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4-7
Problems with the Main Part of the Machine
4-7-2 Cover misfeeding sensed incorrectly
Where to check
The double feed
detect sensor is dirty.
4-7-3 Covers double-feeding
Where to check
The covers must be
fanned thoroughly.
The blower air is too
weak.
The position of the
double feed stop pad
is too low.
The feed table is too
high.
The vacuum for the
feed rotor is too
strong.
120
Cause and solution
• Clean the double feed detect sensor.
Upper Sensor
Lower Sensor
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Cause and solution
• Sheets which have been trimmed by a dull
cutter may stick together along their edges.
• Fan the covers thoroughly before placing
them in position.
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• Push in on the blower air adjusting knob to
increase the blower air.
Adjusting Knob
• Check the air filter in the cover feeder.
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• When the double feed stop pad height
adjusting lever is raised to its highest
Adjusting Knob
position (which means that the double feed
stop pad is lowered to its lowest position),
this does not create enough drag on the
covers, sometimes allowing them to feed
together. Lower the double feed stop pad
height adjusting lever. This raises the double
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feed stop pad.
• If the feed table is too high, the covers may
Cover Feed Height Adjusting Knob
be lifted up by the blower air, and two covers
are sometimes fed together.
• Try lowering the feed table.
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• Reduce the vacuum for the feed rotor using
the vacuum setting using the Bookbinding -
Fine-Tune Adjustment - Covers screen.
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Related
item
5-6
Related
item
—
3-15
5-21
3-16
3-17
1-3-2
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