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2) SF-A57 RADF mode (duplex copy mode) copying
START
↓
Step 01:
The transport section is closed. (AUOD ON)
↓
Step 02:
An original is set on the original tray. (DSS
output HIGH)
↓
Step 03:
Original feed display ON
↓
Step 04:
Print SW ON
↓
* A: For the first original, dummy paper exit
(Preliminary
paper feed):
is performed.
↓
* A
Step 05:
Paper feed motor (DFM) forward rotation
(Paper feed roller, semi-circular roller rotation)
Since the stopper is up, paper feed is not
performed.
↓
Step 06:
Reverse motor (DRM) forward rotation
(Reverse roller, paper exit roller rotation)
↓
Step 07:
Transport motor (DTM) rotation
(Transport belt rotation)
* B: If there has been an original on the
tray, is discharged.
↓
* A
Step 08:
Paper feed motor (DFM) OFF
Paper feed solenoid (DFSOL) ON
(The weight plate and the stopper move down
to press the original onto the semi-circular
roller.)
↓
Step 09:
Paper feed motor (DFM) forward rotation
(Paper feed roller, semi-circular roller rotation)
The original feed is started.
↓
* B
Step 10:
Reverse sensor (RDD) senses the lead edge
of the discharged original.
(RDD output HIGH)
↓
Step 11:
Original feed sensor (DFD) senses the lead
edge of the discharged original. (DFD output
HIGH)
↓
Step 12:
Paper feed motor (DFM) OFF
The original is stopped by the resist roller.
↓
Step 13:
Paper feed motor (DFM) reverse rotation
(Resist roller rotation)
The lead edge of the original is taken up by
the resist roller.)
↓
Step 14:
Original width sensor (DWS) senses the
original width. (Output LOW)
↓
Step 15:
Original timing sensor (DTD) senses the lead
edge of the original. (DTD output HIGH)
↓
Step 16:
Paper feed motor (DFM) OFF
(The original is stopped with its lead edge
taken up by the resist roller.)
↓
* B
Step 17:
Reverse sensor (RDD) senses the rear edge
of the discharged original. (RDD output LOW)
Reverse motor (DRM) rpm down
↓
Step 18:
Transport motor (DTM) OFF
(Transport stop)
↓
* B
Step 19:
Original discharge
↓
Step 20:
Reverse motor (DRM) OFF
(Reverse roller, paper exit roller stop)
(Paper feed reverse)
↓
(Preliminary
paper feed):
↓
Step 21:
Transport motor (DTM) forward rotation
Transport
forward rotation (Reverse roller, paper exit
roller rotation)
↓
Step 22:
Paper feed motor (DFM) reverse rotation
(Resist roller rotation)
The original is sent to the transport section.
↓
Step 23:
Original feed sensor (DFD)
Senses the rear edge of the discharged
original. (DFD output LOW)
↓
* C Step 24:
Paper feed solenoid (DFSOL) OFF
(The weight plate and the stopper move up.)
* C: If there is no original on the original
↓
Step 25:
Original width sensor (DWS) output HIGH
↓
Step 26:
Original timing sensor (DTD) senses the rear
edge of the original.
(DTD output LOW)
Paper feed motor (DFM) OFF (Resist roller
stop)
Reverse solenoid (DRSOL) ON (The flapper
move up.)
↓
Step 27:
Reverse sensor (RDD) senses the lead edge
of the original. (RDD output HIGH)
↓
Step 28:
The lead edge of the original is moved
counterclockwise by the flapper.
↓
Step 29:
Transport motor (DTM) OFF
(Transport belt stop)
↓
Step 30:
Reverse motor (RDM) OFF
(Reverse roller, paper exit roller stop)
– 9 –
motor,
reverse
motor
tray, move up the stopper and the
weight plate.
(DRM)
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