Omron F250-UME Software Manual page 328

Density Defects
CHECK
STEP 3: Setting Judgement Conditions
2-14-(30)
formed by calculating the difference between this reference position and the
measurement position.
Reference position (changed to a suitable point)
If the measurement region is changed, the reference values return to the
default setting.
1. Select Reference registration.
Region0(Defect(Deviation))
Inspected region
Reference registration
Judgement conditions
Clear
A cursor will appear at the position of the defect.
Reference registration
ENT:Set
2. To change the position, use the Up/Down and Right/Left Keys to move
the cursor.
3. Press the ENT Key.
The setting will be registered and the screen in (1.) will return.
The Controller uses the density deviation of each element in the measurement
region to determine if a defect exists. Set a deviation value between 0 and 127
for an OK judgement.
If the density deviation of all elements is at or below the set value, the judge-
ment result will be OK. If even one of the elements exceeds the value, the
judgement result will be NG.
Measure several samples and use those measurement results as a reference
for setting the judgement conditions.
Measurement position
(mark detected as a defect)
Measurement
Reference position
region
251,184
:Move
Section 2-14