HEIDENHAIN TNC 620 User Manual page 531

Setting a center line as datum
Select the probing function: Press the PROBING
CL soft key
Position the touch probe at a position near the first
touch point
Select the probing direction with the soft key
Probe: Press the NC START key
Position the touch probe at a position near the
second touch point
Probe: Press the NC START key
Datum: Enter the datum coordinates in the menu
window, confirm with the SET DATUM soft key or
write the value to a table
Further Information:
from the touch probe cycles to a datum table,
page 511
Further Information:
from the touch probe cycles to the preset table,
page 512
Terminate the probe function: Press the soft key
END
After you have measured the second touch point,
you can use the evaluation menu to change the
direction of the centerline. Using the soft keys, you
can choose whether the datum should be set in the
principal axis, minor axis or tool axis. This may be
required if you want to save the set position on the
principal or minor axis.
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2015
Datum setting with a 3-D touch probe 14.10
Writing measured values
Writing measured values
14
531