Datalogic Scanning DS4800 - Manuale (Pagina 6)

DS4800 QUICK GUIDE
6
STEP 3 – FOCUS THE SCANNER
The reading distance depends on the focus distance of the scanner and should be set according to the
application requirements. The Focus Position is set directly through the focus adjustment screw on the front panel
of the scanner. This screw moves the internal lens of the scanner to change the focal length of the scanner. The
setting is continuous but should not be set beyond the limits "Too Far" or "Too Near" which appear on the display
at the extremes of the focus range. Although the scanner reads across the entire focus range, there are three
guaranteed positions which correspond to the reading diagrams in the Appendix of this Quick Reference Guide.
1. Power up the scanner and wait for the power up sequence to finish.
The alternating message on the display shows the mechanical
Focus Position.
2. Using a screwdriver turn the focus adjustment screw in the desired
direction clockwise (focus nearer to the scanner) or
counterclockwise (focus farther from the scanner). The focus
position in centimeters and inches is shown on the scanner display.
NOTE
The value of the Focus Position can be stored in memory.
If the mechanical position changes with respect to the
value in memory, an alarm will be sent. See the Focus
Lock function in step 4, X-PRESS™ Configuration.
As an additional visual aid during focusing, the indicator LEDs show the relative focus position as follows:
READY
GOOD
TRIGGER
COM
STATUS
SETUP
LEARN
TEST
READY
GOOD
TRIGGER
COM
STATUS
SETUP
LEARN
TEST
READY
GOOD
TRIGGER
COM
STATUS
SETUP
LEARN
TEST
Î
less than 30 cm
Н О
30 cm
Н О
32-38 cm
READY
GOOD
TRIGGER
COM
STATUS
SETUP
LEARN
TEST
READY
GOOD
TRIGGER
COM
STATUS
SETUP
LEARN
TEST
READY
GOOD
TRIGGER
COM
STATUS
SETUP
LEARN
TEST
Н О
40 cm
Н О
42-58 cm
Н О
60 cm
READY
GOOD
TRIGGER
COM
STATUS
SETUP
LEARN
TEST
Í
more than 60 cm