Festo Checkbox Compact CHB-C-X Manual page 120

A. Technical appendix
Example
Festo P.BE-CB-COMP-EN en 1102d
Ascertaining the band width for the feature "Length" of a
conveyed part with a set tolerance of 5 %.
Conveyed part lengths [mm] ascertained during the Teach
procedure for 5 sample parts:
This means:
A = 61.2 mm
C = 65 mm
max
C = 60 mm
min
T = 5 %
B C C
max
min
B (65 60)
B 11, 12
B
C 68.06
max tol
C 65.00
max
A
61.20
C 60.00
min
C
56.94
min tol
1
Band width of the conveyed part length
2
Band width at 5 % tolerance
Result: All conveyed parts with a length of 57 ... 68 mm are
classified as good parts. The Checkbox ascertains
appropriate value ranges for each feature.
60 60 61 65 60
Average value of the length
Length, maximum
Length, minimum
Tolerance
2 T A
100
2 5 61.2
100
1 2
A-13