Xerox C2424 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 Typical Value Actions 7 Amplitude Ripple (Sun Sum units) MFG Only 8 Max Position Ripple MFG (mpts) Only Reports the ripple in the Sin Sum amplitude values. Excludes the neighborhood of the Home notch (a distance of +/- 50 samples from the Home notch min location. Reports the max variation in the reported delta position between samples over the revolution. 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 Typical Value Actions 0 Drum Normalized FFT Power (none) MFG Only 1 Drum Frequency (hz) 2 Motor FFT Power Ratio (none) MFG Only MFG Only 3 Motor Frequency (hz) MFG Only 4 FFT Power Ratio 1 MFG (none) Only 5 Frequency 1 Frequency (hz) MFG Only 6 FFT Power Ratio 2 MFG (none) Only Reports the normalized FFT power amplitude of the drum frequency. The normalized value is generated by dividing the drum FFT power by 1.0xE13. Reports the current drum frequency. Reports the ration of the FFT power amplitude of the motor frequency to the FFT power amplitude of the drum frequency. Reports the current motor frequency. Reports the ratio of the FFT power amplitude of the most powerful FFT frequency (not including the drum or motor), to the FFT power amplitude of the drum frequency. Reports the frequency of the most powerful FFT frequency (not including the drum or motor). 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. General Troubleshooting 4-41