Canon 1730, Service Manual

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Technical Explanation > Pickup Feed System > Controls > Reverse/Duplex Assembly
Technical Explanation > Pickup Feed System > Controls > Reverse/Duplex Assembly
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Reverse/Duplex Assembly
● Reverse Flapper Operation
The Reverse Flapper behaves in accordance with the Reverse Feed Solenoid (SL2).
• When Reverse Feed Solenoid (SL2) is OFF: Feed to the Delivery Outlet
• When Reverse Feed Solenoid (SL2) is ON: Feed to the Reverse Mouth
Reverse Flapper
SL2
●
Duplex Reverse Control
Paper is reversed outside the machine using the Reverse Mouth.
The paper is fed to the duplex reverse stop position (it stops at 25mm from the trailing edge
of paper) by using the Reverse Sensor (PS6) as a reference. Then, reverse operation starts.
PS6
M4
Reverse Roller
Duplex Reverse Stop Position
25 mm
F-2-100
F-2-101
● Duplex Re-pickup Control
If it is possible to secure necessary paper interval by estimating the paper interval with the
preceding paper when the Duplex Feed Sensor (PS8) is ON, the paper is re-picked up to the
pre-registration.
If the necessary paper interval cannot be secured, the paper stays at the duplex standby
position (58mm downstream from the Duplex Lower Roller). After recalculated standby time
has passed, re-pickup is executed.
Duplex feed roller 1
PS8
58 mm
Duplex feed roller 2
Duplex Standby Position
M7
● Duplex Circulation
The following shows the number of circulating sheets at the 2-sided print.
Length in paper feed direction Number of circulating sheets
320mm or less 3
321mm or more 2
F-2-102
T-2-47