Check The Application Conditions - SICK WTB26 Manual Del Usuario

7.2

Check the application conditions

8020354.19RH / 15.01.2021 | SICK
Subject to change without notice
Table: Alignment
Figure 2: Alignment 1
WTB26 are photoelectric proximity sensors with background suppression. Depending
on the remission of the object to be detected, and perhaps the background behind it,
a minimum distance (y) between the set sensing range (x) and the background is to be
maintained.
Check the application conditions: Adjust the sensing range and distance to the object
or background as well as the remission capability of the object according to the corre‐
sponding diagram [see figures 5 and 7] (x = sensing range, y = minimum distance
between set sensing range and background (white, 90%)) Remission: 6% = black 1,
18% = gray 2, 90% = white 3 (referring to standard white as per DIN 5033). We
recommend that the adjustment be performed with an object of low remission.
The minimum distance (= y) for the background suppression can be determined from
the diagram [figure 4 1] as follows:
Example: x = 600 mm, y = 40 mm. That is, the background (white, 90%) is suppressed
at a distance of > 40 mm of the configured sensing range.
Table 6: Application conditions
Minimum distance in mm (y) between the set sensing
range and background (white, 90%)
y
200
WTB26P-xxxxx1xx
180
2
1
160 18%/90%
3
6%/90%
140
90%/90%
120
100
80
60
40
20
0
0
400 800 1,200 1,600 2,000
(15.75) (31.5) (47.24) (62.99) (78.74)
Distance in mm (inch)
Figure 4: Characteristic line 1, WTB26P-xxxxx1xx, red light
Sensing range on black, 6% remission
1
Sensing range on gray, 18% remission
2
Sensing range on white, 90% remission
3
Figure 3: Alignment 2
white background (90%)
x y
Example:
Sensing range on black, 6%,
x = 600 mm, y = 40 mm
x
COMMISSIONING
1
100 /
800
180
2
75 /
1,000
180
3
30 180 1,600
0 180 400 800 1,200 1,600
(7.09) (15.75) (31.5) (47.24) (62.99)
Distance in mm (inch)
A Adjustment range
A = Detection distance (depending on object remission)
7
BluePilot:
Sensing range
indicator (blue LED)
Teach-Turn
adjustment
9