HP 450c HP DesignJet 430, 450C, and 455CA Printer - User's Guide - Page 106

Test 3 Verticals - belt

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Special internal prints Using the Print Quality Test Print - Correct - Test 3 (Verticals) Incorrect Vertical-line straightness is a measure of the horizontal distance between the segments of a vertical line printed in two consecutive swaths. If the printer is working correctly, this distance should be less than 2 mils. There are two types of errors that may be shown by this test: Bidirectional error (the lines are vertical but are not correctly aligned). If you print the same print using a unidirectional print mode, the error should not appear. This error can occur for various reasons, including: - Incorrect distance between nozzles and media - Encoder-strip slots are damaged or dirty - Dirt on the pulley is causing the belt to slip - Friction between carriage bushings and slider rod. Inclined lines error. This occurs when the rows of nozzles on a cartridge are not perpendicular to the carriage axis (Y-axis). This error can occur for various reasons, including: - Badly seated cartridge - Faulty cartridge - Faulty carriage. 5-14

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5–14
-
-
Correct
Incorrect
Test 3 (Verticals)
Vertical-line straightness is a measure of the horizontal distance between the seg-
ments of a vertical line printed in two consecutive swaths.
If the printer is working
correctly, this distance should be less than 2 mils.
There are two types of errors
that may be shown by this test:
Bidirectional error (the lines are vertical but are not correctly aligned).
If you
print the same print using a unidirectional print mode, the error should not
appear.
This error can occur for various reasons, including:
–
Incorrect distance between nozzles and media
–
Encoder-strip slots are damaged or dirty
–
Dirt on the pulley is causing the belt to slip
–
Friction between carriage bushings and slider rod.
Inclined lines error.
This occurs when the rows of nozzles on a cartridge are not
perpendicular to the carriage axis (Y-axis).
This error can occur for various
reasons, including:
–
Badly seated cartridge
–
Faulty cartridge
–
Faulty carriage.
Special internal prints
Using the Print Quality Test Print