OPD101
9
3.3 Profile properties
The status parameter [Profile properties] specifies the relative proportion of valid measured values in
the height profile. Only the profile range selected by the user will be taken into account. The parameter
can be used as an indicator for the profile quality during operation. Parameter level basic functions
(
29).
Parameter value [%]
Description
50
50 % of the data points in the measured height profile are
valid and used to determine the matching value. The invalid
values will not be considered.
Ideally, the status parameter [Profile properties] should be recorded and saved directly after
teaching with the taught object (reference object). The profile quality can be checked at any
time during operation using this reference object.
If the value has decreased significantly, e.g. due to changes in the sensor position, it is
advisable to teach the object again.
The status parameter can be continuously monitored via the ifm parameter setting software
“Vision Assistant”. The status parameter can therefore also be used to optimise the sensor
position during teaching.
3.4 Applications
The photoelectric sensor is particularly suitable for process quality assurance, more precisely
monitoring of workpiece shapes and fault detection.
Examples:
•
Monitoring of the processing quality, e.g. diameters of drill holes.
•
Check of workpieces for faulty processing, e.g. missing drill holes.
During the measurement, the workpiece has to be still.
For static situations, the continuous measurement mode has to be set. The sensor permanently
monitors the workpiece and signals deviations from the activated reference profile. Continuous
mode (
27).
For dynamic situations, the triggered measurement mode has to be set. A higher-level process
control unit decides when the detection takes place and ensures that the workpiece is in the
detection zone and that it does not move. Triggered mode (
27).
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