Festo Checkbox Identbox, Manual

Page: 131 / 158

A. Technical appendix
A-17
Festo P.BE-Checkbox-EN en 0103c
Example Ascertaining the bandwidth for the feature “Length” of a con-
veyed part with a set tolerance of 5 % (display on the LCD
TOLERANCE).
Conveyed part lengths [mm] for 5 sample parts ascertained
during the teach procedure: 60
60 61 65 60
Therefore:
A = 61.2 mm
C
max
= 65 mm
C
min
= 60 mm
T = 5 %
Average value of the length
Length - maximum
Length - minimum
Tolerance
B
=
C
max
−
C
min
+
2
×
T
×
A
100
B
=
(65
−
60)
+
2
×
5
×
61.2
100
B
=
11.12
1 2
68.06
65.00
61.20
60.00
56.94
C
max tol
C
max
O
C
min
C
min tol
B
1
Bandwidth of conveyed part length
2
Bandwidth with 5 % tolerance
Result: All conveyed parts with a length of 57...68 mm are
classified as good parts. The Checkbox ascertains appropri-
ate value ranges for each feature.