Xerox PHASER 8500 Service Manual page 165

Phaser 8400/8500/8550/8560 Color Printer Service Manual
Drum Maintenance Drive (Continued)
Typical
Value
R# Definition (8400)
4 Roller Average 50 to 1600 -.05 to .05
Period (sec)
5 Roller Revs 3 to 40
6 Roller Disengaged -0.001 to
Time (sec) 0.05
7 Blade loaded -160 to
average Y-Axis -50
following error
(mpts)
8 Blade loaded Y- -0.001 to
Axis following error 0.50
ripple (mpts)
9 Blade Disengaged
Time (sec)
This test drives the Printhead tilt mechanism through one cycle to determine if
it is controllable and operating as expected.
Tilt Drive
Typical
Value
R# Definition (8400)
0 Tilt Engage Cap 10 to 600
Position (min)
1 Pre Standby Peak 325 to
Location () 3100
General Troubleshooting
Typical
Value (8500/
8550/8560) Actions
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.
Reports the number of Y-Axis
following error ripple peaks
during the Roll With Both
Loaded interval.
-.05 to 0.5 Reports the time from the
unload roller command to the
engine until the drum indicates
no further roller contact.
-800 to Reports the average Y-Axis
-100 following error during the Roll
With Blade Loaded interval.
115 to 900 Reports the difference
between the max and the min
Y-Axis following error during
the Roll With Blade Loaded
interval.
-0.05 to 0.05 Reports the time from the
unload blade command to the
engine until the drum indicates
no further blade contact.
Typical
Value (8500/
8550/8560) Actions
50 to 550 Reports the distance from the
cap Home position to the tilt
cam engage point.
-125 to 10 Reports the distance around
the tilt cam from the tilt
engage position to the pre
standby peak.
4-35