Oce Arizona 250 GT User Manual page 148

Swab Printheads
Attention: Never "scrub" the printhead with a swab as this will drag debris into
other nozzles. Always slowly move the swab across the printhead with the swab
at an angle and not perpendicular to the printhead.
Never use Isopropyl alcohol to clean the printheads. Do not allow swabs to be
contaminated with any dust or dirt prior to use.
Note that the swab has a seam that can damage the printhead nozzles; use only
the semi-curved foam sides of the swab.
Caution: Use appropriate safety equipment — nitrile gloves and eye
protectors.
How to Swab a Single Printhead
Note: Swab one printhead at a time to reduce ink waste during the purge and also
to minimize ink spill on your hand. In order to achieve the most effective swab, it is
best to swab immediately after a purge while the ink is still dripping from the
printheads. Close the ink valve so that the ink is under slight pressure to help clear
debris from around the nozzles.
Open the maintenance station cover.
1.
Close the ink purge valves of the three other colors, but leave open the valve for the
2.
color you will swab.
Dip a swab in a small container of flush.
3.
Note: Use 1 swab per printhead. Do not re-dip a swab into the flush.
Press and release switch 1 to initiate a purge.
4.
Within 3 seconds of pressing the purge button, close the remaining purge valve. The
5.
carriage will lower to its purge height (4mm above the table surface) and the ink will
continue to drip from the printheads.
While the ink is still dripping, position the swab at the far end of the printhead and
6.
slowly draw the swab towards you. Hold the swab at an angle to limit dragging
debris from one nozzle to the next. Do not let the seam in the foam touch the nozzle
plate.
Rotate the swab by 180 degrees and repeat the previous step.
7.
Discard the swab and repeat Steps 2 to 6 for all the other printheads (if needed).
8.
Perform Printhead Maintenance.
9.
Run a Nozzle Check print or an image test print and verify that all nozzles are firing
10.
properly.
148 Chapter 10 Printer Maintenance