User Manual

221
2900H EN 20071108 Troubleshooting
DRYSTAR 5500/5503 REFERENCE MANUAL
Overview of calibration functions
Three calibration functions are provided for the Drystar 5500.
Understanding the calibration policy and the calibration initiation
You should regularly perform a film calibration to assure that the image
quality remains optimal.
Film calibration can be initiated in 2 ways:
• Automatically, i.e. after loading every ‘x’ new film packs (automatic
initiation),
• Manually, i.e. you decide for yourself when to perform a film calibration,
e.g. daily, once a week, or only when the image quality tends to degrade.
For setting automatic or manual film calibration initiation, refer to ‘Changing
general image quality settings - Film calibration’ on page 91.
Calibration Purpose When?
1 ‘Film calibration’
• To measure and set the
system density of the
printer.
• To measure and set the
film sensitometry values.
•Automatic.
• After an explicit
action of the
operator.
2 ‘Print head cleaning’
To eliminate white dots or
lines in transport direction.
•When image
quality problems
occur.
3
‘Print head profile
calibration’
To reduce vertical density
irregularities on the film.
• After an explicit
action of the
operator.
Some calibration functions are interrelated, so do not perform any of the
above calibration functions as an isolated procedure.
Before performing a calibration, read the general guidelines as described in
‘Understanding the calibration policy and the calibration initiation’ on page 221.