HEIDENHAIN TNC 426B (280 472) ISO programming - Manual (Page 316)

HEIDENHAIN TNC 410, TNC 426, TNC 430 301
Calibrating a measuring touch probe (not TNC 410)
If the TNC displays the error message ”Stylus already in
contact,” select the menu for 3-D calibration and then
select the RESET 3D soft key.
The measuring touch probe must be calibrated
whenever the machine parameters for 3-D touch probes
are changed.
The effective length is calibrated in the same way as
with triggering touch probes. You must also enter tool
radius R2 (corner radius).
With MP6321 you can define whether the TNC should
probe to find the stylus center.
The 3-D calibration cycle for measuring touch probes enables you
to measure a standard ring gauge fully automatically. (The standard
ring gauge is available from HEIDENHAIN). Fix the standard ring
gauge to the machine table with fixing clamps.
From the data measured during calibration, the TNC calculates the
spring rate of the touch probe, the stylus deflection and the stylus
center misalignment. At the end of the calibration cycle, the TNC
automatically stores these values in the input menu.
ú In the Manual Operation mode, position the touch probe to a
position approximately in the center of the standard ring gauge
and set it to 180°.
ú Select the 3-D calibration cycle. Press the soft key CAL
3D.
ú Enter the values for stylus radius 1 and stylus radius 2.
Enter the same value for stylus radius 1 and 2 if you
are using a stylus with ball tip. Enter different values
for stylus radius 1 and 2 if you are using a stylus with a
corner radius.
ú Diameter ring gauge: The diameter is engraved on the
standard ring gauge.
ú To start the calibration cycle, press the machine START
button: The touch probe measures the standard ring
gauge in a programmed sequence of steps.
ú Rotate the touch probe to 0° as soon as the TNC asks
you to.
ú To start the calibration cycle once again to determine
center misalignment, press the machine START
button. The touch probe again measures the standard
ring gauge in a programmed sequence of steps.
12.1 T
o
u
c
h
P
robe Cy
cles in the Manual and Electr
onic Handwheel
Okap12.pm6 29.06.2006, 08:06 301