HEIDENHAIN TNC 620 User Manual page 234

5
Outside circle:
Position the touch probe at a position near the
first touch point outside of the circle
Select the touch probe function: Press the
PROBING CC soft key
Select the soft key for the desired probing
direction
Probe: Press the NC Start key. The touch probe
probes the inside wall of the circle in the selected
direction. Repeat this process. After the third
probing process, you can have the control
calculate the center (four touch points are
recommended)
Terminate the probing procedure and switch to
the evaluation menu: Press the EVALUATE soft
key
Preset: Enter the coordinates of the preset
Apply with the SET PRESET soft key
Further information: "Writing measured values
from the touch probe cycles to a datum table",
Page 213
Further information: "Writing measured values
from the touch probe cycles to the preset table",
Page 214
Terminate the probing function: Press the END
soft key
Once the probing routine is completed, the control displays the
current coordinates of the circle center and the circle radius.
234
Setup | Presetting with a 3-D touch probe (option number 17)
HEIDENHAIN | TNC 620 | User's Manual for Setup, Testing and Running NC Programs | 01/2022