Specifications

9. DUPLEX PAPER FEED AND MISFEED
DETECTION TIMING
The duplex entrance sensor and the duplex turn sensor monitor the
movement of the paper through the paper path in duplex mode. If the duplex
CPU determines that a misfeed exists, the duplex CPU sends a misfeed
signal to the copier CPU through the interface board, and the Check Paper
Path and the Misfeed Location indicators turn on. When the main switch is
turned on, the CPU checks these two sensors for initial misfeed. During the
first side copy cycle, the duplex CPU performs three kinds of misfeed
detection:
J1: Checks whether the duplex entrance sensor is actuated within 1,110
pulses (about 4.4 seconds) after the registration clutch turns on. (The
Misfeed Location indicator "D" turns on.)
J2: Checks whether the duplex turn sensor is actuated within 1,315 pulses
(about 5.3 seconds) after the registration clutch turns on. (The Misfeed
Location indicator "E" turns on.)
J3: Checks whether the copy paper passes through the duplex entrance
sensor 525 pulses (2.1 seconds) after the duplex turn sensor has been
actuated. (The Misfeed Location indicator "E" turns on.)
In the second side copy cycle, the misfeed detection timing is same as the
one in the second feed station copying.
0 1750 2000 2500 3000 3500 4000 4500 5000 5500
1750 1750
2000 2000
50 m sec 50 m sec
2100 m sec 2100 m sec
3425
3425
31103110
200 m sec
450 m sec
J1 J1
J3
J2 J2
J3
2000
2075
1750
Timing Pulse
(4 m sec/pulse)
Start Key
Main Motor
1st Feed Clutch
Registration
Jogger Motor
Duplex Entrance
Duplex Turn
Sensor
Sensor
Clutch
Duplex Gate
Duplex Feed
Motor
Sol.
1 December 1990
10-11