HEIDENHAIN TNC 640 (34059x-04) ISO programming - Manual (Page 490)

Manual operation and setup
15.7 Calibrating a 3-D touch trigger probe
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TNC 640 | User's Manual for DIN/ISO Programming | 3/2014
15.7 Calibrating a 3-D touch trigger 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.
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
When you press the OK soft key after calibration,
the calibration values are applied to the active touch
probe. The updated tool data become effective
immediately, and a new tool call is not necessary.
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 or a stud of known height and known
radius to the machine table.
The TNC provides calibration cycles for calibrating the length and
the radius:
Press the TOUCH PROBE soft key
Display the calibration cycles: Press CALIBRATE
TS
Select the calibration cycle
Calibration cycles of the TNC
Soft key Function Page
Calibrating the length 491
Measure the radius and the center
offset using a calibration ring
492
Measure the radius and the center
offset using a stud or a calibration pin
492
Measure the radius and the center
offset using a calibration sphere
492