Xerox PHASER 8560MFP, Service Documentation

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10/2006
6-28 Phaser 8510/8560MFP Multifunction Product
Print Engine Check Menu Tests
Initial Issue Diagnostics
Y-Axis Geometry Test
This test measures the dynamic stability of the Y-axis drive system. The test rotates the Drum
at a constant velocity and measures Drum and Y-Axis Motor vibration. A very high motor or
drum peak indicates that the component is unbalanced.
Y-Axis Drive Test
This test checks the dynamic performance of the Y-Axis servo control loop. The test is per-
formed with and without the Transfix Roller loaded on the Drum (i.e. min and max loads). Servo
response parameters under various conditions covering anticipated usage ranges are mea-
sured. Excessive velocity ripple could result in image quality problems due to variations in Y-
Axis pixel placement. Excessive settling times can reduce throughput or result in leading edge
print artifacts.
9 Cosine peak-to-peak average
amplitude (cosine sum units) N/A Reports sum of the absolute values of
the average of the Cosine Sum positive
peak values and the average of the
Cosine Sum negative peak values.
Table 34 Y-Axis Geometry Nominal Values
R# Characteristic Typical Value Result
0 Drum FFT Power (none) N/A Reports the rescaled FFT power ampli-
tude of the drum frequency.
1 Drum Frequency (hz) N/A Reports the current drum frequency.
2 Motor FFT Power Ratio
(none) N/A Reports the ratio of the FFT power
amplitude of the motor frequency to the
FFT power amplitude of the drum fre-
quency.
3 Motor Frequency (hz) N/A Reports the current motor frequency.
4 FFT Power Ratio 1 (none) N/A Reports the ratio of the FFT power
amplitude of the most powerful FFT fre-
quency (not including the drum or
motor), to the FFT power amplitude of
the drum frequency.
5 Frequency 1 Frequency (hz) N/A Reports the frequency of the most pow-
erful FFT frequency (not including the
drum or motor.
6 FFT Power Ratio 2 (none) N/A Reports the ratio of the FFT power
amplitude of the second most powerful
FFT frequency (not including the drum or
motor), to the FFT power amplitude of
the drum frequency.
7 Frequency 2 Frequency (hz) N/A Reports the frequency of the second
most powerful FFT frequency (not includ-
ing the drum or motor).
Table 33 Y-Axis Encoder Nominal Values
R# Characteristic Typical Value Result
Table 35 Y-Axis Drive Nominal Values
R# Characteristic Typical Value Result
0 HAHVN CCW Average fe
(mpts) N/A Reports average following error (fe) dur-
ing the last half of the first steady state
period.
1 HAHVN CCW fe Ripple
(mpts) N/A Reports following error ripple during the
last half of the first steady state period.
2 HAHVN CW Average fe
(mpts) N/A Reports average following error during
the last half of the second steady state
period.
3 HAHVN CW fe Ripple (mpts) N/A Reports following error ripple during the
last half of the second steady state
period.
4 HAHVN Start fe Settle time
(sec) N/A Reports the time following the start of
motion that it takes the following error
value to enter the CCW ripple band.
5 HAHVN Reverse Fe Settle
time (sec) N/A Reports the time following the start of
motion reversing that it takes the follow-
ing error value to enter the CW ripple
band.
6 HAHVN Stop Fe Settle time
(sec) N/A Reports the time following the start of
motion stopping that it takes the following
error value to enter the idle ripple band.
7 HAHVN Delta Print Velocity
Settle Time (sec) N/A Reports the time following the start of
motion that it takes the Y-axis delta
velocity to enter the CCW delta velocity
ripple band.
8 HAHVN Speed/Voltage Ratio
(in/sec/volt) N/A Reports an approximation of the motor
Ke parameter during high speed opera-
tion.
9 HALVN Speed/Voltage Ratio
(in/sec/volt) N/A Reports an approximation of the motor
Ke parameter during low speed opera-
tion.