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No. 99MBC071A
5.3 Applied Measurement
Perform measurement according to the conditions set.
This section gives example operations for a better understanding of the versatile functions of
this instrument.
For information about actual setup methods refer to Section 3.4, “Outline of Key Opera-
tions”, Section 4.1, “Basic Setup”, and Section 4.5, “Setting up the Functions”.
5.3.1 Diameter measurement of a precision-machined workpiece
Perform a single-run measurement and make a GO/NG judgment of the workpiece diameter.
D
Segment 1
Segment 2
Segment 3
Laser scan direction
• Suppose that D = 10
± 0.002
mm.
• Set the following:
1. Segment = 2
2. Number of scans for averaging = 512 or more
For precision measurement set a large value.
3. GO/NG criteria
a. Lower limit value = 9.998 mm
b. Upper limit value = 10.00201 mm
(If 10.002 mm is accepted as GO, add the resolution to this value. This also applies
to the following examples.)
• Measurement
PROG
BUSY
RUN
+NG
GO
-NG
1. Perform measurement in the ready state.
The GO/NG LEDs and RUN LED are off, and the
BUSY LED turns on for each measurement.
PROG
BUSY
RUN
+NG
GO
-NG
2. Start a single-run measurement. “ ”
will be displayed in the lower section of the display
unit. Also, the RUN LED lights and stays lit.
PROG
BUSY
RUN
+NG
GO
-NG
3. After the set measurement interval (approximately
0.64 seconds, for 512 times averaging), the BUSY
LED lights for a moment, then the measured data is
latched on the display.
The measured data is subjected to GO/NG judgment,
and the result will be outputted on the GO/NG
LEDs. It will also be, depending on the setup,
outputted to the RS-232C (printer)/GP-IB and
Digimatic Code Output Unit.
TIP About the number of scans for averaging and repeatability
If high accuracy is required, select the largest number of scans for averaging pos-
sible.
In general, doubling the number of scans for averaging improves repeatability by 1.4
times.
