HEIDENHAIN TNC 640 (34059x-05) - Manual (Page 554)

Manual operation and setup
15.8 Calibrating a 3-D touch trigger probe
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TNC 640 | User's Manual
HEIDENHAIN Conversational Programming | 1/2015
Calibrating the effective length
HEIDENHAIN only gives warranty for the function of
the probing cycles if HEIDENHAIN touch probes are
used.
The effective length of the touch probe is always
referenced to the tool datum. The machine tool
builder usually defines the spindle tip as the tool
datum.
Set the datum in the spindle axis such that for the machine tool
table Z=0.
Select the calibration function for the touch
probe length: Press the
CAL. L soft key. The TNC
displays the current calibration data.
Datum for length: Enter the height of the ring
gauge in the menu window
Move the touch probe to a position just above the
ring gauge
To change the traverse direction (if necessary),
press a soft key or an arrow key
To probe the upper surface of the ring gauge,
press the machine START button
Checking the results
Press the
OK soft key for the values to take effect
Press the
CANCEL soft key to terminate the
calibrating function. The TNC logs the calibration
process in TCHPRMAN.html.