Check The Application Conditions - SICK WTF16 Instrucciones De Operación

7
COMMISSIONING
7.2

Check the application conditions

8
Figure 1: Alignment
WTF16 are photoelectric proximity sensors with foreground suppression. The photoelec‐
tric proximity sensor requires a background as a reference. The remission and position
of the background should remain as uniform as possible. The maximum distance (x)
between the photoelectric proximity sensor and background as well as the minimum
object height (y) must be upheld.
As a rule, a WTF16 is used to detect very flat objects on a conveyor belt.
Check the application conditions: Compare distance between sensor and background,
minimal object height as well as remission capability of background and object with the
associated diagram (see figure 2, page
page 9) (x = sensing range, y = minimum object height. Remission: 6% = black 1,
90% = white 2 (referring to standard white as per DIN 5033).
Example: x = 300 mm, y = 7 mm, i.e. a white object is detected from a height of at least
7 mm on a black background. The distance between photoelectric proximity sensor and
background is 300 mm.
Table 6: Application conditions
Minimum object height in mm (y)
y
26
WTF16P-xxxxx2xx
24
90%/6%
20
16
12 6%/6%
8
6%/90%
4
90%/90%
0
0 50 100 150 200 250 300 350
(1.97) (3.94) (5.91) (7.87) (9.84) (9.84) (13.78)
Distance in mm (inch)
Figure 2: Characteristic line 1, WTF16P-xxxxx2xx, red
light
Black object, 6% radiance factor, in front of
1
black background, 6% radiance factor
Black object, 6% radiance factor, in front of white
2
background, 90% radiance factor
White object, 90% radiance factor, in front of
3
black background, 6% radiance factor
White object, 90% radiance factor, in front of
4
white background, 90% radiance factor
8, see figure 3, page 9
3
1
2
x
4
y
Background
x
Example:
400
Sensing range on black background, 6%,
(15.75)
x = 300 mm, y = 7 mm for white object
or see figure 4,
1
2
100 400
(3.94) (15.75)
Distance in mm (inch)
D
C
A B
A Sensing range min. in mm
B Sensing range max. in mm
C Viewing range
D Adjustable switching thresh‐
old for foreground suppres‐
sion
E Sensing range indicator
F Teach-Turn adjustment
Sensing range on black, 6%
1
radiance factor
Sensing range on white, 90%
2
radiance factor
8024126.19RH / 22.12.2020 | SICK
Subject to change without notice
BluePilot:
E
F