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Avantra 36/44 Service Manual
5.9
Carriage Encoder Alignment Procedure
Use the Carriage Encoder Alignment Procedure to normalize the A and B
encoder signals from the analog (velocity) encoder. Normalizing the A and B
encoder signals reduces the velocity error signal injected into the carriage from
the encoder, improving imaging performance.
Perform the alignment by executing the Carriage Align Test contained in the
AVDIAG Program.
carriage moves at several different speeds.
maximum gain and offset values for each signal and averages them together.
The resulting numbers can then be loaded into the DSP parameter list in
EEPROM.
The system reads these values at boot-up and uses them while
imaging.
Tools Required: None
Steps:
1. Connect the PC to the diagnostic serial port of the system.
2. Turn the system on and allow the boot cycle to complete.
3. Launch the AVDIAG Program from your PC.
4. Select ALIGN and then Carriage Align and press ENTER.
A message appears warning that the test modifies the DSP machine param-
eters and queries about continuing.
5. Press Y.
The test starts running and takes approximately 80 seconds to complete.
When the test completes, the results are displayed. A prompt asks if you
wish the previous values to be overwritten.
6. Press Y to load the values or press N to exit the test without saving the
new values into EEPROM.
5.10 Supply Motor Offset Alignment
Procedure
Use this procedure to set the supply motor current offset. The electronic driver
for the supply feed motor acts differently when driving in either of the two
directions (spindle A versus spindle B). By performing the following alignment
procedure and entering the calculated offset, the software minimizes the
differences and makes the feeds from either spindle the same.
Steps:
1. Turn the system on and unload any media from the system.
5-14 Alignment
This test samples the A and B encoder signals while the
The test takes the minimum and
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