Pepperl+Fuchs FUQ-B8 Manual page 15

VB24
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 par. 7.4.
1. Power up the scanner
the Unlocked position. 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.
The value of the Focus Position must be stored in memory. If the mechanical position changes by
more than the allowed tolerance of the value in memory, an alarm will be sent. See the Focus
Lock function in step 4, Mode Configuration.
NOTE
As an additional visual aid during focusing, the indicator LEDs show the relative focus position
as follows:
READY
GOOD
SETUP
TRIGGER
LEARN
COM
TEST
STATUS

less than 30 cm
READY
GOOD
SETUP
TRIGGER
LEARN
COM
TEST
STATUS
 
40 cm MEDIUM
Wait for the power up sequence to finish. By default the scanner focus is in
.
READY
FOCUS
GOOD
TRIGGER
COM
TEST
STATUS

30 cm NEAR
READY
FOCUS
GOOD
TRIGGER
COM
TEST
STATUS

42-58 cm
READY
GOOD
TRIGGER
COM
TEST
STATUS

more than 60 cm
READY
FOCUS
GOOD
SETUP
TRIGGER
LEARN
COM
STATUS

READY
FOCUS
GOOD
SETUP
TRIGGER
LEARN
COM
STATUS

FOCUS
SETUP
LEARN
FOCUS
SETUP
LEARN
TEST
 
32-38 cm
FOCUS
SETUP
LEARN
TEST
 
60 cm FAR
5