Chapter 2
2-20
2.3.2.5.2 Structure of Purge Unit
0012-6341
a) Cap unit
The cap unit cap the nozzle assembly in the left and right printheads during capping and cleaning. The part of the cap unit that comes into contact with the face plate
of the nozzle assembly is made of rubber. Two caps are in position to meet each of the printheads mounted on the carriage (six trains of nozzles).
The cap unit are activated to protect the nozzle assembly on capping. When the carriage moves to the home position , the cap unit are elevated by the cap cam that
is driven by the capping motor, capping the nozzle assembly to protect it.
These cap unit cap the nozzle assembly to suck inks from the printhead by means of the suction pump.
F-2-15
b) Wiper unit
The wiper unit are driven by the purge motor to wipe the six trains of nozzles in the nozzle assembly in the printhead simultaneously.
A pair of wiper blades are in position to ensure wiping performance. The wiping operation operates on a slide wiping basis, sliding the wiper blades via wiper cams
through the normal rotation of the purge motor.
Wiping is executed by the wiper blades moving at a constant speed to the front of the printer after the end of a print or suction operation.
A wiper blade set perpendicularly to the head wipes the entire face of the printhead, followed by a narrower blade wiping the nozzle assembly.
The wiper blades are cleaned before they are replaced at the wiping position after wiping to preserve wiping performance.
Wiper blade cleaning is carried out by scraping off the inks that have been wiped off from the head with an ink scraper linked to the maintenance cartridge, then
wiping the blades with a blade cleaner.
Wet wiping is carried out for added wiping removal performance, whereby the wiper blades are moistened with glycerin as they are pressed against an absorber
impregnated with glycerin. The quantity of glycerin used is managed by counting the number of times the wiper blades have been pressed against the absorber.
When this count reaches to the specified values, either a replacement warning (continued print available) or replacement required indication (service call error) is
issued.
F-2-16
c) Pump unit
The pump unit (suction pump) is a tube pump that pressurizes the ink tubes with rotating rollers to generate a negative pressure for sucking inks.
A single tube is sequentially pressurized by a pair of rotating rollers to control the level of ink suction by a wide margin.
Wiper
u
nit
C
a
rri
a
ge lockpin
C
a
p
P
u
rge motor
Glycerin t
a
nk
P
u
mp encoder
s
en
s
or
P
u
mp c
a
m
s
en
s
or
Cap
Ink scraper
Glycerin
absorber
Printhead
Wiper blades
Blade holder
Glycerin tank
Wiper cam
Summary of Contents for iPF8400S Series
Page 1: ...Feb 27 2017 Service Manual iPF8000 series iPF8400S ...
Page 2: ......
Page 6: ......
Page 11: ...Chapter 1 PRODUCT DESCRIPTION ...
Page 12: ......
Page 14: ......
Page 63: ...Chapter 2 TECHNICAL REFERENCE ...
Page 64: ......
Page 106: ......
Page 107: ...Chapter 3 INSTALLATION ...
Page 108: ......
Page 110: ......
Page 123: ...Chapter 3 3 13 F 3 22 6 FAN UNIT A ...
Page 125: ...Chapter 3 3 15 ...
Page 126: ......
Page 127: ...Chapter 4 DISASSEMBLY REASSEMBLY ...
Page 128: ......
Page 130: ......
Page 167: ...Chapter 4 4 37 ...
Page 168: ......
Page 169: ...Chapter 5 MAINTENANCE ...
Page 170: ......
Page 172: ......
Page 177: ...Chapter 6 TROUBLESHOOTING ...
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Page 180: ......
Page 215: ...Chapter 7 SERVICE MODE ...
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Page 272: ...Chapter 7 7 54 ...
Page 273: ...Chapter 8 ERROR CODE ...
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Page 311: ...Feb 27 2017 ...
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