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No. 99MBC071A
5.3.5 Applied measurement with automatic workpiece detection
If a workpiece of the specified range of dimension enters the measuring region, measurement
will be automatically started.
(a) (b) (c) (n)
D
L
b
a
Workpiece flow V mm/s
D = 5.0
±0.0015
mm, L = 12 mm, chamfer a = 0.5 mm, b = 0.5 mm, and V = 50 mm/s.
• Basic setup
Select the diameter detection method for automatic workpiece detection, and specify 16 for
the detecting speed (number of scans).
• Function setup
1. Segment = 2
2. Number of scans for averaging = 256
Set to the maximum value of (Measurement interval) < (L- 2a) / V.
3. GO/NG judgment
a. Lower limit = 4.9985 mm
b. Upper limit = 5.0015 mm
4. Analog output
a. Reference value = 5.0 mm
b. Scale value = 1
To be set if used.
5. Automatic workpiece detection
a. Number of measurements n = 1
b. Invalidation period t = 50 ms
t > (a / V)
c. Lower detection limit L = 4.9 mm
Set using the dimension excluding the chamfered portion.
d. Upper detection limit H = 5.1 mm
NOTE About automatic workpiece detection
If sequentially fed workpieces have a small chamfer and they are almost in contact,
workpieces may not be clearly identified. If this is the case, use connection rods, for
example, for adequate intervals.
In addition, allow a sufficient margin for the invalidation period and upper and lower
detection limits.
