Canon CR-55 - Manual (Page 44)

40 Using the Scanner
Calibrating Paper Thickness
Depending on the thickness of documents scanned with the CR-55 and the
paper thickness setting, double feeds or feeding errors may occur.
After installing the CR-55 or before scanning documents of a different
thickness, perform the procedure below to confirm that documents are
separated one sheet at a time. If documents do not feed correctly, use the
paper thickness adjustment dial to adjust the size of the gap between the
separation roller and feeding roller. (See p. 42.)
1
Start the Scanning Utility.
Note
For in structions on using the scanning utility, see “Using the Scanning
Utility,” on p. 31. You can also refer to the scanning utility help in the
[Help] menu.