PAPER FEED
B234/B235/B236/D101/D102/D103 6-136 SM
The amount of light received by the double-feed sensor is referred to a lookup table
that stores the values of the translucence of paper types.
Double-feed check. The translucence of the paper at the registration roller is
compared to the reading of the previous sheet. If the translucence of the sheet at
the registration rollers is less than that of the previous sheet (greater opacity), the
CPU determines that a double-feed has occurred and stops the job.
UP Mode Settings
The operator can select "Double-Feed Detection" in the Operator Tools (UP) mode
for each paper feed station (default: ON).
[User Tools/Counter]> Adjustment Setting Operators> SP 1908 Double-Feed
• SP1908 001-007: Double feed detection. Enables/disables double-feed
detection for the paper feed sources (trays 1 to 3), the LCT (trays 4 to 6), and
bypass tray (tray 7).
• SP1908 008: After double-feed detection. Auto continue or jam selection after
double-feed detection
Double-feed detection does not operate when feeding paper shorter than 160 mm
from the from the bypass tray.
For slip sheet mode, the tray that contains the slip sheets must be set to ‘OFF’ with
the user tools for "Double-Feed Detection".
The measurements from the double-feed sensor are reset when:
• The machine is switched off and on.
• The tray is set.
• Paper is set in the bypass tray.
• The front door is opened and closed
• The rear fence return sensor in the left tandem tray activates.
• The double feed sensor correction is done. (This is done automatically by the
machine at a set interval.)
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