Panasonic PV500 User Manual page 164

Deciding Differential Threshold
Decide a threshold value of differential in detecting area. Only the areas with differential value which is higher
than this threshold are subjected to detect.
The threshold can be set in two ways, common setting and individual setting. The common setting sets the
same value for all Gray Edge cells and the individual setting sets separate values. Use the individual setting if
pins have different brightness or only some of pins are dark due to lighting condition.
1.
Select "Thresh.Adj.".
2.
Press the TRIG key to execute a test.
The detected edge differentials are displayed. Use them to set the threshold.
3.
To set threshold of Gray Edge cells individually, select "Yes" for "set Individually".
Select "No" not to employ Individual Setting.
4.
Select the threshold setting table.
5.
To employ the common setting, select the
row of "Common" and enter a value.
To use the Individual setting, select Gray Edge
cell number and enter a threshold.
6.
Press the TRIG key to execute a test.
Press the F1key to display the image and confirm that all parts are detected stably.
Setting Judgement Limits
Set a tolerance (maximum and minimum values) of the values of detected widths. If the detected widths are
within the tolerance, the object will be judged as "OK", if it is out of it, the object will be judged as "NG". When
judgements of all widths are "OK", judgement of the checker will be "OK".
1.
Select "Judgement Limits".
2.
Input the setting values for "Max. Judge. Pitch" and "Min. Judge. Pitch".
Even when using "Width Measurement" as the execution mode, these items are displayed as "Max. Judge.
Pitch" and "Min. Judge. Pitch".
3.
After inputting is completed, press the CANCEL key.
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