5. Testing parts
5-7
Festo P.BE-CB-COMP-EN en 1102d
5.3 Influence of tolerance
Band width When a new parts type is taught, the features of all scanned
parts are recorded. The values of the registered features dif-
fer individually from each other. For each feature, there is a
value range (band width) in which test parts are graded as
“Good”. You can influence this band width by means of the
tolerance setting. Test parts, the features of which lie within
the band width or in the subsequent tolerance range, are still
accepted as good parts.
With 0 % tolerance, only those parts with features which lie
exactly within the band width of the scanned sample parts
will be accepted as good parts. Set therefore at least 1 %
tolerance. This will ensure that good parts will be classified
correctly even if their positions deviate minimally .
Set tolerance The setting is made in the Sto p status.
Stop
1. Press the button START/STOP, in order to switch the
Checkbox into the Stop status.
15
110
2. Press and hold down the START/STOP button while
you increase the tolerance value by pressing the
TEACH/STATUS button, e.g. from 5 to 10 %:
Setting range 0 ... 20 %
S tandard setting 5 %
Recommendation at least 1 %
Stop
3. Release the START/STOP button when the desired value
has been set.
The value selected will be added automatically to the data of
the parts type and saved.
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