Heidenhain TNC 320 (340 55x-03) Touch Probe Cycles User Manual download pdf (Page 30)

2.2 Calibrating a touch trigger probe

Calibrating the effective radius and

compensating center misalignment

After the touch probe is inserted, it normally needs to be aligned

exactly with the spindle axis. The misalignment is measured with this

calibration function and compensated electronically.

The TNC rotates the 3-D touch probe by 180° for calibrating the center

misalignment. The rotation is initiated by a miscellaneous function that

is set by the machine tool builder in Machine Parameter

mStrobeUTurn.

Proceed as follows for manual calibration:

8 In the Manual Operation mode, position the ball tip in the bore of the

ring gauge.

8 To select the calibration function for the ball-tip radius

and the touch probe center misalignment, press the

CAL. R soft key.

8 Select the tool axis and enter the radius of the ring

gauge.

8 To probe the workpiece, press the machine START

button four times. The touch probe contacts a

position on the bore in each axis direction and

calculates the effective ball-tip radius.

8 If you want to terminate the calibration function at this

point, press the END soft key.

8 If you want to determine the ball-tip center

misalignment, press the 180° soft key. The TNC

rotates the touch probe by 180°.

8 To probe the workpiece, press the machine START

button four times. The touch probe contacts a

position on the bore in each axis direction and

calculates the ball-tip center misalignment.

In order to be able to determine ball-tip center

misalignment, the TNC needs to be specially prepared by

the machine manufacturer. The machine tool manual

provides further information.

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Heidenhain TNC 320 (340 55x-03) Touch Probe Cycles User Manual Page 30