How to lock Paper Feed Mechanism on Canon Pro-10 / Pro-100 – part two
Paper Feed Mechanism – part two
Drive power transmission and problem detection
[ Transmission of the drive power to feed paper ]
The drive power is transmitted in different ways according to the paper path.
a) In paper feeding from the Rear Tray
The AP Motor supplies the power to pick up paper and the PF Motor supplies the power to feed and eject the paper. The drive power from the AP Motor is transmitted via the Swing Arm Gear to the applicable part. For details of Swing Arm Gear, see “Drive Switch Mechanism.”
b) In paper feeding from the Manual Feed Tray
The MF Motor supplies the power to pick up paper and the PF Motor supplies the power to feed and eject the paper. The drive power from the MF Motor is transmitted via the Swing Arm Gear and Control Gear to the applicable part. For details of Swing Arm Gear and Control Gear, see “Drive Switch Mechanism.”
[ Detection of problem ]
The printer has four sensors for the paper feed system, the LF Encoder Sensor and EJ Encoder Sensor to detect the operation of the paper feed mechanism, and the PE Sensors on both the PF Roller side and the EJ Roller side to detect the paper position.
1) LF Encoder Sensor, EJ Encoder Sensor
The sensors see whether the PF Roller and EJ Roller rotate properly. By reading the slit of the Disk Film attached to the PF Roller and EJ Roller, the sensors detect the operation of the parts that receive the power from the PF Motor. If the mechanism fails, the PF Roller or EJ roller does not rotate properly, causing an error.
2) PE Sensor
The sensor detects whether paper feeds properly. When paper contacts the PE Sensor Lever that is attached to the chassis on the PF Roller side, the lever falls and the sensor detects presence of paper. The PE Sensor Lever on the EJ Roller side operates in the same way. If the PE Sensor cannot detect paper presence after a certain period of time has elapsed since the start of paper feeding, “no paper” is indicated. If the PE Sensor keeps detecting paper presence for a certain period of time after paper eject operation, “paper jam” is indicated.