Introduction – HEIDENHAIN TNC 620 (73498x-02) ISO programming User Manual

Page 417

Calibrating a 3-D touch trigger probe (software option Touch probe

functions)

14.7

TNC 620 | User's Manual for DIN/ISO Programming | 5/2013

417

14.7

Calibrating a 3-D touch trigger
probe (software option Touch probe
functions)

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

418

Measure the radius and the center
offset using a calibration ring

419