HP Scitex FB750 User Guide - Page 59

Media Feed Calibration, Jet Status Lines, Default Registration Data, Media Feed, Proceed

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● Jet Status Lines - Print a quick test pattern to see which jets are out. ● Default Registration Data - Sets all registration data to zero. After calibration and jet mapping, perform a linearization or color calibration (as supported by the RIP). See Linearization on page 58. NOTE: The manual BiDi and X head calibrations are time-consuming and can be error-prone, but is necessary when calibrating transparent media or other media that the printer's digital image sensor cannot calibrate. Media Feed Calibration This calibration allows you to calibrate the accuracy of the media advance. Inaccurate media advance can result in blank spaces between print swaths (too much advance) or overlapping swaths (too little advance). 1. On the Manual Calibrations menu, press Media Feed. 2. Select the calibration method and press Proceed. Depending on the loaded media, some options may not be displayed. 990 mm (39 in) calibration - Sheet fed only, uses the printer's onboard image sensor for precise adjustments. If the media feed needs larger adjustments, use the ruler-measured calibrations first. Use for maximum accuracy. 510 mm (20 in) calibration - Sheet fed only, uses the printer's onboard image sensor for precise adjustments. If the media feed needs larger adjustments, use the ruler-measured calibrations first. Use to conserve media. 900 mm (34 in) calibration - Prints a 900 mm (34 in) test pattern so you can verify its length with an accurate metal ruler. Cut the pattern from the media web, then measure and adjust the media advance as needed until the pattern is exactly 900 mm (34 in) long. 250 mm (10 in) calibration - Prints a 250 mm (10 in) test pattern so you can verify its length with an accurate metal ruler. This is not as precise as the 900 mm (34 in) calibration, but it uses less media. Measure and adjust the media advance as needed until the pattern is exactly 250 mm (10 in) long. 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. TIP: To achieve the best results from the ruler-measurement calibrations: Use a good-quality ruler with accurate marks. Use a ruler that is in the same units as the pattern selected. (Do not attempt to use a metric ruler to read an English-units pattern or vice-versa.) Use a ruler that is at least as long as the pattern you are measuring. (Do not attempt to add up shorter ruler measurements to achieve the total length of the pattern.) To avoid ruler issues, use the image-sensor based calibration. 52 Chapter 7 Calibrate the printer ENWW

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●
Jet Status Lines
—
Print a quick test pattern to see which jets are out.
●
Default Registration Data
—
Sets all registration data to zero.
After calibration and jet mapping, perform a linearization or color calibration (as supported by the RIP).
See
Linearization
on page
58
.
NOTE:
The manual BiDi and X head calibrations are time-consuming and can be error-prone, but is
necessary when calibrating transparent media or other media that the printer’s digital image sensor cannot
calibrate.
Media Feed Calibration
This calibration allows you to calibrate the accuracy of the media advance. Inaccurate media advance can
result in blank spaces between print swaths (too much advance) or overlapping swaths (too little advance).
1.
On the Manual Calibrations menu, press
Media Feed
.
2.
Select the calibration method and press
Proceed
. Depending on the loaded media, some options may
not be displayed.
990 mm (39 in) calibration
—
Sheet fed only, uses the printer's onboard image sensor for precise
adjustments. If the media feed needs larger adjustments, use the ruler-measured calibrations first. Use
for maximum accuracy.
510 mm (20 in) calibration
—
Sheet fed only, uses the printer's onboard image sensor for precise
adjustments. If the media feed needs larger adjustments, use the ruler-measured calibrations first. Use
to conserve media.
900 mm (34 in) calibration
—
Prints a 900 mm (34 in) test pattern so you can verify its length with an
accurate metal ruler. Cut the pattern from the media web, then measure and adjust the media advance
as needed until the pattern is exactly 900 mm (34 in) long.
250 mm (10 in) calibration
—
Prints a 250 mm (10 in) test pattern so you can verify its length with an
accurate metal ruler. This is not as precise as the 900 mm (34 in) calibration, but it uses less media.
Measure and adjust the media advance as needed until the pattern is exactly 250 mm (10 in) long.
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.
TIP:
To achieve the best results from the ruler-measurement calibrations: Use a good-quality ruler
with accurate marks. Use a ruler that is in the same units as the pattern selected. (Do not attempt to use
a metric ruler to read an English-units pattern or vice-versa.) Use a ruler that is at least as long as the
pattern you are measuring. (Do not attempt to add up shorter ruler measurements to achieve the total
length of the pattern.)
To avoid ruler issues, use the image-sensor based calibration.
52
Chapter 7
Calibrate the printer
ENWW