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. (Note that the cleaning operation accompanied by suction is performed

only at the left cap.)

f) Carriage height adjustment

When the lift motor is driven to rotate the carriage height changing cams installed at both ends of the shaft, the height of the carriage shaft is varied to change the

spacing between the face of the printheads and the paper.

The printhead height is detected by the multisensor installed in the lower left part 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 color calibration 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.

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