AGFA Avantra 36/44 Service Manual page 244

Avantra 36/44 Service Manual
4. Select Image and then Test Files.
NOTE: On new releases of the PC Imager software you can run all
four resolutions of PWM files at the same time by running
the PWM4UP30.FIL file.
5. Select PWM@12.FIL.
The system images the 1200 DPI PWM file.
6. When the above file finishes, run:
PWM@18.FIL
PWM@24.FIL
PWM@36.FIL.
7. When the above three files finish, press the Feed/Cut Icon on the Avantra
control panel.
8. Remove the take-up cassette and develop the film.
9. Place the output copy on a light table.
Each PWM file will have three separate exposure patterns. The reference
exposure pattern on the right was run using that resolutions density. The
resolution and the density value is in the header. The other two reference
exposure patterns were run using that resolutions density + or - the value
next to it. This number changes depending on the resolution. See Figure 5-
2.
The starting value (40) and the increment value (20) are the defaults and
can be found in the Header. These values can be changed in PC Imager
under Special Arrays. The starting value (40) is at the bottom row of the
pattern and increments by 20 until the top row reads 160.
10. Mark each row before proceeding.
Looking at the reference exposure pattern on the right under the Dot Bal-
ance column, you should see the square dot patterns equalize as you move
up the pattern. When they become equal this is the PWM value for that res-
olution. If they appear to become equal between steps, then use half the
increment between those two steps.
If the square dot patterns never become equal, this means that the density
is either to high or to low. Check the other two reference exposure (+/-)
patterns to see if there is a dot pattern that is equal. This tells you in what
direction (+/-) to move the density. Change the density and re-run that
PWM file. The value picked should come from the reference exposure pat-
tern and not the reference exposure +/- patterns.
5-12 Alignment