Adjusting The Object Position - Omron Z302-E1-03 User Manual

3-3 Adjusting the Object Position

If objects are moving, the position in the image of the characteristic that is to be measured will vary according
to the timing of the trigger signal. The FQ Vision Sensor offers two different ways to adjust this position
variation.
Function
Position compensation
Trigger delay
Position Compensation
The FQ Vision Sensor performs measurements in measurement regions that are set to a fixed shape and
position by the operator. A measurement is not performed properly if the object is not positioned inside this
measurement region (e.g., the result will be NG even if the object is OK). In machines in which the position of
the object varies for each image, stable measurements would be impossible. To cope this problem, the Position
Compensation function aligns the whole image so that the object to be measured is moved exactly to the
measurement region.
Reference position (as set by the operator)
The measurement object is properly within the measurement region.
Object is out of place:
The measurement object is
outside the measurement
region.
[Image] – [Position compensation] – [Mode on/off]
1
Press [ON] for [Mode on/off]
2
Press [Settings].
42

Adjusting the Object Position

If the timing of the trigger is accurate, the FQ Vision Sensor can correct variations in the
position of the object for each measurement with the Position Compensation function.
A delay can be applied from when the trigger (the TRIG signal) is input until when the
image is input, to synchronize the timing of image input with the speed of the moving
objects.
Measurement region
Object
The image is aligned so that the object
is returned to the reference position
before performing measurements.
Position compen-
sation applied...
Description
The object is measured
properly within the
measurement region.
Reference
p. 42
p. 44
FQ User's Manual