Focus Alignment - AGFA Avantra 36/44 Service Manual

5.5

Focus Alignment

Use the Focus Alignment Procedure to establish the correct position of the weak
lens (focus lens), which properly focuses the laser beam on the drum surfaces.
Position the weak lens by entering a focus home position value in the AVDIAG
program. This value is based on 4 mil thick media.
focus values derive from this base value automatically when selected from the
control panel. The focus home value is stored in EEPROM on the DEC.
Tools Required: Eye loupe
NOTE: The density must be correctly set before adjusting the
focus. The focus adjustment must be done in 3600 DPI.
Steps:
1. Connect the PC to the Avantra DEC board serial port. Connect the Avantra
APIS cable to the PC Imager board in your PC.
2. Launch the AVDIAG program from your PC.
3. Select Align and then DEC Machine Parameters.
The following dialog appears:
Loading Dec. EEPROM Machine Parameters.
4. Select Y in the dialog box.
The machine parameters now load up to the PC.
5. When the load process completes, select DEC (Image/Focus). Write down
the values for the focus position.
6. Press ESC.
7. Select Exit and then Soft Reset.
8. Launch the PC Imager program from your PC, and type in the system serial
number.
9. Select Image and Test Files.
10. Select FOCUS.FIL.
This file will now image on the Avantra.
11. When the file is finished, press ESC.
12. Select the Feed/Cut Icon on the Avantra control panel.
13. Remove the take-up cassette and develop.
14. Lay the output copy on a light table with the horizontal bars going left to
right.
Section I: Imagesetter
Other media thickness
Alignment 5-7