Purge Section; Purge Section Functions - Canon S600 Service Manual

Part 3: Technical Reference

3.2 Purge Section

3.2.1 Purge section functions

In order to maintain good printing quality, the purge section maintains the BJ
cartridge's nozzles. The purge section's functions consist of capping and cleaning.
a) Capping
The purge unit's cap is pressed against the print head's face to protect the nozzles
from dust, etc., and to prevent the nozzles from drying out. To prevent the capping
position from shifting, the carriage is locked in place at the same time.
When the cap is open while the printer is on standby for printing and a certain
period of time elapses (55 sec. with no paper or 20 min. with paper loaded), the print
head will be capped automatically. You can also cap the print head by pressing the
POWER button to turn off the printer.
b) Cleaning
Cleaning executes the following operations:
Wiping: Paper residue and dried ink on the print head's face plate are wiped off.
Suction: The ink is sucked out of the print head to refresh the nozzles with new ink.
Maintenance jet: To eliminate any air bubbles in the head's nozzles and to remove
waste particles near the nozzle openings, ink is ejected from the nozzles onto the cap
and maintenance jet receptacle.
Cleaning is performed at the times below to ensure that the head produces high-
quality printing.
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S600