HEIDENHAIN TNC 128 (77184x-01) - Manual (Page 305)

HEIDENHAIN TNC 128 305
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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
 Start the probing procedure: Press the machine START button. If
you are not using the automatic probing routine, you need to repeat
this procedure. After the third probing operation, you can have the
TNC calculate the center (four touch points are recommended).
 Terminate the probing procedure and switch to the evaluation
menu: Press the EVALUATE soft key
 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 to datum
tables", page 295, or see "Writing the measured values from touch
probe cycles to the preset table", page 296)
 Terminate the probing function: Press the END soft key
After the probing procedure is completed, the TNC displays the
current coordinates of the circle center and the circle radius PR.