Technical data
Leuze electronic GmbH + Co. KG
CML 730i
205
Limits for detecting objects
The detection of objects and the evaluation of the data depend on the following factors:
• Beam resolution and cycle time of the light curtain
• Movement speed of the objects
• Transmission rate of the data bytes
• Cycle time of the control
Minimum object diameter for detection perpendicular to beam plane
For a moving object, the cycle time of the light curtain must be shorter than the period of time that the object
to be detected is located in the beam plane.
For an object that moves vertically to the beam plane, the following apply:
v
max
[m/s]
= Maximum object speed
L
[m]
= Length of the object in the direction of movement
t
z
[s]
= Cycle time of the light curtain
or
L
min
[m]
= Length of the object in the direction of movement (minimum length)
v
[m/s]
= Object speed
t
z
[s]
= Cycle time of the light curtain
20.3 Minimum object diameter for stationary objects
The minimum object diameter of a stationary object is determined by the beam spacing and optic diameter.
Minimum object diameter for “parallel” beam mode:
2240
4.68
2240
2.44
2230
1.32
2210
1.00
2248
2320
4.84
-
-
-
-
-
-
2328
2400
5.00
2400
2.60
2390
1.40
-
-
2408
2480
5.16
-
-
-
-
-
-
2488
2560
5.32
2560
2.76
2550
1.48
2530
1.00
2568
2640
5.48
-
-
-
-
-
-
2648
2720
5.64
2720
2.92
2710
1.56
-
-
2728
2800
5.80
-
-
-
-
-
-
2808
2880
5.96
2880
3.18
2870
1.64
2850
1.00
2888
2960
6.12
-
-
-
-
-
-
2968
Measurement
field length B
[mm]
Measurement
field length B
[mm]
Measurement
field length B
[mm]
Measurement
field length B
[mm]
Profile length
L [mm]
with beam spac
-
ing A
5 [mm]
Cycle time
[ms]
with beam spac
-
ing A ]
10 [mm]
Cycle time
[ms]
with beam spac
-
ing A
20 [mm]
Cycle time
[ms]
with beam spac
-
ing A
40 [mm]
Cycle time
[ms]
NOTICE
Minimum length of the gap between two successive objects!
The gap between two successive objects must be greater than the minimum object diameter.
vmax
L 10mm
–
tz
=
Lmin v tz 10mm
+
=
