Xerox WorkCentre C2424DX Service Manual page 199

Y-axis Encoder (Continued)
Uses the sine and cosine sum data to determine the characteristics of the encoder disk and
encoder sensors.
R# Definition
Amplitude Ripple
7
(Sun Sum units)
Max Position Ripple
8
(mpts)
Y-axis Geometry
Rotates the drum at a constant velocity and samples the Y-axis position. Uses the data to
determine Y-axis motor and drum vibration and the most significant other vibrational frequencies.
R# Definition
Drum Normalized
0
FFT Power (none)
Drum Frequency
1
(hz)
Motor FFT Power
2
Ratio (none)
Motor Frequency
3
(hz)
FFT Power Ratio 1
4
(none)
Frequency 1
5
Frequency (hz)
FFT Power Ratio 2
6
(none)
General Troubleshooting
Typical
Value Actions
MFG Reports the ripple in the Sin Sum amplitude
Only values. Excludes the neighborhood of the
Home notch (a distance of +/- 50 samples from
the Home notch min location.
MFG Reports the max variation in the reported delta
Only position between samples over the revolution.
Typical
Value Actions
MFG Reports the normalized FFT power amplitude
Only of the drum frequency. The normalized value is
generated by dividing the drum FFT power by
1.0xE13.
MFG Reports the current drum frequency.
Only
MFG Reports the ration of the FFT power amplitude
Only of the motor frequency to the FFT power
amplitude of the drum frequency.
MFG Reports the current motor frequency.
Only
MFG Reports the ratio of the FFT power amplitude
Only of the most powerful FFT frequency (not
including the drum or motor), to the FFT power
amplitude of the drum frequency.
MFG Reports the frequency of the most powerful
Only FFT frequency (not including the drum or
motor).
MFG Reports the ratio of the FFT power amplitude
Only of the second most powerful FFT frequency
(not including the drum or motor), to the FFT
power amplitude of the drum frequency.
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