Oce Arizona 440 GT User Manual page 228

User Manual: Arizona (AZ) 440 GT, AZ 440 XT, AZ 460 GT, AZ 460 XT, AZ 480 GT, AZ 480 XT - Rev. B, 4/2013
How To Perform Printhead Maintenance
NOTE
More maintenance is required in dusty environments, or when there are
fibres protruding from the media, or when printing on reflective media
such as glass or metal (more reflected UV light hits the printheads). When
printing on reflective media it is advised to monitor the nozzle check and
printhead nozzle plates and to perform additional printhead maintenance,
if required, to prevent ink from partially curing/gelling on the printhead
nozzle plates.
Before you begin
Make sure the carriage is in the parked position. The carriage and gantry
automatically return to this position after an image is printed. Do not move
the carriage or gantry from this position as this will disable the ink pumps
and thus prevent the performance of an ink purge, which is necessary for
printhead maintenance.
NOTE
It is not necessary to turn off the UV lamps as they are shuttered.
However, they will be hot if they were recently on, so avoid touching
them.
Ink must be at the operating temperature of at least 40° Centigrade (104°
Fahrenheit) before you perform printhead maintenance. The Job Control
module displays the ink temperature. If the temperature is low, activate the
ink heater by clicking the icon and then monitor the temperature display.
CAUTION
Safety glasses with side shields, a protective apron, and nitrile gloves
must be worn when performing maintenance.
UV inks may cause sensitization by skin contact. If any ink contacts your
skin, immediately wash with water and soap and rinse thoroughly. If skin
irritation continues, consult a doctor. Avoid contact with the eyes and
skin. Wear a long-sleeved shirt or other covering when performing
printhead maintenance.
The underside of the UV lamps may be hot, avoid touching them. Also,
be aware that the carriage moves up and down during printhead
maintenance and there is a crushing hazard if your hand or arm are
placed in the area above the three switches.
IMPORTANT
Do NOT press up too hard on the printhead while you swipe it with the
suction-head as this can dislodge the printhead and require a service call
to re-seat the printhead.
228 Chapter 12 - Printer Maintenance