Operating Instructions
Chapter
6
CLV 490 Bar Code Scanner
8 008 796/0000/25-06-2002
©
SICK AG · Division Auto Ident · Germany · All rights reserved
6-9
Operation
When the CLV is switched on for the first time, it is started with
the factory default
settings.
The following parameters must then be set:
a) Adjusting the optical reading properties
•
Scanning frequency
Ö
R
EADING
CONFIGURATION
tab
Ö
Reading Parameters
•
Blank zone
Ö
R
EADING
CONFIGURATION
tab
Ö
Start/stop ratio
•
Poor quality bar code print
Ö
R
EADING
CONFIGURATION
tab
Ö
Code label characteristics
•
Relative modul width
Ö
R
EADING
CONFIGURATION
tab
Ö
Code label characteristics
Parameterizing the autofocus mode (Part 1):
Note
The minimum and maximum values for the active evaluation range of the scan line (M
IN
.
AND
M
AX
. C
ODE
P
OSITION
) can be checked in the S
HOW
CP-
LIMITS
mode.
See
Chapter 6.5.5 Show CP-limits, Page 6-26
.
Action
Line scanner
Line scanner with oscillating mirror
1. Activate autofocus mode
Ö
R
EADING
C
ONFIGURATION
tab
F
OCUS
TRIGGER
SOURCE
Ö
Autofocus
Ö
R
EADING
C
ONFIGURATION
tab
F
OCUS
TRIGGER
SOURCE
Ö
•Autofocus
2. Choose autofocus mode
A
UTOFOCUS
Ö
M
ODE
– Minimum distance or
– Differential background or
– Differential background and tracking
see
A
UTOFOCUS
Ö
M
ODE
– Minimum distance or
– Differential background or
– Differential background and tracking
see
3. Configure CLV for distance
measurement
(define visible range)
A
UTOFOCUS
Ö
E
DIT
R
EADING
F
IELD
– Minimum Code Position CP
– Maximum Code Position CP
A
UTOFOCUS
Ö
E
DIT
R
EADING
F
IELD
– Minimum Code Position CP
– Maximum Code Position CP
–
Oscillating mirror amplitude CW
4. Set up autofocus mode
A
UTOFOCUS
Ö
E
DIT
A
UTO
FOCUS
Ö
A
DJUSTMENTS
– Preference focus distance
– Focus relase
Ö
L
IMITS
– Auto focus limitation
– Scan angle limitation
– Auto focus space,
see
Ö
O
PTIMIZATIONS
– Delay of focus change
– Depth of field optimization
– Object height passing in OTS mode
– Distance measurement
Ö
A
CTIVE
– Source of distance information
A
UTOFOCUS
Ö
E
DIT
A
UTO
FOCUS
Ö
A
DJUSTMENTS
– Prefereence focus distance
– Focus relase
Ö
L
IMITS
– Auto focus limitation
– Scan angle limitation
– Oscillating angle limitation
– Auto focus space,
see
Ö
O
PTIMIZATIONS
– Delay of focus change
– Depth of field optimization
– Object height passing in OTS mode
– Distance measurement
Ö
A
CTIVE
– Source of distance information
5. Choose time of focusing
(based on reading pulse)
F
OCUS
T
RIGGER
S
OURCE
Ö
Inputs/Serial/Autofocus
– Immediate or Synchronous
– Latched
F
OCUS
T
RIGGER
S
OURCE
Ö
Inputs/Serial/Autofocus
– Immediate or Synchronous
– Latched
Table 6-4: Guide: Parameterizing autofocus mode (Part 1)