HEIDENHAIN TNC 620 Programming Station, User Manual

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Manual Operation and Setup
14.7 Using a 3-D touch probe (option 17)
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HEIDENHAIN | TNC 620 | ISO Programming User's Manual | 9/2016
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 the touch probe
table + value from the input form) opposite to the
probing direction.
For inside circles with large diameters, the TNC can
also pre-position the touch probe on a circular arc
with 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.
During pre-positioning, note the starting angle for
the first probe process (at 0° the TNC probes in the
positive direction of the principal axis).