HEIDENHAIN TNC 620, User Manual

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Setup | Calibrating 3-D touch probes (option 17)
5.8 Calibrating 3-D touch probes (option 17)
Introduction
In order to precisely specify the actual trigger point of a 3-D touch
probe, you must first calibrate the touch probe, otherwise the control
cannot provide precise measuring results.
Operating notes:
Always calibrate the touch probe again in the
following cases:
Initial configuration
Broken stylus
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 then become
immediately effective and it is not necessary to repeat
the tool call.
During calibration, the control 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 control 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
Soft key
Function Page
Calibrating the length 216
Measure the radius and the center
offset using a calibration ring
217
Measure the radius and the center
offset using a stud or a calibration pin
217
Measure the radius and the center
offset using a calibration sphere
217
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HEIDENHAIN | TNC 620 | User's Manual for Setup, Testing and Running NC Programs | 01/2022
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