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2) RADF (duplex mode) copy in the SF-A55
START
↓
Step 01:
The transport section is closed. (AUOD ON)
↓
Step 02:
Originals are set on the original tray. (DSD
output: LOW)
↓
Step 03:
Original feed display ON
↓
Step 04:
Print SW ON
↓
(Preliminary
For the first original, dummy paper exit is
paper feed):
performed.
↓
Step 05:
Paper feed motor (DTC) reverse rotation
(Paper
separation belt rotation)
Since the stopper is up, paper is not fed.)
↓
Step 06:
Transport clutch (DTC) ON
↓
Step 07:
Transport motor (DTM) forward rotation
(Transport roller, reverse roller, paper exit
roller rotation)
* A: If there is an original on the original
table in advance, the original is
discharged.
↓
Step 08:
Paper feed solenoid (DFSOL) ON
(The weight plate falls to press the original
onto the semi-circular roller.)
Shutter solenoid (SSOL) ON
(the stopper falls.)
↓
* A
Step 09:
Reverse original sensor (RDD) senses the
rear edge of the discharged original.
(RDD output: LOW)
↓
* A
Step 10:
Transport motor (DTM) rpm falls.
↓
Step 11:
Original fed sensor (DFD) detects the lead
edge of the original.
(DFD output: HIGH)
↓
Step 12:
The original is stopped by the resist roller.
(Resist roller rotation)
The lead edge of the original is taken up by
the resist roller.
↓
Step 13:
The original width sensor (DWS) senses the
original width.
↓
Step 14:
Paper feed motor (DFM) OFF
(The original is stopped with the lead edge
taken up by the resist roller.)
↓
* A
Step 15:
Reverse original sensor (RDD) senses the
rear edge of the discharged original.
(RDD output: HIGH)
↓
* A
Step 16:
Original discharge
↓
Step 17:
Transport motor (DTM) OFF
(Transport roller, reverse roller, paper exit
roller stop)
(Reverse paper feed)
feed
roller,
semi-circular
roller,
↓
Step 18:
Transport motor (DTM) forward rotation
(Transport roller, reverse roller, paper exit
roller rotation)
↓
Step 19:
Paper feed motor (DFM) forward rotation
(Resist roller rotation)
The original is fed to the transport section.
↓
* B
Step 20:
Shutter solenoid (SSOL) OFF
(The stopper rises.)
The paper feed solenoid (DFSOL) OFF
(The weight plate rises.)
* B: If there is no original on the original
↓
Step 21:
Timing sensor (DTD) senses the rear edge of
the original.
(DTD output: HIGH)
↓
Step 22:
Original width sensor (DWS) output LOW
↓
Step 23:
Paper feed motor (DFM) OFF
(Resist roller stop)
↓
Step 24:
Reverse solenoid (DRSOL) ON
(The flapper rises.)
↓
Step 25:
Reverse original sensor (RDD) senses the
lead edge of the original.
(RDD output LOW)
↓
Step 26:
The original lead edge is directed toward the
reverse direction by the flapper.
↓
Step 27:
Transport motor (DTM) OFF
(Transport roller, reverse roller, paper exit
roller stop)
↓
Step 28:
Transport motor (DTM) reverse rotation
(Transport roller, reverse roller, paper exit
roller rotation)
The original is fed in the paper feed direction.
↓
Step 29:
Reverse original sensor (RDD) senses the
rear edge of the reversed original.
(RDD output : HIGH)
↓
Step 30:
The original is stopped by the original
stopper.
Transport motor (DTM) OFF
(Transport roller, reverse roller, paper exit
roller stop)
↓
Step 31:
Reverse solenoid (DRSOL) OFF
(The flapper falls.)
↓
Step 32:
Brake clutch (DTBC) ON
↓
Step 33:
Brake clutch (DTBC) OFF
↓
Step 34:
Transport clutch (DTC) OFF
– 10 –
tray, the stopper and the weight plate
are lifted.
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