Chapter 2
2-34
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 in a combat ion of the
status of detection by the pump cam sensor and the control of purge motor rotation by the pump encoder sensor.
F-2-29
Pump encoder
The photointerrupter-based sensor reads slits in the encoder film of the purge motor and controls the amount of
its rotation accordingly.
F-2-30
Valve open/closed detection sensor
The photointerrupter-based valve open/closed detection sensor detects the status of the valve cam.
The sensor detects that the ink supply valve is open when the sensor light is shielded by a link interlocked with
the valve cam.
- Carriage lock - Capping
- Suction
- Air passage valve open
- Idle suction
- Printing
- Suction during printing
- Wiping - Carriage lock
- Air passage
- Carriage move - Idle ejection
- Idle suction
Rotary flag
Sensor
Sensor
Slits
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