HEIDENHAIN TNC 640, User Manual, Page: 754 / 948

Manual Operation and Setup | Using a 3-D touch probe
17
754
HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
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.