HP (Hewlett-Packard) FB910 Printer User Manual


 
Manual Calibrations 4-11
Use a printer’s loupe or magnifying glass if the patterns are
difficult to see.
5. Press the , or ) control panel keys repeatedly until the
number next to the pattern that is closest to aligned perfectly
is displayed.
For example, if pattern -1 is the closest aligned, press the )
key to change the display to:
X Direction Registration
Head 2: -1
If a printhead is extremely out of alignment, there may be no
pattern in alignment. Since the black vertical bars are five
pixels apart, you can add +5 or -5 to a pattern number to
shift the colored bars up or down by one black bar. Alterna-
tively, you can repeatedly perform the X calibration, which
Fig. 4-2. Sample head calibration patterns