7 calibr a ting t ouc h pr obes – HEIDENHAIN iTNC 530 (60642x-04) User Manual

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602

Manual Operation and Setup

14.7 Calibr

ting t

ouc

h pr

obes

Calibrating the effective radius and
compensating center offset

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

exactly with the spindle axis. The calibration function determines the

misalignment between touch probe axis and spindle axis and

computes the compensation.
The calibration routine varies depending on the setting of Machine

Parameter 6165 (spindle orientation active/inactive). If the function for

orienting the infrared touch probe to the programmed probe direction

is active, the calibration cycle is executed after you have pressed NC

Start once. If the function is not active, you can decide whether you

want to compensate the center misalignment by calibrating the

effective radius.
The TNC rotates the 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 6160.
Proceed as follows for manual calibration:



In the Manual Operation mode, position the ball tip inside the bore

of the ring gauge



Select the calibration function for the ball-tip radius

and the touch probe center misalignment: Press the

CAL. R soft key



Select the tool axis and enter the radius of the ring

gauge



Probing: press the NC Start button four times. The

touch probe contacts a position on the hole in each

axis direction and calculates the effective ball-tip

radius



If you want to terminate the calibration function at this

point, press the END soft key



If you want to determine the ball-tip center

misalignment, press the 180° soft key. The TNC

rotates the touch probe by 180°



Probing: press the NC Start button four times. The

touch probe contacts a position in the hole in each

axis direction and calculates the ball-tip center

misalignment

In order to be able to determine the ball-tip center

misalignment, the TNC needs to be specially prepared by

the machine manufacturer. The machine manual provides

further information.