SICK MLG-2 Pro

3.6.3 Minimum detectable object with cross-beam function
The parallel-beam function is used for measuring by default. With the parallel-beam
function, each light beam is received only by the receiver element situated directly
opposite.
With the cross-beam function, a sender LED projects beams to several receiver diodes.
The cross-beam function increases the measurement accuracy and enables the detec‐
tion of smaller objects.
Figure 14: Cross-beam function
A minimum distance between the sender and the receiver is required for the cross-
beam function. The minimum detectable object size depends on the position of the
object within the detection area. Detection of the smaller minimum detectable object
size is therefore only possible in the central area (b) of the detection area.
•
The cross-beam function is only useful for object detection (NBB ≤ 1). For other
applications (height classification, object recognition, etc.), the results of the paral‐
lel-beam function are used.
•
Use of the cross-beam function increases the response time.
•
With the cross-beam function, a minimum distance needs to be maintained
between sender and receiver. The minimum distance depends on the aperture
angle of the light grid.
•
For moving objects for the cross-beam function, the minimum detectable object
depends on the speed of the object.
Beam sepa‐
ration
Minimum dis‐
tance
2 m variant
Minimum dis‐
tance
5 m variant
Minimum dis‐
tance
8.5 m variant
Minimum detectable object
(stationary object)
In area B In area A
2.5 mm 200 mm – – 2.5 mm 4 mm
5 mm – 110 mm 120 mm 6.5 mm 9 mm
10 mm – 220 mm 240 mm 9 mm 14 mm
20 mm – 440 mm 480 mm 14 mm 24 mm
25 mm – 550 mm 600 mm 16.5 mm 29 mm
30 mm – 660 mm 720 mm 19 mm 34 mm
50 mm – 1110 mm 1200 mm 29 mm 54 mm
Table 14: Minimum detectable object with cross-beam function on the MLG-2
3 PRODUCT DESCRIPTION
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O P E R A T I N G I N S T R U C T I O N S | MLG-2 Pro 8017460.ZIK1/2017-02-13 | SICK
Subject to change without notice