Canon imageprograf ipf700 Service Manual page 80

Chapter 2
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.
Rotary flag
Sensor
- Carriage lock
- Wiping
Pump encoder
The photointerrupter-based sensor reads slits in the encoder film of the purge motor and controls the amount of
its rotation accordingly.
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.
2-34
- Capping
- Suction
- Carriage lock
- Air passage
F-2-29
F-2-30
- Air passage valve open
- Idle suction
- Carriage move
Slits
Sensor
- Printing
- Suction during printing
- Idle ejection
- Idle suction