EPSON AcuLaser CX11/CX11FRevision A
2.3.2 ADF Mechanism OverviewSENSORS
The ADF of this product is designed to feed original document to be scanned by the ? DOC Sensor: Detects whether document is loaded on the document
fixed CCD Sensor in the scanner unit and allows up to 50 sheets of document (when tray or not. The document should be loaded with its
2
the paper basic weight is 80g/m) to be loaded and scanned automatically. The leading edge contacting with the guide for it, or the
documents are scanned in paper feed direction while they are fed by the ADF. The key sensor cannot detect the document.
mechanisms of the ADF are as follows.
? AS Sensor: Detects that document is transported to the Separation
Roller after starting scanning operation.The sensor turns
PAPER FEED MECHANISM
ON when it detects the leading edge of the document,
? ADF Motor: The four-phase pulse motor with 96 poles drives the paper and turns OFF when it detects the posterior end of the
document. Scanning operation for the next document is
feed mechanism that transports document loaded on the
started if the DOC Sensor is ON when the AS Sensor
document tray to scanning section.
becomes OFF.
? Clutch: Switches on and off the Pick up Roller by transmitting or not
transmitting the ADF Motor drive. The clutch is turned on to ? RS Sensor: Detects whether document is on the Turning Roller or
not. Scanning document is started when the document is
transmit the motor drive to the Pick up Roller when the DOC
transported by prescribed steps from when its leading
sensor is ON at the point of starting scanning operation.
edge is detected by the RS Sensor.
? Pick up Roller: Picks up document one by one and transports it to the next
mechanism.The roller lowers and contacts with document to ? ADF Cover Sensor: Detects whether the ADF cover is opened or closed. The
sensor turns ON when the ADF Cover is opened and
feed it by ADF Motor drive when scanning operation is
stops the ADF Motor and turns off the clutch.
started with the DOC sensor ON. When the leading edge of
the document is detected by the RS Sensor, the roller moves
? Document Width Sensor: Detects the positions of the side edge guides on the
upward to return to its standby position.
document tray. The two Document Width Sensors,
located at the position different from each other, detects
? Separation Roller : Located under the Pick up Roller to prevent multi-feed of
document size (width) by combination action of them as
documents.
follows.
? Turning Roller: Transports document fed by the Separation Roller to the
scanning position. This roller turns at a speed according to Table 2-4. Document Size Detection by Two Document Width Sensors
the print resolution so that scanning in paper feed direction
Edge Guide PositionB5 SensorLT Sensor
can be performed properly.
Letter sizeOFFON
? Exit Roller: Transports document that has been scanned and transported
A4 sizeOFFOFF
by the Turning Roller to the eject tray. Also changes the
position of the document stopper lever inside the document B5 sizeONOFF
tray.
OPERATING PRINCIPLESScanner Operating Principles126 |
ACEC
