a forward pass and one half is made with a reverse pass to test the
alignment between the two directions. In both sets of patterns, printhead misalignment will be visible as a step
in the line at its center (marked with a short black line).
Bear in mind that small misalignments may not cause any print-quality defects. The printing process is designed
to hide the effects of small amounts of misalignment. The reference scale can be used to quantify the amount of
misalignment; errors below 4/600 inch are unlikely to cause print-quality defects.
The optimizer fluid is transparent and cannot usually be seen directly. The fluid can be seen on some substrates
(such as self-adhesive vinyl) when printed in conjunction with the colored inks. The cross pattern that is printed
above the reference scale is printed in this way and can be used to evaluate the alignment of the optimizer on
some substrates. In a well-aligned system, the light-colored cross at the center of the pattern will be aligned
with the four black lines at the sides of the pattern. The following figure shows how this pattern will appear on
the substrates on which it is visible. This sample is slightly misaligned.
If the printheads are misaligned or you feel unsure about them—for example, because a substrate crash
occurred—then align the printheads. See
Align the printheads
on page
146
.
ENWW
Improve print quality
115