HEIDENHAIN TNC 640 (34059x-01) - Manual (Page 457)

HEIDENHAIN TNC 640 457
14.6 Calibr
a
ting a 3-D T
o
uc
h Pr
obe
14.6 Calibrating a 3-D Touch Probe
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