KEYENCE LS-3100/3100W Series - Manual (Page 36)

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CHAPTER 4 Functions and Controls
A A A A A SEG (Segment)
Key
Targets placed within the measurement area interrupt the passage of the
laser beam, thus creating a light-dark pattern. The border between the light
and dark regions is referred to an "edge". Also, each dark or light region
separated by the edge is called a "segment". Definition of Segment
Transmitter Receiver
Targets
Edge1
Edge2
Edge3
Edge4
Edge5 (X-1)
Edge6 (X)
Direction of scanning
by laser
The desired pair of edges is to be selected from those shown above, and the
distance between these two edges measured.
• The edges are numbered in the order that they are scanned by the laser
(from top to bottom).
• The desired pair from among up to 126 edges can be selected.
Description 4 types of segment pairs, DIA, EDGE1, EDGE2, (m,n), can be measured.
The description of measurement for each pair is given below.
DIA: This mode is applicable to measurement of targets’ outer diameters. In
the above figure, the distance between edge 2 and edge (X-1) is measured.
When there is only one target, its outer diameter is measured. When there
are two or more targets, the distance between the upper edge of the upper
most target to the lower edge of the lower most target is measured.
EDGE1: The width of the uppermost region where the laser is not inter-
rupted by the target is measured. This mode is applicable to measurement of
changes in targets’ diameters. In the above figure, the distance between
edge 1 and edge 2 is measured.
EDGE2: The width of the lowermost region where the laser is not interrupted
by the target is measured. In the above figure, the distance between edge
(X-1) and edge X is measured.
(m,n): The distance between two desired edges is measured. When meas-
uring two or more targets, this mode is applicable to measurement of the
outer diameter of each target or to measurement of the gap between two
targets.
In (m,n) mode, both "m" and "n" represent the edge numbers ranging from 1
to 126. Make sure that the number specified for "n" is greater than that for
"m".
Note
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