Defect Detection Measurement; Handling Coordinates - Omron SYSMAC FH Series User Manual

Defect Detection Measurement

Color changes within the measurement region are used to find defects such as
scratches,contamination, and chipping.
After measurement region is drawn, a rectangle (defect detection region) is
automatically formed in this region. While moving the defect detection region
around, calculate average density for each area to determine the difference
between the original area and the surrounding area. This difference is called
the defect level. Calculate the defect level for all defect detection areas. If the maximum value exceeds the
judgement value, it is judged that there are defects in the measurement region.
Increasing "Defect size" allows for shortening of processing time, but this will reduce measurement accuracy.
Setting item
Upper
Lower

Handling Coordinates

The processing items for measuring positions have a setting item called "Output parameter" with which you can
select how to handle coordinates.
In "Output parameter", you can set "Output coordinates" and "Calibration".
Output Coordinates
Selects coordinate types to be output to external devices.
Example)
Image when setting
+ +
Reference position
This angle is used as
model for position
compensation
Before position compensation
Coordinate values before position compensation are output.
X
0
Y
842
Measurement Mechanism
Specify the upper and lower limits of defect detection size based on the size of scratch or
contamination to be detected.
The larger the difference between upper and lower limits, the easier it is to detect the scratches
or contamination of various sizes.
For both upper and lower limits, higher values for defect detection size limits leads to weaker
detection sensitivity and shorter processing time.
Defect detection size
Defects
Sensitivity high
Processing time long
Measurement image
Image with position
(image without position
compensation) compensation
(for left upper deflection)
Description
low
short
The area outside of
imaging range is turned
into black
WWW.NNC.IR
Defect
Defect detection size
Vision System FH/FZ5 Series
User's Manual (Z340)