The photo-interrupter-type pump cam sensor detects that the sensor light is shielded or unshielded by the rotary cam. The sensor detects the purge unit capping and

wiping states with the combination of the state detected by the pump cam and the state of pump motor rotation control performed by the pump encoder.

Rotary flag

- Carriage lock

- Wiping

Pump encoder

The pump encoder is a photo-interruptive type sensor. It reads the slits on the pump motor's encoder film to control the amount of pump motor rotation.

2-36

Sensor

- Capping

- Suction

- Carriage lock

- Air passage

Purge unit

Pump encoder

F-2-49

- Air passage valve open

- Printing

- Idle suction