Panasonic KV-S5055C (serv.man2) Service Manual ▷ View online
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5.4.
Lower Block
5.4.1.
Mechanical Parts
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5.4.2.
Boards
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6 MECHANICAL FUNCTION
6.1.
Paper Feed Mechanism (Auto)
(Fig. 6.1.1)
1. When the documents are set on the Hopper and the scanning command is issued from PC, the Conveyor Motor will be driven
to rotate the three Drive Rollers (Drive Roller 1 to 3) and Exit Roller. And at this time, the gate will open.
to rotate the three Drive Rollers (Drive Roller 1 to 3) and Exit Roller. And at this time, the gate will open.
2. Then, the Paper Feed Motor will be driven to rotate the Paper Feed Roller and the Separation Roller in the feed direction.
At this time, the Paper Feed Roller will move down until the roller is in contact with the documents, which enables the roller to
feed the documents.
The Double-feed Prevention Roller is supported by shaft fixed via a torque limiter, and it is pushed against the Separation Roller.
3. When documents enter the separation section, the Double-feed Prevention Roller exerts a manipulation force onto them,
which depends on a set torque. In the case of continuous paper feed, the documents are separated by this manipulation force,
so only one sheet of the documents is fed to the scanning section.
When the document passes through the Waiting Sensor, the Paper Feed Motor will be driven to rotate the Double-feed
Prevention Roller in the reverse direction to ensure separation of the first document from the following documents. At this time,
the Paper Feed Roller rises to separate from the documents.
At this time, the Paper Feed Roller will move down until the roller is in contact with the documents, which enables the roller to
feed the documents.
The Double-feed Prevention Roller is supported by shaft fixed via a torque limiter, and it is pushed against the Separation Roller.
3. When documents enter the separation section, the Double-feed Prevention Roller exerts a manipulation force onto them,
which depends on a set torque. In the case of continuous paper feed, the documents are separated by this manipulation force,
so only one sheet of the documents is fed to the scanning section.
When the document passes through the Waiting Sensor, the Paper Feed Motor will be driven to rotate the Double-feed
Prevention Roller in the reverse direction to ensure separation of the first document from the following documents. At this time,
the Paper Feed Roller rises to separate from the documents.
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4. Then, the leading edge of the document advances to the Drive Roller 1 position, and then passes through the Slip Detect Sensor.
At this time, if the document does not advance within a defined period, the pressure applied to the Separation Roller from the
Double-feed Prevention Roller is strengthened to prevent the document from slipping.
(For the pressure mechanism, see Fig. 6.1.2.)
When the leading edge of the document reaches the Slip Detect Sensor, the Paper Feed Motor will stop.
At this time, if the document does not advance within a defined period, the pressure applied to the Separation Roller from the
Double-feed Prevention Roller is strengthened to prevent the document from slipping.
(For the pressure mechanism, see Fig. 6.1.2.)
When the leading edge of the document reaches the Slip Detect Sensor, the Paper Feed Motor will stop.
(Fig. 6.1.2) Pressure Mechanism
5. When the leading edge of the document passes through the Starting Sensor, image scanning starts after a defined period.
(i.e., the time required for the document to advance from the Starting Sensor to the scanning start point)
(i.e., the time required for the document to advance from the Starting Sensor to the scanning start point)
6. The document passes through the Exit Sensor and exits from the scanner.
7. When the trailing edge of the document passes through the Waiting Sensor, the Paper Feed Motor is driven again to feed
the 2nd document.
the 2nd document.
8. 2 to 7 above are repeated.
Note:
When the scanner’s buffer becomes full, the scanner stops to prevent buffer overflow, while continuing
to allow data to be transferred to the PC.
to allow data to be transferred to the PC.
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