Canon iPF605 - imagePROGRAF Color Inkjet Printer, Service Manual

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Chapter 2
2-19
F-2-12
e) Printhead maintenance unit
The printer performs the printhead cleaning operation at the home position of the carriage.
The purge motor is used for wiping. When the carriage is stationary at the home position, the printhead installed in the carriage is wiped with the wiper blade. The
wiper blade is pressed against the absorbent material soaked with glycerin so that the wiper blade is moistened with glycerin, thus improving the wiping perform-
ance.
Idle ejection of ink is performed on the cap, the borderless ink tray of the platen, and paper.
The suction operation is performed by rotating the pump motor after completion of capping.
f) Media thickness adjustment unit
The gap between the printhead face and media is changed with the rotation of the carriage height changing cam driven by the lift motor.
The height of the printhead is detected by the multi sensor mounted at the lower left of the carriage.
g) Multi sensor unit
The multi sensor mounted at the lower left of the carriage is composed of four LEDs (red, blue, green, infrared) and two light-sensitive elements which are used to
detect the leading edge, width, and skewing of paper and adjust the registration and head height.
The multi sensor reference plate is provided with a white plate. By measuring the quantity of the reflected light from the white plate, the reference value for gap
measurement is computed.
(Service mode: SERVICE MODE>ADJUST>GAP CALIB)
h) Shaft cleaner units
The shaft cleaners mounted at the left and right of the carriage are used to clean the carriage and apply oil to the shaft.
i) Internal temperature detection
A themistor for measuring the internal temperature is mounted on the carriage PCB on the rear of the head holder.
Lift cam sensor
Linear scale
Lift motor
Carriage height changing cam
Multi sensor reference plate
Head management sensor unit
Shaft cleaner
Shaft cleaner
Multi sensor
Carriage PCB
Linear encoder