DAINIPPON SCREEN PLATE RITE 4300 User Manual page 99

10. Check the displayed information and then press [START].
The test exposure begins using the set information.
Test exposure for simultaneous adjustment exposes the patterns shown in the
following diagram incrementing the laser power (or focus value) in the
secondary scanning direction and the drum rpm (or zoom) in the primary
scanning direction.
Drum rpm (or zoom) is
incremented
30mm
95mm
5mm
5mm
Laser power
Drum rpm
Dot percentage = 97% Dot percentage = 100% Dot percentage = 0%
Dot percentage = 50% Dot percentage = 85% Dot percentage = 85%
Dot percentage = 3%
(Refer to Fig. 5-54 for the pattern images)
Fig. 5-51 Test exposure (simultaneous adjustment)
When the test exposure is completed, the test exposure selection screen
reappears.
For the test exposure, begin with a rough estimated initial value and large
NOTE
incremental value. Then examine the exposure conditions and make the minute
adjustments of the values.
Laser power
(or focus) is
incremented
Focus Zoom
Focus Zoom
(Negative plate)
(Positive plate)
C1 pattern
Chapter 5 User Menu
C1 pattern
5-39