Xerox VersaLink B7025 Service Manual page 1283

High Capacity Feeder: Loading and Size Sensing
When the HCF tray is pulled out to load paper, the lift gear is separated from the drive gear and
the tray is free to fall to the bottom position. A torque limiter on the lift shaft slows the fall of the
paper tray to prevent damage to feeder components.
Size sensing is determined by the HCF size sensor (A) and the HCF size sensor (B). The
paper tray guides actuate the size sensors,
HCF size sensor
B, (A4)
HCF tray in sensor
Figure 21 HCF tray in and paper size sensors
Table 1 Paper size by sensor state
Tray Paper Size Sensor
Paper Size
Sensor B
B5 LEF or 7.25x10.5 inch LEF OFF
8.5x11 inch LEF OFF
A4 LEF ON
Long A4 (Irregular Settings) OFF
High Capacity Feeder: Tray Lift Operation
When the HCF tray is pushed in and actuates the HCF tray in sensor,
sequence of events occurs, refer to Figure
1. The nudger roll is lowered.
2. The HCF feed/lift motor switches on and rotates CCW to lift the tray through a pulley and
cable arrangement.
3. Lift continues until the paper stack reaches and lifts the nudger roll, deactuating the HCF
level sensor.
4. The HCF feed/lift motor switches off.
Launch Issue
Xerox® VersaLink® B7025/B7030/B7035 Multifunction Printer
Figure 21 and Table 1.
HCF size sensor
A, (letter)
Sensor A
OFF
ON
OFF
OFF
Figure 21, the following
22:
High Capacity Feeder: Remaining Paper Calculation
The control logic calculates the amount of paper that remains in the HCF tray by the time it
takes for the paper stack to deactuate the HCF level sensor,
played on the UI for operator information. Refer to
If the HCF is empty, the HCF no paper sensor will actuate, and a Tray Empty message will dis-
play, Figure 22.
HCF feed/lift motor
Tray
Nudger roll
Table 2 Time/quantity relationship
Paper Remaining
25%
50%
75%
FULL
April 2017
8-37
Figure 22. The value is then dis-
Table 2 for the time/quantity relationship.
HCF level sensor
HCF no paper sensor
Pulley and cable
Figure 22 HCF level sensor
Lift Time (msec)
8798-11526
6068-8797
3338-6067
0-3337
Product Technical Overview