HEIDENHAIN TNC 620 User Manual page 211

Setup | Using a 3-D touch probe (option 17)
Automatic probing routine:
Pre-position touch probe
Select the probing function: Press the
PROBING CC soft key
Hole should be probed automatically: Press the
HOLE soft key
Select paraxial probing direction
Start probing function: Press the NC start key
The control carries out all pre-positioning and
probing processes automatically.
The control approaches the position at the feed rate FMAX defined in
the touch probe table. The defined probing feed rate F is used for the
actual probing operation.
Operating and programming notes:
Before starting an automatic probing routine, you
need to preposition the touch probe near the first
touch point. Offset the touch probe by approximately
the safety clearance opposite to the probing direction.
The safety clearance is derived from the sum of the
values in the touch-probe table and in the entry form.
For inside circles with large diameters, the control can
also position the touch probe on a circular arc at the
feed rate FMAX. This requires that you enter a safety
clearance for prepositioning and the hole diameter
in the input form. Position the touch probe inside
the hole at a position that is offset by approximately
the safety clearance from the wall. Take the starting
angle of the first probing process into account in pre-
positioning; for example, at a starting angle of 0° the
control will first probe in the positive direction of the
reference axis.
After the last touching process and if the opening
angle contains the value 360°, the control positions
the workpiece touch probe back to the position it had
prior to starting the probing function.
HEIDENHAIN | TNC 620 | User's Manual for Setup, Testing and Running NC Programs | 01/2022
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