Xerox PHASER 8500 Service Manual page 148

General Troubleshooting
4-18
Wiper Shaft (Continued)
R# Definition
9 CW On average fe.
10 CW On fe ripple.
11 CW Off fe settling
time (sec).
Runs the Media Path Drive train and engages the Tray 1 Pick SAolenoid on
the fly. The Pick Shaft goes through two full revolutions while drive
requirements are determined.
Tray 1 Pick Shaft
R# Definition
0 Off average MP fe.
(mpts).
Typical
Typical Value
Value (8500/
(8400) 8550/8560) Actions
-50 to 15 .02 to .2
20 to 75 0 to .4
-5 to .01 .02 to .22
Typical Typical
Value Value
(8400) (8500/
8550/8560) Actions
800 to 1500
Phaser 8400/8500/8550/8560 Color Printer Service Manual
Reports the average effort
required to rotate the wiper
shaft in the CW 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
needed to rotate the wiper
shaft in the CW direction at a
constant velocity.
A larger value may show
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 wiper shaft load.
A larger value could indicate a
dragging or slow to release
clutch.
Reports the average MP fe
during the run in interval
before the pick shaft is
engaged.