HEIDENHAIN TNC 620 User Manual page 527

Corner as datum
Select the probing function: Press the PROBING P
soft key
Position the touch probe near the first touch point
on the first workpiece edge
Select the probing direction: Select with soft key
Probe: Press the NC START key
Position the touch probe near the second touch
point on the same workpiece edge
Probe: Press the NC START key
Position the touch probe near the first touch point
on the second workpiece edge
Select the probing direction: Select with soft key
Probe: Press the NC START key
Position the touch probe near the second touch
point on the same workpiece edge
Probe: Press the NC START key
Datum: Enter both datum coordinates in the menu
window, use the SET DATUM soft key to confirm
Further Information:
from the touch probe cycles to the preset table,
page 512
Terminate the probe function by pressing the END
soft key
HEIDENHAIN only warrants the function of the touch
probe cycles if HEIDENHAIN touch probes are used.
You can identify the intersection of two straight lines
using holes or studs and set this as the datum. For
each straight line however, probing must only be with
two identical touch probe functions (e.g. two holes).
The "Corner as datum" probing cycle identifies the angle and
intersection of two straight lines. In addition to datum setting, the
cycle can also activate a basic rotation. The TNC has two soft keys
for you to determine the straight line that you wish to use for this.
The ROT 1 soft key activates the angle of the first straight line
as basic rotation and the ROT 2 soft key the angle of the second
straight line.
If you wish to activate the basic rotation in the cycle, you must
always do this before datum setting. Once you set a datum or write
to a datum or preset table the, ROT 1 and ROT 2 soft keys are no
longer displayed.
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2015
Datum setting with a 3-D touch probe 14.10
Writing measured values
14
527