Table of Contents
Advertisement
ObjectC 100
Object100 with pitch = 10 mm (Reverse beam counting direction)
h
= 5 mm
off
p
= 10 mm
Object100 with pitch = 25 mm (Standard beam counting direction)
h
= 6 mm
off
p
= 25 mm
Object100 with pitch = 25 mm (Reverse beam counting direction)
h
= 19 mm
off
p
= 25 mm
4.5.
Measurement accuracy
An object can be detected in a light beam even if only a small part of the aperture area is covered. However, for
the object to be definitely detected, the aperture area should be completely covered. The aperture measures 8
mm in the longitudinal axis and 3 mm in the diagonal axis of the light curtain. If the light beam state signals that it
is interrupted, the following tolerance for a measurement is considered:
h
= h – b/2
min
h
= h + p + b/2
max
4.6.
Measurement velocity
The allowed maximum speed an object can pass through the monitoring field of the light curtain depends on the
size of the object, the optical aperture geometry and the light curtain length. An aperture of an Object100 light
curtain is rectangular measuring 8 by 3 mm.
So that an object is detected definitely, the aperture has to be covered fully for the minimum measurement time
t
. The minimum measurement time depends on the light curtain length, i.e. the number of optical elements.
m
26
n
1
2
h
5
15
n
1
2
h
6
31
n
1
2
h
19
44
h
Position of the actual beam in mm to the reference point.
(see chapter 4.4)
h
Minimal position of the object
min
h
Max. position of the object (before the next beam state is
max
active)
b
Height of the aperture = 8 mm
p
Pitch (10 or 25 mm)
Figure 12: a) Object is not recognized from element at position h
b) Object is recognized definitely at position h
c) Object is recognized definitely at position h+1
http://csa.cedes.com/
3
4
5
25
35
45
3
4
5
56
81
106
3
4
5
69
94
119
Programmer's Guide
6
7
...
55
65
...
6
7
...
131
156
...
6
7
...
144
169
...
© CEDES Safety & Automation AG
[mm]
[mm]
[mm]
Advertisement
Table of Contents
