Omron Z302-E1-03 User Manual page 62

Unstable Edge Position Results
There Is an Edge But It Cannot Be Detected
− [Inspection]
[Inspect]
Parameter Setting
Edge level Range: 0 to 100
Default: 50
Note
Edge Level
An edge is detected in the following way.
1. The color change distribution of the entire measurement region is determined.
2. The minimum color change is 0%. The maximum color change is 100%.
3. The location where the color change intersects with the edge level is detected as the edge.
Measurement
region
Noise Is Mistaken as an Edge
− [Inspection]
[Inspect]
Parameter Setting
Noise level Range: 0 to 422
Default: 10
Note
Noise Level
The maximum and minimum color changes within the edge detection region are determined. If the difference
is less than the noise level, it is assumed that there are no edges. Normally there is no problem with the
default value of 10, but if noise is mistakenly detected as an edge, make this value higher.
Within the Region
Max. color change − Min. color change < Noise level → No edge found → Measurement result: NG
Max. color change − Min. color change ≥ Noise level → Edge found → Perform measurement
Measurement
region
60 − 15 > 30
Judges that there is an edge and performs measurements.
FQ User's Manual
− [Edge Position] − [Modify] − [Details] Tab Page
Description
Set the color change level to detect as an edge.
The edge point is found based on a threshold that is set for a color change.
Important
If you change the edge level, perform teaching again.
100% Maximum color change
50%
Edge level
0%
Minimum color change
− [Edge Position] − [Modify] − [Details] Tab Page
Description
Sets the density level to be considered as noise.
If the difference between the maximum and minimum color changes in the
region is below the noise level, it will be assumed that there is no edge.
Increase this value if noise is incorrectly detected as an edge.
Important
If you change the noise level, perform teaching again.
Max. color
change: 60
Min. color
change: 15
Measurement
region
25 − 10 < 30
Judges that there is no edge (measurement result is NG).
Inspecting with the Edge Position Inspection Item
Max. color
change: 25
Min. color
change: 10
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