Fujitsu Ricoh Fujitsu fi-7700 Document Scanner - Manual (Page 52)

Index
Contents
Chapter 2 How to Load Documents
Appendix
Glossary
Introduction
TOP
52
How to Use the
Operator Panel
Various Ways to
Scan
Daily Care
Troubleshooting
Operational
Settings
Replacing the
Consumables
Scanner
Overview
How to Load
Documents
Conditions for Multifeed Detection
Multifeed is an error where two or more sheets are fed through
the ADF at once. When a different document length is
detected, this detected result is also called a multifeed.
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
 Paper weight: 20 to 413 g/m 2 (5.3 to 110 lb)
 Do not punch holes within 35 mm (1.38 in.) over the center of the
document. See
"Fig. 1" (page 51) .
 Do not attach other documents within 35 mm (1.38 in.) over the
center of the document. See
"Fig. 1" (page 51) .
Detection by Length
 Load documents of the same length in the ADF paper chute (feeder).
 Variance in document lengths: 1% or less
 Do not punch holes within 35 mm (1.38 in.) over the center of the
document. See
"Fig. 1" (page 51) .
Detection by Overlapping and Length
 Load documents of the same length in the ADF paper chute (feeder).
 Paper weight: 20 to 413 g/m 2 (5.3 to 110 lb)
 Variance in document lengths: 1% or less
 Do not punch holes within 35 mm (1.38 in.) over the center of the
document. See
"Fig. 1" (page 51) .
 Do not attach other documents within 35 mm (1.38 in.) over the
center of the document. See
"Fig. 1" (page 51) .
ATTENTION
 The above condition applies when the document is set to the center
of the pick roller width.
 When you use detection by overlapping, scanning thick documents
such as plastic cards will be falsely detected as multifeed. In that
case, specify one of the following settings and try scanning again.
- Use the Intelligent Multifeed function.
- Disable the multifeed detection setting.
- Use the Manual/Single mode.
HINT
 Accuracy of multifeed detection may drop with some documents.
Multifeed cannot be detected for the top 30 mm of a document.
 For the shaded area in "Fig. 1" (page 51) , you can also specify a
length not to detect multifeeds in the Software Operation Panel.
For details, refer to
"8.6 Settings Related to Multifeed Detection"
(page 199) .