HEIDENHAIN iTNC 530 (60642x-03) ISO programming - Manual (Page 514)

514 Manual operation and setup
14.9 D
a
tu
m set
ting with a t
o
uc
h pr
obe
Circle center as datum
With this function, you can set the datum at the center of bore holes,
circular pockets, cylinders, studs, circular islands, etc.
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.
 Position the touch probe approximately in the center of the circle
 Select the probe function: Press the PROBING CC
soft key
 Probing: press the NC Start button four times. The
touch probe touches four points on the inside of the
circle
 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
 If you are not probing to find the stylus center, press
the END key
 Datum : In the menu window, enter both coordinates of
the circle center, confirm with the SET DATUM soft
key, or write the values to a table (see "Writing the
measured values from touch probe cycles in datum
tables", page 500, or see "Writing the measured
values from touch probe cycles in the preset table",
page 501)
 To terminate the probe function, press the END key
Outside circle:
 Position the touch probe at a position near the first touch point
outside of the circle
 Select the probe direction by soft key
 Probing: press the NC Start button
 Repeat the probing process for the remaining three points. See
figure at lower right
 Datum : Enter the coordinates of the datum and confirm your entry
with the SET DATUM soft key, or write the values to a table (see
"Writing the measured values from touch probe cycles in datum
tables", page 500, or see "Writing the measured values from touch
probe cycles in the preset table", page 501, or see "Storing
measured values in the pallet preset table", page 502)
 To terminate the probe function, press the END key
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–
X
Y
X+
X–
Y+
Y–