MAINTENANCE PROCEDURES
3-12 20509 Issue 7 Jan 2018
Note: This procedure assumes the printer has more than one print
head. If only one head is fitted, the basic procedure is the same.
Flushing Procedure.
(1) Disconnect the QCD from the ink supply container.
(2) Make sure that the Pump Inhibit switch is set to 0 (Inhibit).
(3) Close the valve on each print head and remove the heads from their
mountings.
(4) Place all the print heads with their nozzles over a suitable container.
(5) Loosen each nozzle plate sufficiently for ink to escape.
(6) Open the valve on one print head and allow the contents of the ink
system to drain into the beaker.
(7) Close the valve.
(8) Remove the QCD from the feed pipe. Immerse the free end of the
pipe in a container containing several litres of the solvent appropriate
to the ink type currently used in the machine. Do not allow this
container to run dry.
(9) Set the Pump Inhibit switch to position 1 to allow the pump to
pressurise the ink system. When the pump stops, set the switch to
position 0. The ink system will now be full of solvent.
(10) Open the valve in the first print head and allow the solvent in the
system to drain from the nozzle plate.
(11) Close the valve.
(12) Repeat steps (9) to (11), draining the ink out through the next print
head. Repeat this until the ink system has been flushed five times
and each head at least three times.
(13) Refit the QCD to the feed pipe and connect a new colour ink
container.
(14) Bleed all the heads (see page 4-8) until the new ink emerges.
(15) Make sure the nozzle plates are secure. The printer can now be used
to print the new colour.
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