HEIDENHAIN TNC 640 User Manual page 712

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Calibration with a stud or calibration pin

Proceed as follows for manual calibration with a stud or calibration

In the Manual operation mode, position the ball

tip above the center of the calibration pin

Select the calibration function: Press the CAL. R

Enter the outside diameter of the stud

Enter the safety clearance

Enter the start angle

Enter the number of touch points

Probe: Press the NC Start key

The 3-D touch probe probes all required touch

points in an automatic probing routine and

calculates the effective ball-tip radius. If probing

from opposite orientations is possible, the

control calculates the center offset.

Check results

Press the OK soft key for the values to take

Press the END soft key to terminate the

calibrating function.

The control logs the calibration process in the

TCHPRMAN.html file.

Refer to your machine manual.

In order to be able to determine ball-tip center

misalignment, the control needs to be specially

prepared by the machine manufacturer.

Manual Operation and Setup | Calibrating 3-D touch probes

HEIDENHAIN | TNC 640 | ISO Programming User's Manual | 10/2017