Xerox DocuColor 12/DCCS50, Service Manual

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1/05
10-104 DocuColor 12/DCCS50
Vertical Transport, Tray 5
Reissue
Principles of Operation
Vertical Transport
The purpose of the Vertical Transport module is to provide copy transportation from the Paper
Trays to the registration system. The vertical Transport also provides access to the paper jams
in the Paper Feeders and Take Away Rolls (TAR).
As paper is feed from the Paper Trays, it enters the Vertical Transport module. The Take Away
Rolls 2 through 4 are individually clutched magnetically and are driven by the Take Away Motor.
Paper transport speed is at 450 mm/sec. Each TAR clutch can engage or disengage from the
TAR Motor as the paper enters and leaves the nip. This function reduces the energy used by
the TAR Motor and also releases the paper as required when the paper enters the variable
speed Preregistration Rolls.
The Take Away Roll 1 is clutch driven by Tray 5 Motor at 450 mm/sec. These rolls are also elec-
tromagnetically clutched to disengage from the Tray 5 Motor. These rolls disengage when the
paper enters the nip of the Preregistration Rolls.
An optical Feed Out Sensor at each TAR reads the lead and trail edge of the paper to energize
the clutched rolls and to detect paper jams at each of Paper Trays.
Tray 5
Tray 5 is used to feed copy material that cannot be reliably fed from one of the four Paper Trays,
or for a copy size that is not available in any of the Paper Trays. Copy material that is to be fed
from Tray 5 includes:
• Transparency material
• Heavy weight paper (105 gsm - 190 gsm)
• Extra heavy weight paper (191 gsm - 250 gsm)
• Manual duplex copy needs
• Multi-hole drill/punched paper
Tray 5 feed operation
Tray 5 has a switch that is activated when the top of the tray is dropped down. This sends a sig-
nal to the machine run control, which energizes the Tray 5 sensor circuitry and indicates on the
User Interface screen that the Tray 5 is open.
When copy material is placed in Tray 5 with the lead edge of the material against the Tray 5
Gate, a Paper Set Sensor is actuated. This sensor signals machine run control that copy is
present in this tray. A paper Size Guide is manually adjusted to accommodate the lead edge
dimension of the copy. The Size Guide uses a variable resistor sensor for providing the lead
edge dimension to the machine run control.
Two optical sensors are used to monitor the copy stack height that is placed in Tray 5 for proper
feeding into the machine:
• Tray 5 Level Up Sensor - This sensor performs the same way as the Stack Height Sen-
sor in Paper Trays 1-4. When the Nudger Roll has to drop too far down to reach the top
sheet of paper, the Tray 5 Level Up Sensor is unblocked and the Tray 5 Lifter motor is
energized counterclock wise to raise the Paper Lifter, bring the paper level up to the
Nudger Roll for proper feeding.
• Tray 5 Level Down Sensor - This sensor indicates when the Paper Lifter is down. The
Tray 5 Lifter Motor is energized clockwise to lower the paper.
A delayed time interval from the TR0 signal starts the Tray 5 Motor. The Nudger Roll Solenoid
momentarily energizes to lower the Nudger Roll to the top copy. This feeds the top copy into
the nip of the Feed Roll and the Retard Roll. The Retard Roll has a friction clutch which pro-
vides resistance to prevent multiple copy feedings (See
Retard Roller Operation
for more
details of this roller function.)
The copy travels from Tray 5 Feed/Nudger Rolls to the Tray 5 Take Away Rolls. The Tray 5 Feed
Sensor detects the lead and trail edge. If the lead edge is not sensed within the designated
time, then a paper jam error is generated.
The Tray 5 feed mechanism is similar to that used in Paper Trays 1-4 (See Paper Feeders for
more information on paper feeding). Tray 5 Nudger Roll feeds the paper to the nip of the Feed
and Retard Roll. The Retard Roll is a semi-active type. From there, the single sheet of paper is
fed to the Tray 5 Take Away Rolls.
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