HEIDENHAIN TNC 620 User Manual page 509

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 TNC carries out all pre-positioning and probing
processes automatically
The TNC 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.
Before starting the automatic probing routine, you
need to preposition the touch probe near the first
touch point. Offset the touch probe by approximately
the safety clearance (value from touch probe table
+ value from input form) opposite to the probing
direction.
For an inside circle with a large diameter, the TNC
can also preposition the touch probe on a circular
arc at the positioning 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. For prepositioning, keep in mind the starting
angle for the first probing operation (with an angle
of 0°, the TNC probes in the positive direction of the
principal axis).
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2015
Using 3-D touch probes
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