TNC 426/TNC 425/TNC 415 B/TNC 407
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Manual Operation and Setup
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Setting the Datum with a 3D Touch Probe
Fig. 2.16: Probing the inside of a cylindrical
surface to find the center
Y
X
X–
X+
Y+
Y–
Circle center as datum
With this function you can set the datum at the center of bore holes,
circular pockets, cylinders, journals, circular islands, etc.
Select the probing function with the soft key PROBING CC.
Inside circle
The TNC automatically probes the inside wall in all four coordinate axis
directions.
For incomplete circles (circular arcs) you can choose the appropriate
probing directions.
Move the touch probe to a position approximately in the center of the circle.
X + X – Y + Y –
The probe touches four points on the inside of the circle.
Rotate the touch probe by 180° if you are probing to find the stylus
center (only available on machines with spindle orientation,
depending on MP6160). Then probe another four points on the inside
of the circle.
Terminate the probing function for finding the stylus center.
