Dadf Drive Component Locations; Dadf Sensor Locations - Xerox DocuColor 12/DCCS50 Service Manual

Feed Roll
Upper Duplex Roll
Retard Roll
Belt Drive Roll
Registration Roll
Registration Pinch Roll
Lower Duplex Roll
Figure 1 DADF Drive Component Locations
SIZE SENSORS TOP COVER INTERLOCK
(F and R) SWITCHES (F and R)
DOCUMENT
DUPLEX
REGISTRATION
SENSOR
SENSOR
SENSOR
Figure 2 DADF Sensor Locations
Principles of Operation
DADF Document Transport
Exit Roll
Nudger Roll
Belt Idler Roll
Pinch Rolls
EXIT
SENSOR
DADF OPEN-
SWITCH (R)
Drive Motors
Table 1 DADF Motor Driven Rolls
Motor Rolls
Feed Motor Nudger Roll (cw)
+ 24 VDC
Feed Roll (cw)
Belt Motor Registration Rolls
+24 VDC Stepper
Belt Drive Rolls
Bi-directional
Lower Duplex Roll
Upper Duplex Rolls
Exit Motor Exit Rolls
+24 VDC Stepper
Feed Motor
The Feed Motor is controlled by the DADF Control PWBA and turns the Nudger and Feed
Rolls. The Nudger Rolls feeds the top sheet into the nip of the Feed and Retard Roll. The Feed
Roll turns against the Retard Roll, which drags against sheets below the top and prevents pre-
vent multiple sheet feeds.
The Feed Motor is energized 200 msec. after the user presses the Start Button. The Feed Roll
takes the top document in the stack and transports it into the nip of the stationary Registration
Rolls. The Feed Motor deenergizes 50 msec.after the trailing edge of the document passes the
Registration Sensor.
The DADF Control PWBA does not energize the DADF Feed Motor unless the following safety
interlock switches are closed:
• The Platen Interlock is closed by lowering the DADF onto the Platen Glass.
• Two Top Cover Interlocks are closed by closing the top cover on the left side of the DADF.
Belt Motor Drive
The DADF Belt Motor is a +24 VDC, bidirectional stepper motor. This motor drives these roll-
ers:
• Registration Roll
• Belt Roll
• Lower Duplex Roll
• Upper Duplex Roll
1/05
10-60
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Transport Speed Transport Speed
(Forward - ccw) (Reverse - cw)
223.9 mm/sec
268.7 mm/sec
810.6 mm/sec
806.0 mm/sec 873.7 mm/sec
671.7 mm/sec
873.7 mm/sec
when re-inverting
for exit stacking
only
671.7 mm/sec
873.7 mm/sec
when re-inverting
for exit stacking
only
840.2 mm/sec
Reissue
DocuColor 12/DCCS50