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Operating Instructions
Chapter
6
CLV490 Bar Code Scanner
8009993/RA61/2007-07-20
©
SICK AG · Division Auto Ident · Germany · All rights reserved
6-11
Operation
Note
The minimum and maximum values for the active evaluation range of the scan line (reading
angle limits) can be checked in the S
HOW
RA-L
IMITS
mode.
See also
Chapter 6.5.5 Show RA-limits, Page 6-46
Recommendation
Don’t configure the reading space if you use the free running mode in combination with a
fixed focus position (fix focus mode). Restrict the reading space using the reading angle
limits.
•
Autofocus:
Using the periodic object distance measurement function, the CLV490 creates an up-
to-date distance profile in its area of view with every 10th scan. From this profile, the
CLV490 uses the selected autofocus mode, the parameterized limits of the autofocus
area, and the taught-in background (optional) to automatically determine the required
focus position for a detected object. The defined autofocus area should be within the
limits of the parameterized reading area.
•
Event-controlled focus control:
The CLV490 controls its focus position by means of object distance information, which
it receives either externally via the switching inputs (reading from above: object height
detection by means of photoelectric switches) and their assignment to parameterized
distance configurations, or by means of command strings via the serial data interface
(also with reference to distance configurations). In timer mode (search), the CLV490
changes its focus position step by step according to the parameterized number and
sequence of distance configurations. The line scanner with oscillating mirror also uses
– similar to the timer mode – its oscillating mirror reversal points at the maximum
deflection points to trigger the switchover.
Action
Settings in CLV-Setup
Define reading angle limitations
–
and/or
–
Ö
R
EADING
C
ONFIGURATION
tab
Ö
R
EADING
AREA
section
Ö
R
EADING
A
NGLE
L
IMITS
Ö
D
ISTANCE
CONFIGURATION
button
Ö
D
ISTANCE
CONFIGURATION
tab
– configuration 1: Minimum RA and Maximum RA
Oscillating mirror:
– additionally: Oscillating mirror amplitude CW
Define reading space
Ö
R
EADING
AREA
section
Ö
R
EADING
AREA
Ö
R
EADING
S
PACE
P
ARAMETERS
button
– Right edge of conveyor (Y 1)
– Left edge of conveyor (Y 2)
– Level of conveyor (Z 1)
– Maximum scanning height (Z 2)
Define the CLV490 position referred to the reading space
(point of origin):
Ö
D
EVICE
C
ONFIGURATION
tab
Ö
S
CANNER
P
OSITION
P
ARAMETERS
button
Ö
A
NGLES
– alpha, beta and gamma
Ö
C
OORDINATES
– x-, y- and z-coordinates
Table 6-4: Guide: Configuring the reading area
b) Selecting focus control mode
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