Xerox Phaser 8400 Service Manual page 186

Stripper Contact
This test holds the drum stationary while the stripper solenoid is activated and released. The
drum servo error signal illustrates activation/deactivation timing and how strongly the drum was
contacted by the blade.
R# Definition
0 Engage
Displacement (mpts)
1 Engage Time (sec)
2 Engaging Period
(sec)
3 Engaging Amplitude
(mpts)
4-46
Typical Typical
Value Value
(8400) (8500/
8550)
-10 to 2 -15 to 8.0
.0030 to 0 to .05
.0035
0 to 0.11 0 to .3
3 to 18 5.0 to 35
Phaser 8400/8500/8550 Color Printer
Actions
Reports the static difference
between the average ya_fe
before and after the blade
contacts the drum, indicating how
strongly the blade is interacting
with the drum while pushing onto
the drum.
May be an indication as to the
condition of the blade (stiffness,
dirty, bent, delaminated, etc.).
Another potential factor could be
the solenoid range of travel or
engagement force (solenoid/
solenoid drive strength or return
spring strength).
Reports time between
engagement of the stripper
solenoid and initial contact
between the blade and the drum.
May indicate the geometry of the
mechanism, such as parts out of
tolerance, mis-assembled, or
bent, causing an incorrect blade
to drum gap.
Reports time between stripper
solenoid engagement and the
point when the reaction of the
drum to the contact of the blade
fades back into the ripple (noise).
Another indication of blade to
drum interaction. The profile
shape (R2/R2) could be a
dynamic indication of the blade/
drum interaction as is the static
value reported by R0.
Reports the magnitude of the
reaction of the drum to the
contact of the blade. (See R2)