Maintenance - Oce Arizona 400 Series GT User Manual

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 re-
flected 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 are 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, immedi-
ately 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.
Attention:
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.
218 Chapter 12 - Printer Maintenance