Datasheet

Photomicrosensors
25
Interpreting Engineering Data
Sensing Position Characteristics Repeated Sensing Position Characteristics
Example for the EE-SX770 Example for the EE-SX770
The graph shows the position of the edge of the sensing object
where the Sensor will respond.
The graph shows the fluctuation in the position of the edge of the
sensing object where the Sensor operates. Use this as a rough
guide for the positioning accuracy of the sensing object.
Tr ON
Tr OFF
0 1.0 2.0 3.0 4.0 5.0 6.0
Distance d
(
mm
)
d
Tr OFF
Tr 0/V
2.16 2.18 2.20 2.22
Distance d (mm)
Vcc = 24 V, No. of re
p
etitions: 20, Ta = 25˚C
d
Δd = ±0.002 mm
Receiver Output Excess Gain vs.
Sensing Distance Characteristics
Parallel Movement Characteristics
Example for the EE-SPW311/411 Example for the EE-SPW311/411
• The receiver output excess gain shows values when setting the
maximum sensitivity.
• The values above are typical for models with a rated sensing dis-
tance of 1 m. It can be seen that the receiver output excess gain
is increased by a factor of approximately ten at the rated sensing
distance.
• Through-beam Sensor: The graph shows the position of the
sensing limit of the receiver when the position of the emitter is
constant.
• Retroreflective Sensor: The graph shows the position of the
sensing limit of the Reflector when the position of the Sensor is
constant.
• Multiple Through-beam Sensors: A range of 1.5 times the
amount shown in the graph is required to prevent mutual interfer-
ence.
1,000
500
300
100
50
30
10
5
3
1
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8
Distance between sensors
(
m
)
Receiver output excess gain (multiple)
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8
Distance X
Distance X (m)
Distance Y
140
120
100
80
60
40
20
0
Distance Y (mm)