Conditions Required for Accurate Multifeed Detection

Multifeed is an error where two or more sheets are fed through the ADF at once. Multifeed can be detected by enabling the multifeed detection in the scanner driver.
The following conditions are required for an accurate multifeed detection.

• Paper weight: 52 to 127 g/m² (14.0 to 34.3 lb)
• Do not punch holes anywhere within an 80 mm (3.15 in.) area that is located in the center of a document. Refer to Fig 1 in "Documents for Scanning".
• Do not attach another document to a document with glue or any other adhesive anywhere within an 80 mm (3.15 in.) area that is located in the center of a document. Refer to Fig 1 in "Documents for Scanning".
• Altitude: 0 to 2,000 m
  When a document that weighs 100 g/m² (26.8 lb) or more is scanned at a high altitude (higher than 2,000m), it may be detected as a multifeed.

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Important:

The above conditions apply when you align the center of a document with the center of the roller part of the pick roller unit. Scanning a thick document always causes the wrong multifeed detection. So, disable the multifeed detection in the scanner driver when scanning such documents.

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HINT:

The accuracy of a multifeed detection may drop depending on the document type. Multifeed cannot be detected for the top 30 mm (1.18 in.) of a document.

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