HEIDENHAIN TNC 410 - Manual (Page 71)

58 5 Programming: Tools
Displaying the measuring results
You can display the results of tool measurement in the additional
status display when your screen layout includes PGM and T PROBE
STATUS (in the machine operating modes). The TNC then shows the
program blocks in the left and the measuring results in the right
screen window. The measuring results that exceed the permissible
wear tolerance are marked in the status display with an asterisk
“
∗
”; the results that exceed the permissible breakage tolerance are
marked with the character B.
Calibrating the TT 120 touch probe
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 120 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 120.
The TT 120 is calibrated automatically with the measuring cycle
TCH PROBE 30. 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.
ú To program the calibration cycle, press the TOUCH
PROBE key in the Programming and Editing mode of
operation.
ú Select measuring cycle 30 TT CALIBRATE: Press
TT CALIBR. soft key
ú 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)
NC sample blocks
6 TOOL CALL 1 Z
7 TCH PROBE 30.0 TT CALIBRATE
8 TCH PROBE 30.1 HEIGHT: +90
5.4 T
o
o
l
Measur
ement with the
T
T
1
2
0
T
ouc
h
Pr
obe