Xerox Phaser 8560MFP Service Documentation page 229

NOTE: The test requires that the tray be cycled (pulled out and pushed in) and emptied. How-
ever there are no sensors to detect if the required actions were taken. The test runs with the
tray in any state, but the results are less useful if the tray is not in the required configuration.
The power peaks indicate when swing gears loose contact on one side (cutting the required
power), and then making contact on the other side and accelerating the upper shafts in the
other direction.
Table 32 Tray 2, 3, and 4 Lift Plate Drive Nominal Values
R# Characteristic Typical Value
0 Tray Configuration N/A
1 Start Peak Power (watts) N/A
2 Slack Take-up Time (sec) N/A
3 Average Lift Power (watts) N/A
4 Lift Contact Time (sec) N/A
5 Lift Time (sec) N/A
6 Stall Power (watts) N/A
Drum Menu
The Drum menu contains tests for different aspects of Drum operation and the Y-Axis sub-
system.
Initial Issue
Phaser 8510/8560MFP Multifunction Product
Result
Reports the tray status (present, plate
not lifted, etc.).
Reports the highest peak during the first
quarter of the lifting interval. Peak power
is a characteristic of the motor, and
shows the power required to begin mov-
ing.
Reports the time interval between motor
power on and when lifting actually starts.
Reports the average power during the
lifting interval. This is power required to
lift the plate. This value is affected if the
tray is missing, not empty, or problems
with the lift arm (missing sleeve bear-
ings, etc.).
Reports the interval from the motor start
time until the required lift power starts to
increase due to the initial contact with
the Nudger Roller. This value indicates
the point of contact with the Nudger
Roller. which indicates if the roller is
installed and is hanging down correctly
Reports the interval from the motor start
time until the Paper Height Sensor is
activated. This value indicates that the
sensor is working and is encountered at
the correct spot in the lift profile. This
value is also be affected if the tray con-
tains media.
Reports the average motor stall power
during the over lifting interval. ·Stall
power is a characteristic of the motor.
Y-Axis Encoder Test
This test gathers data on the performance of the Y-axis Encoder and Home position reporting.
The Y-Axis encoder subsystem (consisting of the data gathering hardware and the firmware), is
very tolerant and operates correctly with a wide range of data. Most data issues are related to
encoder disk misalignment, damage, or contamination.
Table 33 Y-Axis Encoder Nominal Values
R# Characteristic
0 Sin DC offset (sin sum units) N/A
1 Sin peak-to-peak average
amplitude (sin sum units)
2 Sin amplitude ripple Ratio
(none)
3 Sin max delta amplitude (sin
sum units)
4 Sin max delta position (Y-
Axis encoder ticks)
5 Home Notch Depth Ratio
(none)
6 Home Notch Width (Y-Axis
encoder ticks)
7 Home Notch Symmetry
(none)
8 Cosine DC offset (cosine
sum units)
10/2006
6-27
Typical Value Result
Reports one half of the difference
between the average of the Sin Sum
positive peak values and the average of
the Sin Sum negative peak values.
N/A Reports sum of the absolute values of
the average of the Sin Sum positive peak
values and the average of the Sin Sum
negative peak values.
N/A Reports difference between the Sin
amplitude ripple (the difference between
the max and min Sin Sum positive peak
values over a revolution ignoring a short
distance each side of the notch), and half
the peak to peak Sin Sum average
amplitude (R1 / 2).
N/A Reports max value of the difference
between the amplitudes of any adjacent
Sin Sum positive peaks.
N/A Reports max value of the difference
between the rotational position of any
adjacent Sin Sum positive peaks.
N/A Reports the ratio between the notch bot-
tom amplitude measured with respect to
the Sin DC offset (R1), and one half the
peak to peak average amplitude value
(R1 / 2), as determined from the Sin Sum
data.
N/A Reports the width of the Home notch at
99% full depth as determined from the
Sin Sum data.
N/A Reports the ratio of the portions of the
Home notch width distance as bisected
by a vertical from the notch min as deter-
mined from the Sin Sum data.
N/A Reports difference between the average
of the Cosine Sum positive peak values
and the average of the Cosine Sum neg-
ative peak values.
Print Engine Check Menu Tests
Diagnostics