HEIDENHAIN TNC 640 (34059x-01) Cycle programming - Manual (Page 533)

HEIDENHAIN TNC 640 533
20.2 Calibr
a
ting the T
T
(C
y
c
le 30 or 480, DIN/ISO: G480)
20.2 Calibrating the TT (Cycle 30 or 480,
DIN/ISO: G480)
Cycle run
The TT is calibrated with the measuring cycle TCH PROBE 30 or TCH
PROBE 480 (see also "Differences between Cycles 31 to 33 and
Cycles 481 to 483" on page 529). The calibration process is automatic.
The TNC also measures the center misalignment of the calibrating tool
automatically by rotating the spindle by 180° after the first half of the
calibration cycle.
The calibrating tool must be a precisely cylindrical part, for example a
cylinder pin. The resulting calibration values are stored in the TNC
memory and are accounted for during subsequent tool measurement.
Please note while programming:
Cycle parameters
U Clearance height: Enter the position in the spindle
axis at which there is no danger of collision with the
workpiece or fixtures. The clearance height is
referenced to the active workpiece datum. If you
enter such a small clearance height that the tool tip
would lie below the level of the probe contact, the
TNC automatically positions the tool above the level
of the probe contact (safety zone from
safetyDistStylus
). Input range -99999.9999 to
99999.9999
The functioning of the calibration cycle is dependent on
machine parameter CfgToolMeasurement. Refer to your
machine manual.
Before calibrating the touch probe, you must enter the
exact length and radius of the calibrating tool into the tool
table TOOL.T.
The position of the TT within the machine working space
must be defined by setting the Machine Parameters
centerPos
> [0] to [2].
If you change the setting of any of the Machine
Parameters centerPos > [0] to [2], you must recalibrate.
Example: NC blocks in old format
6 TOOL CALL 1 Z
7 TCH PROBE 30.0 CALIBRATE TT
8 TCH PROBE 30.1 HEIGHT: +90
Example: NC blocks in new format
6 TOOL CALL 1 Z
7 TCH PROBE 480 CALIBRATE TT
Q260=+100 ;CLEARANCE HEIGHT