Panasonic KV-S1057C / KV-S1027C / KV-SL1066 / KV-SL1056 / KV-SL1055 / KV-SL1036 / KV-SL1035 Service Manual ▷ View online
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5.3.
Board and Sensor
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6 Mechanical Function
6.1.
Paper Feed Mechanism
Fig. 6.1
1. When the document is set on the Feed Tray, and is detected by the Paper Sensor, the scanning command from the PC will
start the Conveyor Motor, which will move down the Document Stage and open the Gate, and rotate the Paper Feed Roller,
Conveyor Roller, and Exit Roller in the direction of the arrows.
Conveyor Roller, and Exit Roller in the direction of the arrows.
2. When the document enters the separation section inside the paper feed section, the Double Feed Prevention Roller (sup-
ported by a shaft fixed via a torque limiter) exerts force onto the document, which depends on the set torque.
When the paper is fed continuously, the 1st document is separated from the 2nd or more documents by this force, and is fed
to the scanning section.
If a Double Feed occurs when Double Feed detection mode has been set in the scanning software, the scanner will stop the
scanning process.
When the paper is fed continuously, the 1st document is separated from the 2nd or more documents by this force, and is fed
to the scanning section.
If a Double Feed occurs when Double Feed detection mode has been set in the scanning software, the scanner will stop the
scanning process.
3. When the leading edge of the document advances to the Conveyor Roller position, the document is fed at a speed that is 2.3
times as fast as the speed of the Paper Feed position.
4. When the leading edge of the document is detected by the Starting Sensor, scanning will start after a certain period of time
determined by the scanner.
Pickup Arm
Gate Lock Lever
Paper Sensor
Double Feed
Detector[Generate]
Detector[Generate]
Free Roller
Free Roller
CIS [B]
Reference Plate [F]
Exit Roller
CIS [F]
Starting Sensor
Control Board
Conveyor Motor
Power Supply
Conveyor Roller
DoubleFeed
Detector[Receive]
Detector[Receive]
Paper Feed Roller
Document Stage
Gate
Double Feed
Prevention Roller
Prevention Roller
Paper Feed Direction
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5. When the trailing edge of the document passes through the separation section, the continuous rotation of the Paper Feed
Roller during scanning, enables the next document to be fed.
(A difference in the rotation speeds of the Conveyor Roller and Paper Feed Roller creates a distance between the1st docu-
ment and the 2nd.)
(A difference in the rotation speeds of the Conveyor Roller and Paper Feed Roller creates a distance between the1st docu-
ment and the 2nd.)
6. The steps 2 to 5 above are repeated.
7. When the Paper Sensor detects no further documents, and the Starting Sensor detects the trailing edge of the document, the
7. When the Paper Sensor detects no further documents, and the Starting Sensor detects the trailing edge of the document, the
Conveyor Motor will stop rotating after a certain period of time determined by the scanner to end the scanning sequence.
8. After the conveyor motor stopped, by opposite rotation of the Conveyor Motor, the Document Stage is moved up and the
Gates are closed.
Note:
When the scanner’s buffer becomes full, the scanner stops to prevent buffer overflow, while allowing the data to be
transferred to the PC continuously. When enough free buffer space is secured again, the scanner resumes the scan-
ning process.
transferred to the PC continuously. When enough free buffer space is secured again, the scanner resumes the scan-
ning process.
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6.2. Sensor Mechanism
6.2.1.
Paper Sensor
The Paper Sensor turns ON when the document is properly placed on the Feed Tray to push the arm up away from the sensor.
6.2.2.
Starting Sensor
The Starting Sensor turns ON when the document is fed to the scanning-start position to obstruct the light axis line of the sensor.
6.2.3.
Door Detector
The Door Detector turns OFF when the ADF Door is closed to block the detector with the claw.
Paper Sensor
Paper Sensor
Paper Feed Direction
Paper Feed Direction
Right Side View
Feed Side View
Right Side View
Paper Feed Direction
Starting Sensor[Generate]
Starting Sensor[Receive]
Left Side View
Door Detector
Door Detector
Door Open
Claw
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