SICK GTB20 Betriebsanleitung Seite 32

OPERATING INSTRUCTIONS
en
6.3 Setting
32 O P E R A T I N G I N S T R U C T I O N S | GTB20
Minimum distance in mm (y) between the set sensing
range (x) and white background (90 % remission)
1,000
(39.37)
1
800
6%/90%
(31.50)
600
(23.62)
18%/90%
400
(15.75)
200
(7.87)
0
0 0.5 1 1.5
(1.64) (3.28) (4.92)
Figure 5: Characteristic line, GTB20
1
0.06 /
1.5
0.1
2
0.02 /
1.8
0.1
3
0.005 /
0.1
0 0.5 1 1.5 2 2.5
(1.64) (3.28) (4.92) (6.56) (8.20)
Distance in m (feet)
D
C
A
Figure 6: Bar diagraph
A Sensing range min. in m
B Sensing range max. in m
C Visibility range
D Setting range switching threshold for background suppression
Check the function as described in
behave as described in see table 7, page
Sensing range setting
The sensing range is adjusted with the potentiometer (type: Multiturn, 7 rotations).
Clockwise rotation: sensing range increased; counterclockwise rotation: sensing range
reduced. It is recommended to place the object within the sensing range, e.g. see
table 11. Once the sensing range has been adjusted, the object is removed from the
path of the beam, which causes the background to be suppressed. The digital output
changes [see table 7 and table
Adjustable sensing range: 100 mm ... 3000 mm.
Example:
Safe suppression of the background
2
3
90%/90%
Black object (6 % remission)
Set sensing range x = 1.0 m
Needed minimum distance to white
background y = 200 mm
2 2.5 3 3.5
(6.56) (8.20) (9.84) (11.48)
Distance in m (feet)
3.0
3 3.5
(9.84) (11.48)
B
see table 7, page 29. If the digital output fails to
29, check the application conditions.
10].
White
background (90 %)
x y
8026846.1GXN/2022-11-05 | SICK
Subject to change without notice