Canon DR-4080U - Manual (Page 30)

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Operating the scanner
Using the ADF
With the ADF you can load and scan a stack of document pages for continuous scanning. Before you use
the ADF, however, you should know about the following recommendations and restrictions.
ADF loading guidelines
Check the stack of sheets before you load it in the ADF and follow these recommendations:
• If the document pages are very thin, use the flatbed, not the ADF.
• For thin, thick, or extremely fragile documents, scan with the flatbed or use manual feed with the ADF. ( ➞ 32)
Remove each document from the scanner as it is scanned.
• The ADF can accept paper for scanning within the following ranges:
0.06 to 0.15 mm Continuous scanning
0.05 to 0.15 mm Single page scanning
• The ADF can be used with document sizes ranging from A6 to A3.
• Never load more than 200 sheets at a time in the ADF or set the documents so that they exceed the load limit mark
( ➞ 30).
• After straightening thin, folder, creased, or curled documents for scanning with the ADF, set the scanning speed to
slow. ( ➞ 19)
• With some types of documents, the original page order may be lost if some scanned sheets are stacked at the exit
slot and are pushed out by following scanned sheets so that they fall from the exit slot.
• Always use the flatbed for scanning carbon paper or other paper treated specially for copying.
• After you load the stack in the ADF, make sure the top of the stack is not higher than the load limit mark embossed
on the scanner.
• When document feed is stopped by double-feed or skewed feed detection, verify that pages scanned to that point
have been properly stored.
• Note that skewed document feed and double feeding are more likely to occur when feeding pages of mixed sizes.
• Always remove scanned documents from the document cover.
• If the scanner does not scan a document in the hopper which is black or very dark on the opposite side, add a
white sheet of plain paper under the sheet.
• When scanning a stack of different size sheets or sheets longer than A3 size, the original pages could get out of
order if some scanned sheets are stacked at the exit slot.
• When you set the originals for scanning, make sure that the document guide is not set too tight, causing the stack
to bend.
• Regardless of document size or paper type, always use the flatbed if there is any possibility that feeding docu-
ments through the ADF might damage images or documents being scanned.
Documents you should never load in the ADF
Never attempt to load the following items in the ADF for continuous feed to the scanner.
• Never load items of odd composition like OHP film or transparencies, plastic film, photographs, cloth, metallic
sheets, etc.
• Never load paper with any kind of fastener or attachment such as tabs, strings, staples, etc.
• Never load a sheet that contains pasted up layout, dried paste, wet ink, etc.
• Never load envelopes in the ADF.
• Never load any type of nonstandard paper that has been treated chemically for a special purpose like carbon
paper or forms chemically treated for duplication. Scanning chemically treated paper cause premature wear in the
paper feed rollers.
• Never load tracing paper or any other kind of paper that is folded wrinkled, curled, or shaped unusually.
• Never load perforated documents or multipart forms.
Note: If you must scan any of these items, use the flatbed.