6 calibrating 3-d touch probes, Introduction – HEIDENHAIN TNC 620 (73498x-01) ISO programming User Manual
Page 365
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HEIDENHAIN TNC 620
365
13.6 Calibr
ating 3-D t
ouc
h pr
obes
13.6 Calibrating 3-D touch probes
Introduction
In order to precisely specify the actual trigger point of a 3-D touch
probe, you must calibrate the touch probe, otherwise the TNC cannot
provide precise measuring results.
During calibration, the TNC finds the "effective" length of the stylus
and the "effective" radius of the ball tip. To calibrate the 3-D touch
probe, clamp a ring gauge of known height and known internal radius
to the machine table.
Always calibrate a touch probe in the following cases:
Commissioning
Stylus breakage
Stylus exchange
Change in the probe feed rate
Irregularities caused, for example, when the machine
heats up
Change of active tool axis
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