HEIDENHAIN TNC 426B (280 472) Touch Probe Cycles - Manual (Page 125)

HEIDENHAIN TNC 426, TNC 430 113
4.2 A
v
ailable Cy
cles
Calibrating the TT
The TT is calibrated automatically with the measuring cycle TCH
PROBE 30 or TCH PROBE 480. 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.
U U U 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 MP6540)
The functioning of the calibration cycle is dependent on
MP 6500. 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
6580.0 to 6580.2.
If you change the setting of any of the machine
parameters 6580.0 to 6580.2, you must recalibrate the TT.
Example: NC blocks in old format
6 TOOL CALL 1 Z
7 TCH PROBE 30.0 TT CALIBRATE
8 TCH PROBE 30.1 HEIGHT: +90
Example: NC blocks in new format
6 TOOL CALL 1 Z
7 TCH PROBE 480 TT CALIBRATE
Q260=+100 ;CLEARANCE HEIGHT