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4.6 Measurement
4.6.1 Overview of Length Measurement
In a binary image, the LightPixAE20 measures the X- and Y-directional lengths of the object in the selected
color (black or white) within the inspection ara. The unit checks whether or not the minimum and maximum
values for the detected length does not exceed the base length +/- allowable range, and it outputs the
judgement result for the maximum and mininum values to OUT2 and OUT1 respectively.
Judgement result
All OK
Both minumum and maximum values
does not exceed the base length +/-
allowable range
MAX:OK
Only maximum value is within the
allowable range
MIN: OK
Only minimum value is within the
allowable
All NG
Both maximum and minimum values
are out of range
Measurement failed
What does the length mean in the LightPixAE20?
The LightPixAE20 finds out the pixels of the object
color from left to right and from right to left within an
inspection area. The distance between the two
points detected first is a (X-directional) length. A
minimum and maximum values for the length
detected in whole scanning lines following the same
procedure are set.
If you do not want to allow the unit to search a length in some parts,
You can set the part fulfilling the following conditions as a masked part.
•
Being consisted of less than five pixels:
To not allow the unit to detect fine dusts or noise. Note that you cannot change or delete the setting
conditions.
•
Being consisted of less than the minimum value for inspection object:
"Minimum value for inspection object" is a value that is specified in the JUDGEMENT CRITERIA
SETTING /INSPECTION MINUMUN VALUE SETTING mode, and the unit is not allowed to search in
the parts having the values less than the minimum value for inspection object.
OUT2
OUT1
ON
ON
ON
OFF
OFF
ON
OFF
OFF
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