HEIDENHAIN TNC 620 (340 56x-02) ISO programming - Manual (Page 335)

HEIDENHAIN TNC 620 335
12.6 Calibr
a
ting 3-D T
ouc
h Pr
obes
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 calibration function determines the
misalignment between touch probe axis and spindle axis and
computes the compensation.
The calibration routine varies depending on the entry in the TRACK
column of the touch probe table (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 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:
U In the Manual Operation mode, position the ball tip in the bore of the
ring gauge
U To select the calibration function for the ball-tip radius
and the touch probe center misalignment, press the
CAL. R soft key
U Select the tool axis and enter the radius of the ring
gauge
U To probe the workpiece, press the machine START
button four times. The 3-D touch probe contacts a
position on the hole in each axis direction and
calculates the effective ball-tip radius
U If you want to terminate the calibration function at this
point, press the END soft key
U If you want to determine the ball-tip center
misalignment, press the 180° soft key. The TNC
rotates the touch probe by 180°
U To probe the workpiece, press the machine START
button four times. The 3-D touch probe contacts a
position on the hole in each axis direction and
calculates the ball-tip center misalignment
Y
X
Z
10
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.