19
Procedures for relative measurement:
a.
)First move the standard sample between the two cap-shaped measuring accessories
and make them contact to find the “turn-over pint” and record the reading L
0
or reset
the display by pressing a key;
b). Move the workpiece between the two cap-shaped measuring accessories and make
them contact to find the “turn-over pint” and record the reading L
1
;
c). Workpiece actual dimension L =L
1
L
0
+ L
s
(L
s
: actual dimension of the standard
sample)
In order to ensure the measurement, repeat a) after b) is carried out to see if the value L
0
changes. If not, the value L
0
will be effective. To find shape error of the workpiece, repeat
b) several times, change the workpiece position to be measured and measure out L
2
L
3
L
4
.
For dimensions less than 100mm, we can use resolute measurement or relative
measurement but the former is easier. However, for dimensions bigger than 100mm, it is
necessary to use relative measurement and the size difference between workpiece and
standard sample shall be less than 100mm.
Fig.8 Double V-shaped racks for measuring a slender bar
5.2.2 Measuring a cone
Support the cone using the center carrier, the coning K and cone angle can be calculated according to
the following formula:
Summary of Contents for EX-100
Page 4: ...3 Fig 3...
