Diagnostics and Adjustments
4 - 133
Y-Axis Encoder (Test ID# 10)
- This test finds the encoder home positon at faster rates with
each cycle to find the maximum rate at which the home location can be seen.
Test ID#
R#
Definition
Results
Interpretation/Actions
Y Axis Encoder
ID# 10
0
Max Home flag
sense velocity
< 106000
Encoder gap alignment may be
off, the encoder disk may be
scratched or the encoder sensor
may be defective.
1
Plus postion loss
during positioning
> 2
Encoder gap alignment may be
off or the encoder disk may be
scratched.
2
Minus postion
loss during
positioning
> 2
Y-axis Geometry (Test ID# 11)
-This test measures the amplitude and frequency of vibration
peaks in the y-axis system. The test will identify up to 15 of these peaks and display the results
as AMPLITUDE @ FREQUENCY. The frequencies will vary slightly. The table below identifies
the amplitudues at which key frequencies are exceeding their normal range.
Results
Interpretation/Actions
> 2500 @ 4.9 + 0.5
Retension Y-axis belts then
replace the y-axis pulley
assembly.
> 2300 @ 6.2 + 0.6
Check the drum for binding when
rotated. Replace the drum
transfix assembly if it is binding.
> 3700 @ 25.4 + 2.5
Retension y-axis belts then
replace y-axis pulley assembly.
> 500 @ 33.3 + 3.3
> 550 @ 66.6 + 6.7
> 800 @ 87.6 + 8.8
Replace y-axis motor.
> 1000 @ any frequency > 15.0
Retension y-axis belts and
inspect all components of the
y-axis for damage or binding.
Y-axis Belt Slip (Test ID# 12)
- This test prints a special banded image and measures the
effect on y-axis motion as the print is transfixed.
Test ID#
R#
Definition
Results
Interpretation/Actions
Y Axis Belt Slip
ID# 12
0
Slip index
> 4.0
Ensure that the media is not
heavier than 24 lb. Retension
y-axis belt then replace y-axis
pulley assembly.
< 1.8
Media may be too light (16 lb) or
the test image may not be a good
solid fill. The front to back
alignment of the test image may
also be off. Re-run the test.
1
Peak Y-axis
following error
> 72
Re-run the test. Verify that
normal weight media is being
used.
< 40
2
Average Y-axis
following error
> 25
< 17
Table 4-4 Check Menu Value Key
Summary of Contents for Phaser 840
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