Xerox Phaser 8400 Service Manual

General Troubleshooting 4-39
Drum Maintenance Drive
With the Y-axis rotating, the drum maintenance unit is loaded against the drum for a short time in
each configuration (roller and blade/blade only)
R# Definition
Typical
Value
(8400)
Typical
Value
(8500/
8550) Actions
0 Time to blade first
contact (sec)
.01 to .35 .15 to .4 Reports the time from the load
command to the engine until the
drum indicates blade contact.
1 Time to roller first
contact (sec)
.03 to 045 .2 to .50 Reports the time from the load
command to the engine until the
drum indicates roller contact.
2 Roller/Blade loaded
average Y-axis
following error
(mpts)
-700 to
-250
-650 to
-150
Reports the average Y-axis
following error during the Roll
With Both Loaded interval.
3 Roller/Blade loaded
Y-axis following error
ripple (mpts)
-50 to
300
0 to 600 Reports the difference between
the max and the min Y-axis
following error during the Roll
With Both Loaded interval.
4 Roller Average
Period (sec)
50 to
1600
-.05 to
.05
Reports the average period of
the Y-axis following error ripple
during the Roll With Both Loaded
interval. This variation would be
due to the dmu roller rolling
along the drum surface.
5 Roller Revs 3 to 40 Reports the number of Y-axis
following error ripple peaks
during the Roll With Both Loaded
interval.
6 Roller Disengaged
Time (sec)
-0.001 to
0.05
-.05 to
0.5
Reports the time from the unload
roller command to the engine
until the drum indicates no
further roller contact.
7 Blade loaded
average Y-axis
following error
(mpts)
-160 to
-50
-800 to
-100
Reports the average Y-axis
following error during the Roll
With Blade Loaded interval.
8 Blade loaded Y-axis
following error ripple
(mpts)
-0.001 to
0.50
115 to
900
Reports the difference between
the max and the min Y-axis
following error during the Roll
With Blade Loaded interval.

Xerox Phaser 8400 Specifications

General

Brand	Xerox
Model	Phaser 8400
Category	Printer
Language	English