Xerox Phaser 8400 Service Manual page 161

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 Release
Displacement (mpts)
5 Release Time (sec)
6 Releasing Period
(sec)
Service Manual
Typical
Value Actions
-10 to 2 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).
.0030 to Reports time between engagement of the
.0035 stripper solenoid and initial contact between
the blade and the drum.
May indicate the geometry of the mechanism
(i.e. parts out of tolerance, mis-assembled,
bent, etc.), causing an incorrect blade to drum
gap.
0 to 0.11 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.
3 to 18 Reports the magnitude of the reaction of the
drum to the contact of the blade. (See R2)
-0.75 to Reports the static difference between the
2.2 average ya_fe before and after the blade
disengages from the drum, indicating the
strength of the blade/drum interaction while
pulling off the drum. (See R0).
0 to 0.09 Reports the time between the disengagement
of the stripper sol and the point when the blade
begins to withdraw from the drum (see R2).
0 to .001 Reports the time between the disengagement
of the stripper sol and the point when the
reaction of the drum to the withdrawal of the
blade fades back into the ripple (see R2).
4-41