HEIDENHAIN TNC 310 (286 140) - Manual (Page 219)

207 HEIDENHAIN TNC 310
X
Y
X+ X–
Y+
Y–
Circle center as datum
With this function, the centers of bore holes, circular pockets,
cylinders, studs, circular islands, etc. can be defined as datums.
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 direction.
ú Position the touch probe approximately in the center of the circle.
ú Select the touch probe function: Press the
PROBING CC soft key
ú To probe the workpiece, press the NC START
button four times The touch probe touches four
points on the inside of the circle.
ú If you are probing to find the stylus center (only
available on machines with spindle orientation,
depending on MP6160), press the 180° soft key
and probe another four points on the inside of the
circle.
ú If you are not probing to find the stylus center,
press the END key.
ú Datum: Enter both circle center coordinates into
the menu window, and confirm your entry with
ENT.
ú To terminate the probe function, press the END
key.
Outside circle
ú Position the touch probe at the starting position for the first touch
point outside of the circle.
ú Select the probe direction with a soft key.
ú To probe the workpiece, press the NC START button
ú Repeat the probing process for the remaining three points.See
figure at center right.
ú Enter the coordinates of the datum and confirm your entry with
ENT.
After the probing procedure is completed, the TNC displays the
coordinates of the circle center and the circle radius PR.
X
Y
X+
X–
Y+
Y–
12.2
Set
ting
the
D
a
tum with a 3-D
Touc
h
Pr
obe