OPD101
37
The profile images detected consist of 352 data points. Faulty data points are indicated as a
dashed line in the “Vision Assistant”. These data points are not used for determining the
matching value.
The data errors and the number of data points concerned for the currently measured height profile are
shown in the Vision Assistant.
Example:
Type of data error
Number of data points concerned
Low amplitude
5
12.3 Other types of incorrect behaviour
Situation
Possible cause
Solution
Object cannot be taught.
“Object out of range” is displayed
despite the object being in the operating
range of 150...300 mm.
Due to the sensor being inclined frontally
and the characteristics of the object /
background, some of the reflected laser
beams do not reach the receiver.
u
Slightly change the sensor position
(front inclination, reduce/enlarge the
distance to the object).
u
If possible, rotate the sensor or the
workpiece by 180°.
Sensor has been taught successfully.
However, the matching value is very low
(also for the taught object).
Sensor has been moved after teaching.
Info: After a successful “Guided Teach”,
the sensor should not be moved again.
Any change in position will lead to the
taught reference profile not being
recognised reliably.
u
Teach the sensor again.
Sensor has been taught successfully.
However, the matching value is
significantly lower than 90% for very
similar workpieces.
The new workpieces may have slightly
different surface characteristics, e.g.
reflective surfaces.
u
Incline the sensor slightly frontally or
laterally and teach it again.
u
Or: check whether the width of the
reference profile can be further
limited. Then teach the sensor again.
u
Or: manually adapt the [Integration
time].
u
Or: reduce the switching threshold.
Sensor has been used for a while.
Good parts are assessed to be bad
parts. The matching value is below the
set switching threshold.
Sensor has been moved unintentionally.
u
Teach the sensor again.
Front side of the sensor is soiled.
u
Clean the front side.
u
If necessary, change the sensor
position to avoid soiling and teach
the sensor again.
GB
