Marsh PatrionPlus, Техническое руководство

Страница: 179 / 269

Troubleshooting
6-18
29669/02080 Rev AF
Double Backflushing a Nozzle Perform this procedure only if you were unsuccessful in achieving good
quality print by backflushing a nozzle. Double backflushing uses two
syringes to create a vacuum effect to remove any contaminents lodged in
the nozzle.
Note: This procedure requires the use of a Backflush Kit. To order see the
"Parts List."
1) Unplug the controller and the printhead power supply.
2) Disconnect the ink line, data lines and power supply cables from the
printhead.
3) Remove the ground wire. (See Figure 6E.)
4) Remove the printhead enclosure.
5) Remove the printhead assembly from the case. Note: Nozzle blocks
must be removed with the printhead assembly. Take care not to stress
the ink lines.
6) From your Backflush Kit, obtain the small and the large syringe.
7) Cut 6" (15.2 cm) of valve tubing and attach to the small syringe.
8) Cut 3/8" (0.95 cm) of ink tubing and attach to the large syringe.
9) Double backflush a nozzle as follows:
Note: Double backflush only one nozzle at a time.
a. Disconnect the outlet tubing from the nozzle you want to backflush;
Direct the tubing into a collection container.
b. Depress the small syringe plunger all the way in, and connect to the
back of the nozzle to be backflushed. (The syringe should be
empty.)
c. Fill the large syringe with solvent – porous or non-porous, as
applicable.
d. Press the tubing against the front of the nozzle to be backflushed.
e. Depress the plunger of the large syringe while pulling the plunger
of the small syringe.
f. Remove the large syringe.
g. Carefully disconnect the small syringe.
h. Reconnect the outlet tubing to the nozzle.
i. Repeat the above steps for additional nozzles.