SICK MLG-2 ProNet - Minimum Detectable Object with Cross-Beam Function

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 15: 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.
Table 10: Minimum detectable object with cross-beam function on the MLG-2
Beam sepa‐
ration
Minimum distance Minimum detectable
object
(stationary object)
2m var‐
iant
3 m var‐
iant
5m var‐
iant
8.5m
variant
14.5 m
variant
In area B In area A
2.5mm 200mm 200mm – – – 2.5mm 4mm
5mm – – 110mm 120mm 120mm 6.5mm 9mm
10mm – – 220mm 240mm 240mm 9mm 14mm
20mm – – 440mm 480mm 480mm 14mm 24mm
25mm – – 550mm 600mm 600mm 16.5mm 29mm
30mm – – 660mm 720mm 720mm 19mm 34mm
50mm – – 1110mm 1200mm 1,200m
m
29mm 54mm
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 ProNet 8018748.1Q3I/2024-12-18 | SICK
Subject to change without notice