Aligning The Sheets - Sharp AR-FN8 Service Manual

D.

Aligning the Sheets

The alignment motor (M5S) drives the alignment plates each time a sheet is output, putting
both left and right edges of the sheet in order. The alignment motor is a 4-phase stepping motor.
The position of alignment plate is identified in reference to the number of motor pulses from the
alignment plate home position sensor (PI5S).
The following briefly describes what takes place when the saddle stitching mechanism oper-
ates on two sheets.
1) When the first sheet has been output, the alignment plates butt against the left and right edges
of the stack (first alignment). The alignment plates leave the home position in advance and
remain in wait at points 10 mm from the edges of the stack.
Alignment
2) The alignment plates move away from the edges of the stack over a short distance and then butt
against the edges once again (2nd alignment).
CHAPTER 3 SADDLE STITCHER UNIT BASIC OPERATION
plate
Paper positioning
plate
Figure 3-309
Figure 3-310
Sheets
Alignment
plate
Alignment plate
home position sensor
(PI5S)
3-23