Chapter 4 Other Functions

3.Press the Start Key to start scanning.

“Verifying…” is displayed.

Hint

If the specified count is exceeded while scanning, or if the scanned count does not reach the specified count when scanning is finished, an error is displayed.

The specified count is exceeded while scanning

Scanning finishes without reaching the specified count

■Double-Feed Detection Function

The scanner can detect double feeds. Two detection methods are used: comparison of document lengths, and ultrasonic detection of spacing between documents, which is set in the ISIS/TWAIN driver.

IMPORTANT

•When a double feed is detected, documents already fed through the feed inlet are transported to the eject outlet, and operation stops.

•The message that appears when a double feed is detected depends on the Rapid Recovery System setting specified in the ISIS/TWAIN driver. See “When the Rapid Recovery System is Enabled” on p. 3-22for details.

•Double feed detection in the Count-Only mode is set in the User Mode, and double feeds are detected ultrasonically. (See “Double-Feed Control Setting” on p. 4-11.)

Detecting Double Feeds by Document Length

This detection method is effective when scanning documents with pages of the same size. The length of the first page scanned serves as a standard for comparing subsequent pages, and when a page is detected to be approximately two inches (50 mm) longer or shorter than the standard, a double feed is detected and document transport is stopped.

Ultrasonic Double-Feed Detection

This detection method is effective when scanning documents with pages of different sizes. The space between overlapping pages is detected ultrasonically, and document transport stops when a double feed is detected.

Ultrasonic Double-Feed

Detection Sensor

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