Canon iPF720 - imagePROGRAF Color Inkjet Printer, Руководство по обслуживанию

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Chapter 2
2-26
b) Wipers
The wipers are driven by the purge motor to wipe the face of the printhead.
A pair of two wiper blades are installed to ensure wiping performance.
The wiping operation operates on a slide wiping basis, sliding the wiper blades via wiper cams through the rotation (normal) 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 after wiping before they are replaced at the wiping position to maintain wiping performance.
Wiper blade cleaning is carried out by scraping off the inks that have been wipe off from the head with the ink scraper. The wiper blade is subjected to wet wiping,
whereby it is pressed against an absorber impregnated with glycerin for added wiping removal performance. The quantity of glycerin used (tank capacity: 50 mL)
is managed by counting the number of times the wiper blade has been pressed against the absorber. When this count falls to equal any of the following values, either
a replacement warning (continued print available) or replacement required indication (service call error) is issued:
T-2-4
F-2-17
c) Pump
The pump (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. The timing at which the rotating rollers rotate is detected by
the pump cam sensor, with the distance of rotation being controlled by the driving of the purge motor.
F-2-18
Advance notice of replacement 47,500times
Service call 50,000times
Cap
Ink scraper
Glycerin absorbent material Printhead
Wiper blade
Blade holder
Glycerin tank
Wiper cam
Purge motor
Push rollers
To maintenance cartridge.
Pump encoder
Pump cam sensor
Cap
Pump unit
Cap
Ink tubes
Suction pump