64
Chapter 3 Advanced Operation
Copyright © 2019 Duplo Corporation All Rights Reserved
When the optical sensor is enabled
• Set the paper [Thickness] to [Thin], when normal operation is performed.
If a double-feed is wrongly detected though the paper thickness is set to [Thin] and no double-feed
occurs in test folding or normal operation, set to [Thick].
• Perform the test folding before you start processing the paper folding.
The machine will not start if test folding is not performed even when the
key is pressed.
When the test folding is performed, the icon changes from
to
.
• When paper shorter than 148.0 mm/5.83 inches is used, the double-feed detection is not performed.
At this time, there is no need to perform test folding.
When paper shorter than 148.0 mm/5.83 inches is used, the icon becomes
.
• The data on paper thickness read by test folding will be cleared by changing the [Thickness] in the
double-feed detection setting. Test fold again when the setting is changed.
• Be sure to perform test folding every time printing materials are changed to different ones
even if the quality and thickness of paper used are the same. Double-feed may not be
detected correctly if processing is started without test folding.
• Double-feed detection may not work properly if printing on paper is uneven or paper is
misaligned.
• Repeat test folding if double-feed occurs on test folding after double-feed detection is set to
on. Double-feed will not be detected correctly if paper is processed with the same settings as
when double-feed is detected on test folding.
When mis-detection occurs
Double-feed or miss-feed may sometimes be detected although the paper is fed normally.
• If false double-feed detection occurs when paper thickness is set to [Thin], repeat test folding after
setting paper thickness to [Thick].
If double-feed is detected mistakenly after selecting [Thick], double-feed detection function cannot be
used. Set the double-feed detection to [OFF].
• If false miss-feeding detection occurs when paper thickness is set to [Thick], repeat test folding after
setting paper thickness to [Thin].
If mis-feed is detected mistakenly after selecting [Thin], double-feed detection function cannot be
used. Set the double-feed detection to [OFF].