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Chapter 2

2-34

2.5.2 Ink passage system

0024-9591

F-2-32

Pump cam sensor

As the cam rotates, it shields the sensor light of the photointerrupter-based pump cam sensor or allows it to be transmitted. The status of the purge unit, such as

capped, suction and wiping, is detected by the combination of the pump cam sensor detection and the control of pump motor rotation by the pump encoder sensor.

F-2-33

Pump encoder

Pump cam sensor

Head management sensor

Valve open/closed

detection sensor

Agitation cam sensor

- Carriage lock - Capping

- Suction

- Air passage valve open

- Idle suction

- Printing