15
Press key once more to register this value in the
logbook.
Each value will thus be suitably documented so as to
allow any subsequent calculation in DELTA mode.
Enabling keys/gauge Displaying Explanation
This requires the use of a barrel-shaped contact pin.
Since the thread diameter itself needs not be deter-
mined for value capture, only the minor diameter
will be probed. This is done by activating the func-
tion key , which is used for groove measure-
ment.
One or two thread flanks are contacted by the insert
while the minor diameter is being measured. The
form of the probe insert is such that there is no
need to search for the culmination point even in the
thread axis.
During the probing operations, the probe axis must
be, as far as possible, parallel to that of the thread
to be inspected. Consequently, TESA Micro-hite
plus M has to be positioned very carefully.
The determination of a thread axis using a barrel-
shaped contact pin instead of a cone-shaped one is
by far more accurate.
This type of measuring insert provides additional
advantages such as the possibility to probe both flat
and cylindrical surfaces simultaneously, thus elimi-
nating the need for exchanging probe inserts.
Furthermore, a barrel-shaped contact pin is as reli-
able as a ball tip.
4.14
Measuring centre
distances of threads
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