SENSOPART FA 45 Montage- Und Bedienungsanleitung Seite 88

Using the mouse, move the field of view to the
desired position and set the size so that the
colour object is covered.
Optimise the selection criteria by using the
criteria Saturation and Brightness
Note: If possible, use one attribute only (pre-
ferably hue), if this is suitable for the task in
question. For this application, only the colour
(hue) was used for detection. Important: when
only one attribute is being used, the limit
values of the other attributes must be set to
the maximum and minimum settings.
Check and set by switching to the false colour.
The colour selection in fig. A with small field
of view produces a result (C) of approx. 80%,
i.e. 80% of the area of the field of view are
filled with the colour selected under „hue" in
the histogram.
In Fig. B, the field of view was enlarged to
cover possible changes in position of the
object during operation. The result (D) of ap-
prox. 35% with the threshold value set at 16%
means that a „good" part would have to fill at
least 30% of the field of view with the desired
colour in order to produce a positive result at
the output of the FA45 Colour Sensor.
In the example, no continuous colour surface
is required (object size = 0%), i.e. the colour
pixels can occur in isolation in the field of
view and are still counted. Setting the object
size at 10% (still with reference to the field of
view) would mean that 2/3 of the minimum
number of pixels must be in a continuous area
of colour.
When all the necessary settings are complete, set Trigger mode back to „Triggered" (if necessary) and change to
Run mode by clicking on „Start". In stand-alone operation of the sensor it starts immediately in Run mode.
88
Fig. A: Small field
of view
Fig. B: Large field
of view
C
FA 45 Vision Sensor - Colour Sensor GB - 068-13760 - 05.06.2008-01
Mounting and
operating instructions
D