MX-FNX2 (serv.man7). Section 5 - Operational Descriptions . - Sharp Copying Equipment Service Manual (repair manual). Page 12

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MX-FNX2/AR-PN1/MX-RBX1  OPERATIONAL DESCRIPTION  5 – 12
E. Fold/Delivery System
(1) Outline
The paper fold mechanism consists of a guide plate, paper fold roll-
ers, and a paper pushing plate.
The guide plate, paper fold rollers, and paper pushing plate are
driven by the staple motor (FFSM). The drive force is transferred
with a combination of gears and cams. Motor operation is moni-
tored by the binding lock sensor (FFE).
Until the paper stack reaches the folding position, the guide plate
covers the paper fold rollers to act as a paper path through which a
paper stack is fed to the saddle unit and to prevent a paper stack
from touching the rollers.
A binding home position sensor (FFHPD) is provided to detect the
positions of the paper fold rollers and paper pushing plate.
The paper stack folded in two by the paper fold rollers is delivered
by bind delivery rollers. The bind delivery rollers are also driven by
the staple motor (FFSM).
A bind tray sensor (FFED) is provided on the bind tray to detect
presence/absence of a paper stack; however, it is not used to
detect a jam.
(2) Paper Folding
Paper is folded using paper fold rollers and a paper pushing plate. 
Almost concurrently with the start of roller rotation, the paper push-
ing plate starts operating to push the paper stack into the gap
between the paper fold rollers. When the paper stack is fed about
10 mm with the rotation of the paper fold rollers, the paper pushing
plate returns to the home position. Then, the paper stack is deliv-
ered to the bind tray using the paper fold rollers and bind delivery
rollers. 
Half the entire surface of each paper fold roller is uncovered
excluding the central area and the area at the left and right ends.
The uncovered surface of the upper paper fold roller comes in
touch with the uncovered surface of the lower paper fold roller only
at the center and left and right ends, allowing a paper stack to be
fed without causing creases. The other half of the upper paper fold
roller that is covered comes in touch with the other half of the lower
paper fold roller that is also covered, allowing a paper stack to be
folded while being fed.
FFSM
Paper fold roller (lower)
Paper fold roller (upper)
Staple motor
(FFSM)
Paper pushing plate
Bookbinding home position
sensor (FFHPD)
Sensor flag
Came
Paper stack
FFSM
Paper fold roller (lower)
Paper fold roller (upper)
Staple motor
(FFSM)
Bookbinding home position
sensor (FFHPD)
Paper pushing plate
Paper stack
Folds/feeds a paper stack.
Feeds a paper stack.
Outlet
Inlet
Paper push plate
Paper stack
Feed motor (FFM)
Bundle exit motor (FAM)
Paddle motor (FPM)
Paddle home position
sensor (FPDHPD)
Bundle roller home position
sensor (FARHPD)
Staple safety switch
(FSSSW)
Staple shift motor (FSM)
Staple motor (FFSM)
Staple drive home position
sensor (FSHPD)
Bookbinding position
sensor (FFPD)
Bookbinding roller home
position sensor (FFRHPD)
Bookbinding clutch (FFC)
Bookbinding home
position sensor (FFHPD)
Bookbinding paper
sensor (FFED)
: CW rotation
: CCW rotation
50msec
Staple
Fold, Delivery
13571msec
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