Reversing; Operation - Canon DADF-H1 Service Manual

2.5 Reversing

2.5.1 Operation

The document reversal operation works in two modes: from the first side to the second
side and from the second side to the first side. Since both modes are identical in terms of
the document reversal process, the first to second side reversal operation is described below.
a. First-side pickup
The feed motor (M1) drives the read roller and the platen roller to rotate for scanning the
first side of the document. When the scan is completed, the locking solenoid (SL1) turns on
as the image start signal turns ON, with the delivery reversal roller being locked to deliver
the document to the delivery station.
M1
Platen roller
Read roller
b. Reversal/feed 1
When the trailing sheet of the document fed passes the delivery reversal sensor (PI8), the
feed motor (M1) stops. Then, the feed motor (M1) starts reversing immediately to feed the
document to the registration roller position and then stops, thereby turning off the locking
solenoid (SL1) to unlock the delivery reversal roller.
M1
COPYRIGHT © 2001 CANON INC.
SL1
F02-205-01
Delivery reversal sensor
F02-205-02
2000 2000 2000 2000
CHAPTER 2 OUTLINE OF OPERATION
M1
M1
CANON DADF-H1 REV.0 MAR. 2001
Delivery reversal roller
SL1
SL1
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