Purge Unit; Functions Of Purge Unit - Canon iPF6100 Service Manual

Canon ipf6000 series laser printers service manual
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2.3.2.5 Purge Unit

2.3.2.5.1 Functions of Purge Unit

iPF6100 / iPF6200 / iPF6000S
To maintain high print quality, the purge unit performs maintenance of the nozzles o the printhead.
The purge unit supports a capping function, cleaning function, and ink supply function.
a) Capping function
The capping function presses the cap of the purge unit against the face plate on the nozzle section of the printhead to prevent nozzle drying and dust adhesion.
Capping is performed when printing is complete, at the start of the suction operation, and when switching to the standby state due to an error.
The capping function also establishes the ink passage between the printhead and purge unit.
b) Cleaning function
The cleaning function restores the printhead to the state where ink can be easily discharged from nozzles. This function includes the following three types of oper-
ations.
- Wiping operation
This operation is performed to remove paper fibers and dried ink from to the face plate.
- Pumping operation
This operation is performed to remove ink from the nozzles and fill the nozzles with fresh ink.
- Maintenance jet operation
This operation is performed to spray ink from the nozzles to the cap, borderless ink jet tray, an paper to remove bubbles in the nozzles and dust and other foreign
particles.
c) Ink supply function
The suction pump of the purge unit operates together with the ink supply valve to supply ink to the printhead during the initial filling and ink level adjustment.
Details of the cleaning function are shown in the table below.
Name of Service mode
Cleaning mode
or PRINT INF
(Name of Main Menu)
Cleaning 1
CLN-A-1/CLN-M-1
(Head Cleaning A)
Cleaning 2
CLN-A-2
Cleaning 3
CLN-A-3
Cleaning 4
CLN-M-4
(Replace P.head)
Cleaning 5
CLN-M-5
(Move Printer)
Cleaning 6
CLN-A-6/CLN-M-6
(Head Cleaning B)
Cleaning 7
CLN-A-7
Cleaning 10
CLN-A-10
(Move Printer)
Cleaning 11
CLN-A-11
Cleaning 15
CLN-A-15
Cleaning 16
CLN-A-16
Cleaning 17
CLN-A-17
Operation
Normal cleaning
Ink level adjustment and cleaning
Initial filling ink
Ink drainage for head replacement
Ink drainage for secondary transport
Normal (strong) cleaning
Aging
Ink filling after secondary transport
Ink filling after head replacement
Dot count suction
Precipitated ink agitation
Cleaning (weak)
Description of cleaning
Removes dried ink from nozzles, thick ink accumulated on the
face, and paper particles.
Adjust the ink level in the head by suction, and then performs
normal cleaning.
Fills the empty tube (during initial installation) with ink, and
then performs normal cleaning.
Drains ink to replace the head (drains only the ink in the head).
Drains ink from the head and tube for secondary transport.
Performs suction stronger than when adjusting the ink filling
amount in the head or normal cleaning to unclog nozzles.
Performs idle ejection after replacement of the head.
Fills the empty tube (during installation after secondary
transport) with ink, and performs normal cleaning.
Performs normal cleaning after head replacement and ink
filling.
Performs suction to remove ink adhered to dried nozzles and
thick ink accumulated on the face when the dot count reaches
the prescribed value.
Performs the agitation (ink supply valve open/close) operation
to prevent the ink ingredient from precipitating.
Performs cleaning weaker than normal cleaning to unclog
nozzles.
Chapter 2
0013-4347
2-31

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