10.7 PAPER FEED AND MISFEED DETECTION TIMING
The registration sensor and the exit sensor are used for misfeed detection. If
the CPU detects a misfeed, the Check Paper Path and the Location
indicators turn on.
Just after the main switch is turned on, the CPU checks these sensors for
any jammed paper.
During the copy cycle, the CPU performs four kinds of misfeed detection. The
following explains jam detection timing for copying A4 sideways paper.
,
(1): Checks whether the registration sensor is actuated within 2.01 seconds
after the
key is pressed.
,
(2): Checks whether the exit sensor is actuated within 4.97 seconds after
the
key is pressed.
,
(3): Checks whether the copy paper has passed through the registration
sensor 7.45 seconds after the
key is pressed.
,
(4): Checks whether the copy paper has passed through the exit sensor
7.80 seconds after the
key is pressed.
NOTE:
,
(1) and
,
(2) are detected from the lead edge of the copy paper.
,
(3) and
,
(4) are detected from the trail edge of the copy paper.
The detection timing for
,
(3) and
,
(4) will vary with the
copy paper size in use.
Start Key
Main Motor
Tray Paper Feed Clutch
Relay Roller Clutch
Registration Clutch
Registration Sensor
Exit Sensor
0
0.10 0.35
0.13
2.09
2.01
4.97
7.45
7.80
(second)
,
(3)
,
(4)
,
(1)
,
(2)
A4 sideways
A219D526.wmf
PAPER FEED AND REGISTRATION 20 December 1996
2-48
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