Xerox Phaser 8400 Service Manual page 153

Paper Path Drive
This test moves the gear train in one direction while capturing data, does a reversal to capture
reversal transient data, then operates in the other direction.
R# Definition
0 Forward Drive Power
Level (watts)
1 Up Motion Drive
Error Ripple (watts)
2 Swing Arm
Transition Time (sec)
X-Axis Drive
This test drives the X-Axis motor in each directions until the printhead stalls into the stops and
then moves the printhead into the clear and performs an on the fly reversal. The power profile is
used to confirm operational goals.
R# Definition
0 Right Stall Power
Level (watts)
1 Left Right Distance
(in)
2 Right Left Traverse
Average Power
Level (watts)
3 Right Left Traverse
Power Ripple (watts)
4 Left Right Traverse
Power Average
Level (watts)
Service Manual
Typical
Value Actions
Reports the average drive power level in the
foreword direction.
Reports the average drive power level in the
backward direction.
Reports the time that the lower portion of the
paper path drive is disconnected while the
swing arm transitions to the other drive
position.
Typical
Value Actions
5 to 10 Reports the motor/drive electronics stall power.
An abnormal level may indicate a motor/motor
drive problem.
0.32 to Reports the distance between the left and right
0.48 stall points. An abnormal value may indicate an
problem that restricts the range of motion
(pinched cable, etc.).
3.5 to 8.5 Reports the average power required to move
the printhead from the right hard stop to the left
hard stop. An abnormal value may indicate a
problem with the lead screw or printhead
bearings (lubrication, etc.).
.20 to 1.8 Reports ripple in the power level needed to
move the printhead from the right hard stop to
the left hard stop. An abnormal value may
indicate a problem with roughness in the drive
mechanism or an interference with the
printhead motion.
4.0 to 8.5 Same as R2 except for the other direction of
motion.
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