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For Duplex printing, the paper travels further into the duplex path to a "dup point." At this posi-
tion, the paper has passed a second Mylar gate. The copy reverses direction, driven by the
Duplex Inverter Roll, and the Mylar gate guides the paper to the Dup Path. Two sets of pre-
alignment rolls (Duplex In Roll and Duplex Path Roll) drive the copy, while three sets of crossed
rolls (Alignment Rolls 1, 2 and 3) push the copy into the Side Guide Rail for alignment prior to
copying on the second side.
Duplex Out Rolls transport the copy to the Preregistration Rolls. From there, the copy is again
de-skewed and sent for copying on the second side by passing through the IBT, Fuser and then
exiting the machine as a finished duplex copy.
Refer to
Table 1
for information on the different drive motors used to transport the paper
through the machine.
Table 1 Paper Transport Motors
Motor
Trays 1-4 Feed/Lift Motors
•
24 VDC
•
Bidirectional Stepper Motor
•
300 mm/sec (feed operation)
Take Away Motor
•
24 VDC
•
450 mm/sec.
Tray 5 Motor
•
24 VDC
•
220 mm/sec.
•
130 mm/sec.
•
60 mm/sec.
Tray 5 Lifter Motor
•
24 VDC
•
Stepper Motor
Regi Motor
•
24 VDC
•
Stepper Motor
•
220 mm/sec.
•
130 mm/sec.
•
60 mm/sec.
Invert Motor
•
24 VDC
•
Reversing Stepper Motor
•
350 mm/sec.
•
450 mm/sec.
Principles of Operation
Overview
Function
(drives the following:)
•
Feed Roller (ccw)
•
Nudger Roller (ccw)
•
Paper Level Lift (cw)
•
Take Away Clutch
–
Take Away Rollers 2-4
•
Tray 5 Feed Clutch
–
Nudger Roll
–
Feed Roll
•
Tray 5 Take Away Roll
•
Take Away Feed Clutch
–
#1 Take Away Roll
•
Pre-Registration Roll
•
Tray 5 Lifter-Up
•
Tray 5 Lifter-Down
•
Registration Roll
•
Invert Roll 1
•
Invert Roll 2
•
Dup Invert Roll
•
Dup In Roll
•
Dup Path Roll
Table 1 Paper Transport Motors
Motor
Duplex Out Motor
•
24 VDC
Exit Motor
•
+/- 24 VDC
1/05
10-100
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Function
(drives the following:)
•
Align Roll 1
•
Align Roll 2
•
Align Roll 3
•
Dup Out Roll
•
Machine Exit Inverter Roll
•
Pressure Roller Cam
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DocuColor 12/DCCS50
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Troubleshooting
