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BJC-6000
3.3 Purge Unit
3.3.1 Function of the purge unit
The purge unit keeps the BJ cartridge nozzles in good working condition to ensure
high printing quality. The unit is designed to provide both capping and cleaning
functions.
a) Capping
The capping function presses the purge unit's cap against the print head face to
prevent the nozzles from drying and becoming contaminated. During capping, a
cam is actuated to lock the carriage in place. During printing, capping starts 30
seconds or so after data stops. When printing is not performed, capping takes place
after a certain period of time (20 minutes in paper feeding mode, or 30 seconds in
other conditions) has elapsed since the last data was received, or when the POWER
button is used to switch the printer off.
b) Cleaning
The cleaning function includes the wiping action to wipe paper fibers or waste ink off
the head face plate, and the suction action to suck out ink from the head to refresh
the insides of nozzles with new ink, and the maintenance jet action to discharge the
ink from the nozzles into the maintenance jet splash guard for removing bubbles
from the head or dust around the outlet. The cleaning mechanism becomes
activated in the following cases to help maintain high quality printing.
Power ON Initial power on (1 time only)
Cleaning
Refreshing
Changing BJ cartridge/Ink tank
72 hours or more elapsed since previous cleaning
Before printing banner paper
Maintenance Jet Splash Guard
Printer Status
Switched on for the 1st time since connecting to AC (capped) 0.19
Switched on for the 1st time since connecting to AC (not capped) 0.34
72 hours or more elapsed since previous cleaning
(Specified number or more of dots or time elapsed since
previous cleaning)
Figure 4-19 Purge Unit
4-25
Part 4: Technical Reference
Reference Ink Consumption (mg)
Black
Color Photo
0.49
0.75
0.75
0.27
0.27
0.53
0.53
0.19
0.27
0.27
0.19
0.27
0.27
0.34
0.53
0.53
0.34
0.53
0.53
0.19
0.27
0.27
0.19
0.27
0.27
Purge Unit
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