Chapter 2 How to Load Documents
Conditions for Multifeed Detection
Multifeed is an error where two or more sheets are fed through the ADF at once. It is also called a multifeed when a different document length is detected.
Multifeed detection is performed by either checking the overlapping of documents, length of the documents, or the combination of both. The following conditions are required for an accurate detection.
Detection by overlapping
zLoad documents of the same paper weight in the ADF paper chute.
zPaper weight: 52 to 127 g/m2 (14 to 34 lb)
zDo not punch holes within 50 mm (1.97 in.) over the vertical center line of the document. See Fig.1.
zDo not attach other documents within 50 mm (1.97 in.) over the vertical center line of the document. See Fig.1.
Detection by length
zLoad documents of the same length in the ADF paper chute.
zVariance in document lengths: 1% or less
zDo not punch holes within 50 mm (1.97 in.) over the vertical center line of the document. See Fig.1.
Detection by overlapping and length
zLoad documents of the same paper weight and length in the ADF paper chute.
zPaper weight: 52 to 127 g/m2 (14 to 34 lb)
zVariance in document lengths: 1% or less
zDo not punch holes within 50 mm (1.97 in.) over the vertical center line of the document. See Fig.1.
zDo not attach other documents within 50 mm (1.97 in.) over the vertical center line of the document. See Fig.1.
The above condition applies when the document is set to the
！center of the pick roller width.
Fig. 1
Reference point | 50 |
|
Top
Front side
Feed direction
Bottom
Center of document | ( Unit : mm) |
zThe rate of multifeed detection may drop with some documents.
Multifeed cannot be detected within 30 mm from the leading edge of the document.
zFor the area in Fig. 1, you can also specify a length (feed direction) in the Software Operation Panel to disable multifeed detection.
For details, refer to "9.6 Settings Related to Multifeed
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