Oce Arizona 318 GL, Руководство пользователя

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Masking the Vacuum Table
When the printer table has only one large vacuum zone you must mask the area around the
media to create a closed vacuum system. Use scrap media or material that is equal to or less than
the thickness of the media to mask the table. Also when you create custom vacuum zones, if the
media does not cover a whole zone you need to mask any exposed parts of the table in that zone.
You can tell when the vacuum is sealed by the sound it makes and also by the vacuum gauge,
which must read at least 20 "Hg.
Vacuum Table Foot Pedal
The vacuum foot pedal toggles the table vacuum on or off. It helps the operator to secure the
media on the vacuum table since it allows hands-free operation. The vacuum must be turned on
prior to starting a print, and the vacuum cannot be turned off until a print is completed.
Vacuum Bleed Valve & Gauge
The bleed valve handle is located to the left of the three vacuum control handles. This bleed valve
can be adjusted to control the amount of vacuum suction on the media. Less suction reduces
artifacts caused by the suction when imaging on flexible media. If you see dimples on the media
that are the same size and location as the vacuum table punched holes, introduce bleed until the
dimples disappear from the media.
The bleed valve is off when its handle is in the horizontal position. To activate the bleed valve,
turn the handle to the vertical position. The closer the handle is to the vertical position, the more
vacuum pressure is reduced.
The vacuum guage is located on the side of the table above and to the left of the bleed valve
handles. It provides a visual representation of the actual pressure in the vacuum table system.
NOTE
Use the vacuum gauge to determine if a zone is properly masked. When the active zone is
properly masked the gauge will read at 20"Hg (68 kPa) or higher. Small leaks can reduce this
number and therefore the efficiency of the vacuum. Porous media can also degrade the vacuum
effect.
If the vacuum gauge for an active zone reads below 10"Hg (34 kPa) and you have ensured that
the area is properly masked and taped off, you may have a leak in the vacuum system. Place a
service call only if you determine that the zone is correctly masked and the gauge reads
consistently low.
How to Maintain the Vacuum Overlay Sheet
If ink build-up occurs on the overlay sheet, remove the ink. If it is not removed, the print gap can
be affected and this may affect the vacuum table's ability to secure the media properly. To
remove ink we recommend that you use a paint scraper containing a straight edge razor blade
(these can be found at a local hardware store). Refer to the Maintenance section for more detailed
instructions.
The Media Vacuum System
Chapter 5 - How to Operate Your Océ Arizona Printer 69