Xerox 8500DN Service Manual - Page 144
Deskew Shaft, Continued
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UPC - 095205022063
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General Troubleshooting Deskew Shaft (Continued) R# Definition Typical Value (8400) Typical Value (8500/ 8550/8560) Actions 3 CCW On average fe. 250 to 600 1.0 to 2.5 4 CCW On fe ripple. 115 to 360 0 to 2.0 5 CCW Off fe settling 0.010 to 0 to .5 time (sec). 0.20 6 Time to CW On peak fe (sec). 0.010 to 0 to .05 0.06 7 CW On peak fe. -950 to -450 -7.0 to -2.0 Reports the average effort required to rotate the deskew shaft in the CCW direction at a constant velocity. An unusual value could indicate a difference in the composition and/or number of the rollers, the nip pressure, or out of range mechanical dimensions due to wear or contamination (such as paper dust increasing the effective diameter of a roller). Reports the variation of effort required to rotate the deskew shaft in the CCW direction at a constant velocity. A larger value could indicate particles in the gears or non uniform contamination of a roller (causing a lump). Reports the time it takes the MP motor servo system to "settle down" after the sudden release of the deskew shaft load. A larger value can indicate a slow to release or dragging clutch. Reports a time that indicates how long it takes the MP motor servo system to react to the sudden addition of the deskew shaft load. Larger values may indicate a slipping or slow to engage clutch. Reports the peak effort required to accelerate the deskew shaft load. A smaller value could indicate a slipping clutch. 4-14 Phaser 8400/8500/8550/8560 Color Printer Service Manual
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