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3) The second copy is laid over the first copy and, at the same time, the third copy arrives from the

host machine.

First copy Second copy

Third copy

4) The first, second and third copies are simultaneously pulled into the stapling tray.

Second copy

Third copy

First copy

The third copy as explained here is moved through buffer paper path 1. This fact is omitted from the
discussion to avoid interrupting the sequence of operations.

The finisher moves copies arriving from the host machine to the delivery tray, stapling tray, or

the saddle stitch unit (Saddle Finisher) according to the mode of delivery. On the stapling tray, the
copies are subjected to job offset or stapling as instructed by the host machine.

The first feed motor (M1), second feed motor (M8) and inlet feed motor (M9) are stepping

motors, and delivery motor (M2) is a DC motor. These motors are controlled by the microprocessor
(CPU) on the finisher controller PCB, and rotate either clockwise or counterclockwise.

The paper paths are equipped with the following four sensors for detection of paper (arrival,

passage):

●

Inlet sensor (PI1)

●

Delivery sensor (PI3)

●

Stapling tray sensor (PI4)

●

Buffer path paper sensor (PI14)

In addition, each delivery tray is equipped with a sensor designed to detect the presence/ab-

sence of paper on it.

●

No.1 tray paper sensor (PI11)

●

No.2 tray paper sensor (PI12)

If a copy fails to reach or move past each sensor within a specific period of time, the finisher

controller PCB identifies the condition as a jam, and stops the ongoing operation, and at the same
time, informs the host machine of the condition. When all doors are closed after the paper jam is
removed, the buffer path inlet paper sensor (PI17) checks whether or not copies are being detected
in addition to the above four sensors (inlet sensor, delivery sensor, stapling tray sensor and buffer
path paper sensor). If the sensors detect a copy, the finisher unit judges that paper jams have not
completely been removed, and sends the paper jam removal signal to the host machine again.

SL3

SL2

SL1

SL7

M6

M2

M7

PI20

SL6

M4

PI10

PI24

PI23

PI9

PI19

M1

M8

M9

M3

SL5

M5

M10

Escape solenoid dri

v

e signal  ESCPSL

T

ray 2 lift motor dri

v

e signal

Shift motor clock signal 1 SFTCLK 21

Shift motor clock signal 2 SFTCLK 22

Alignment motor dri

v

e signal

Deli

v

ery motor dri

v

e signal

Deli

v

ery motor clock signal  DELCLK

Swing motor dri

v

e signal

Swing motor clock signal  SWGCLK

Shift motor clock detection signal 1  SFTCLK11

Shift motor clock detection signal 2  SFTCLK12

P

addle solenoid dri

v

e signal  PDLSL

Second feed motor dri

v

e signal

First feed motor dri

v

e signal

Inlet feed motor dri

v

e signal

Buf

fer outlet solenoid dri

v

e signal  EXITSL

Buf

fer inlet solenoid dri

v

e signal  EXTSL

Flapper solenoid dri

v

e signal  FLPSL

Belt escape solenoid dri

v

e signal  BESCPSL

Stapler motor dri

v

e signal

Stapler shift motor dri

v

e signal

Finisher controller PCB

T

ray 1 lift motor dri

v

e signal

PI1

PI14

PI17

PI4

PI3

PI11

PI12

 No. 2 tray paper detection signal  SNDTRA

Y

No. 1 tray paper detection signal  FSTTRA

Y

Stapling tray paper detection signal  STPTY

Buf

fer path paper                   

detection signal  B

UFP

ASS

Deli

v

ery detection signal  PDEL

Buf

fer path inlet paper                     

detection signal  B

UFENTR

Inlet paper detection signal  PENT

Finisher controller PCB