Panasonic KV-N1058X / KV-N1028X / KV-N1058Y / KV-N1028Y Service Manual ▷ View online
16
7 Mechanical Function
7.1.
Paper Feed Mechanism (Auto feeding Mode)
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 DFP Roller (supported 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
Double Feed
Detector[Receive]
Detector[Receive]
Paper Feed Roller
Document Stage
Gate
DFP 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
document and the 2nd.)
(A difference in the rotation speeds of the Conveyor Roller and Paper Feed Roller creates a distance between the1st
document 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
scanning process.
transferred to the PC continuously. When enough free buffer space is secured again, the scanner resumes the
scanning process.
7.2.
Paper Feed Mechanism (Manual)
Manual feed selector
DFP Release Cum
DFP Holder
1
Paper Feed Roller
DFP Roller
2
3
When scanning bound paper with the Manual Feed Selector set to "AUTO" the DFP Roller is pressed against the Paper Feed
Roller, and this results in a separating force being applied to the document, which will separate the layers, resulting in damage to
the document.
This problem can be avoided by scanning bound paper with the Manual Feed Selector set to "MANUAL".
With "MANUAL" set, the DFP Roller is released from the Paper Feed Roller and so bound paper can be fed and scanned as
if it were a single sheet of paper.
Roller, and this results in a separating force being applied to the document, which will separate the layers, resulting in damage to
the document.
This problem can be avoided by scanning bound paper with the Manual Feed Selector set to "MANUAL".
With "MANUAL" set, the DFP Roller is released from the Paper Feed Roller and so bound paper can be fed and scanned as
if it were a single sheet of paper.
Auto Mode
Manual Mode
1. The Manual feed selector is changed to Manual.
2. The DFP Release Cum pushes the DFP Holder.
3. The holder is moved up and the DFP Roller is released from the Paper Feed Roller.
2. The DFP Release Cum pushes the DFP Holder.
3. The holder is moved up and the DFP Roller is released from the Paper Feed Roller.
Note:
Do not scan bound paper with the Manual Feed Selector set to "AUTO".
When scanning bound paper, be sure the Manual Feed Selector is set to "MANUAL".
Do not scan bound paper with the Manual Feed Selector set to "AUTO".
When scanning bound paper, be sure the Manual Feed Selector is set to "MANUAL".
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7.3.
Sensor Mechanism
7.3.1.
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.
7.3.2.
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.
7.3.3.
Door Sensor
The Door Sensor turns OFF when the ADF Door is closed to block the sensor with the claw.
Paper Sensor
Paper Sensor
Paper Feed Direction
Paper Feed Direction
Right Side View
Sensor Front View
Right Side View
Paper Feed Direction
Starting Sensor[Generate]
Starting Sensor[Receive]
Left Side View
Door Sensor
Door Sensor
Door Open
Claw
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7.4.
Gate Mechanism
1. The Conveyor Motor is reversed after documents
feed is finished and the cam of the Feed drive shaft
is rotated.
The Gate lock levers and Document stages are lifted
by the cam and the Gates are locked to stop feeding
documents.
Document stages work so that documents do not
touch Feed rollers.
is rotated.
The Gate lock levers and Document stages are lifted
by the cam and the Gates are locked to stop feeding
documents.
Document stages work so that documents do not
touch Feed rollers.
2. When the Feed drive shaft is rotated 180
°
in the
direction feeding document, the Gate lock levers are
lowered and the Gates becomes free.
It is the possible state for the Gates to feed
documents.
The Document stages start a descent at that time.
lowered and the Gates becomes free.
It is the possible state for the Gates to feed
documents.
The Document stages start a descent at that time.
3. When the Feed drive shaft is rotated 270
°
in the
direction feeding document, the Document stages
are fully lowered.
The cam of Feed drive shaft is stopped rotating by
the stopper of Lower chassis and Feed drive shaft is
slipped by the coaxial Torque limiter.
The Feed drive shaft is kept driving by the function
of the torque limiter and the document feeding is
maintained.
are fully lowered.
The cam of Feed drive shaft is stopped rotating by
the stopper of Lower chassis and Feed drive shaft is
slipped by the coaxial Torque limiter.
The Feed drive shaft is kept driving by the function
of the torque limiter and the document feeding is
maintained.
Feed Roller
Feeding direction
Gate
Document Stage
Gate Lock Lever
Feed Drive Shaft
Cam
Gate Lock Levers
are lowered.
are lowered.
Gates becomes free.
Document Stages are lowered.
Torque Limiter
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