Heidenhain TNC 640 (34059x-04) Cycle programming Manual do Utilizador Página 537

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Calibrating a touch trigger probe 18.4
18
TNC 640 | User's Manual Cycle Programming | 3/2014
537
18.4 Calibrating a touch trigger probe
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
The TNC assumes the calibration values for the
active probe system directly after the calibration
process. 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 541
Measure the radius and the center
offset using a calibration ring
542
Measure the radius and the center
offset using a stud or a calibration
pin
544
Measure the radius and the center
offset using a calibration sphere
539
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