HP Scitex FB950 HP Scitex FB950 - User Guide - Page 59

Manual BiDi Registration, Calibrate, Manual Calibrations, Proceed

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The image-sensor based calibration (sheet-fed media only) prints a reference pattern, ejects the media, and prompts you to rotate and reload the media so the pattern can be measured. To account for the slight variability in the media feed mechanism, repeat these calibrations three to five times to obtain the best calibration. The software allows you to position the patterns anywhere on the sheet so you can print multiple iterations on the same sheet. Input MFN - enter the Media Feed Number that was displayed after a previous media feed calibration, to return to that setting without performing the calibration again. Figure 4-1 Media feed calibration pattern TIP: To avoid cutting the 250 mm (10 in) pattern from the media web, copy the marks from the printed pattern to the long edge of a letter-size (or A4) sheet of paper. Then measure the transferred marks and adjust the media advance as needed until the marks are exactly 250 mm (10 in) apart. Manual BiDi Registration Bidirectional registration is a method to align each of the printheads so that dot placement is accurate in both directions along the X axis (along the direction of printhead travel). The bidirectional registration pattern consists of a series of vertical lines. Half the pixels in this pattern are printed in one direction, half of them in the other direction. When the pixels are accurately aligned, the pattern is clear. When the dots are not aligned, the pattern appears fuzzy and ill-defined. NOTE: AutoBiDi Calibration is the automatic version of this calibration. Try AutoBiDi first before running this manual calibration (see Auto calibrations on page 51). 1. Press the Calibrate key from the Front Page screen, then press Manual Calibrations in the menu. 2. Press Manual BiDi Registration on the menu. The control panel displays this prompt: Print a manual bidi registration page? 3. Press the Proceed (►) key. The printer prints the calibration pattern you selected. 4. When the calibration page has printed, the control panel displays this prompt: ENWW Manual calibrations 53

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The image-sensor based calibration (sheet-fed media only) prints a reference pattern, ejects the
media, and prompts you to rotate and reload the media so the pattern can be measured. To account
for the slight variability in the media feed mechanism, repeat these calibrations three to five times
to obtain the best calibration. The software allows you to position the patterns anywhere on the
sheet so you can print multiple iterations on the same sheet.
Input MFN — enter the Media Feed Number that was displayed after a previous media feed
calibration, to return to that setting without performing the calibration again.
Figure 4-1
Media feed calibration pattern
TIP:
To avoid cutting the 250 mm (10 in) pattern from the media web, copy the marks from the printed
pattern to the long edge of a letter-size (or A4) sheet of paper. Then measure the transferred marks and
adjust the media advance as needed until the marks are exactly 250 mm (10 in) apart.
Manual BiDi Registration
Bidirectional registration is a method to align each of the printheads so that dot placement is accurate
in both directions along the X axis (along the direction of printhead travel).
The bidirectional registration pattern consists of a series of vertical lines. Half the pixels in this pattern
are printed in one direction, half of them in the other direction. When the pixels are accurately aligned,
the pattern is clear. When the dots are not aligned, the pattern appears fuzzy and ill-defined.
NOTE:
AutoBiDi Calibration is the automatic version of this calibration. Try AutoBiDi first before
running this manual calibration (see
Auto calibrations
on page
51
).
1.
Press the
Calibrate
key from the Front Page screen, then press
Manual Calibrations
in the menu.
2.
Press
Manual BiDi Registration
on the menu.
The control panel displays this prompt:
Print a manual bidi registration page?
3.
Press the
Proceed
(
►
) key.
The printer prints the calibration pattern you selected.
4.
When the calibration page has printed, the control panel displays this prompt:
ENWW
Manual calibrations
53