Omron F250-UME Software Manual page 302

Density Defects
2-14-2 Setting Measurement Regions
Defect (Line, Circumference, Arc, Region)
Line
Circumference
and Arc
Region
CHECK
CHECK
Defect (Variable Box)
2-14-(4)
Up to 8 regions can be set.
There are 6 measurement methods for density defect inspections and different
methods can be set for each region. Select the best method for the inspection.
Use this function to inspect for defects, blemishes, chips, or burrs on unpat-
terned measurement objects.
Select either line, circumference, arc, or region depending on the shape of the
measurement object and the inspection details.
Select line searches when inspecting for chips or burrs on a measurement
object.
Use circumference or arc searches when inspecting for chips or burrs on a cir-
cular measurement object.
Select region when inspecting the whole measurement object for defects or
blemishes. Up to 3 figures can be combined when drawing the measurement
region (box, ellipse, circle, circumference, or polygon).
Inspections cannot be performed correctly on measurement objects that are
patterned or marked.
The inspection is performed using changes in density and any pattern or mark
in the measurement region will be detected as a surface defect. Use the Fine
Matching inspection item to inspect regions with patterns or marks.
Use the Defect (Var. Box) processing item for measurement objects with vary-
ing measurement region sizes or positions.
Use the Defect (Var. Box) processing item to adjust the measurement region
(a box) for measurement objects with varying sizes or positions to inspect for
defects.
Measurement region
Measurement
region
Measurement region
Section 2-14