Xerox PHASER 8500 Service Manual page 144

General Troubleshooting
4-14
Deskew Shaft (Continued)
R# Definition
3 CCW On average fe. 250 to 600 1.0 to 2.5
4 CCW On fe ripple.
5 CCW Off fe settling
time (sec).
6 Time to CW On
peak fe (sec).
7 CW On peak fe.
Typical
Typical Value
Value (8500/
(8400) 8550/8560) Actions
115 to 360 0 to 2.0
0.010 to 0 to .5
0.20
0.010 to 0 to .05
0.06
-950 to -7.0 to
-450 -2.0
Phaser 8400/8500/8550/8560 Color Printer Service Manual
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.