Controlling The Movement Of Sheets - Sharp AR-F15 Service Manual

C.

Controlling the Movement of Sheets

When the leading edge of a sheet has moved past the inlet flapper, the intermediate feed roller
and the crescent roller start to move the sheet forward.
The intermediate feed roller is normally not in contact with the path bed. When the leading
edge of a sheet reaches the intermediate feed roller contact section, the feed plate contact solenoid
(SL4S) causes the roller to come into contact with the path bed so as to move the sheet. The contact
is broken as soon as the leading edge of the sheet reaches the paper positioning plate. This series of
operations is executed each time a sheet arrives.
When the leading edge of the first sheet reaches the paper positioning plate, the paper position-
ing plate paper sensor (PI8S) turns ON. The arrival of the second and subsequent sheets will not be
checked since the first sheet will still be over the sensor.
The crescent roller keeps rotating while sheets are being output, butting the leading edge of
each sheet against the paper positioning plate, and ultimately, keeping the leading edge of the stack
in order.
The alignment plate motor (M5S) drives the alignment plates for each sheet so as to put both
left and right edges of the sheet in order.
1) The solenoid turns ON while paper is being moved so that the feed plate comes into contact.
CHAPTER 3 SADDLE STITCH UNIT BASIC OPERATION
Intermediate feed roller
Feed motor
M1S
Figure 3-306
ON
SL4S
Feed plate contact
solenoid
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