HEIDENHAIN TNC 620 (81760x-02) ISO programming - Manual (Page 482)

Manual operation and setup
14.10 Datum setting with 3-D touch probe (option 17)
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TNC 620 | User's ManualDIN/ISO Programming | 2/2015
Corner as datum
Select the touch probe function: Press the
PROBING P soft key
Position the touch probe near the first touch point
on the first workpiece edge
Select the probe direction by soft key
Start the probing procedure: Press the machine
START button
Position the touch probe near the second touch
point on the same workpiece edge
Start the probing procedure: Press the machine
START button
Position the touch probe near the first touch point
on the second workpiece edge
Select the probe direction by soft key
Start the probing procedure: Press the machine
START button
Position the touch probe near the second touch
point on the same workpiece edge
Start the probing procedure: Press the machine
START button
Datum: Enter both datum coordinates into the
menu window, and confirm your entry with the
SET DATUM soft key, or see "Writing measured
values from the touch probe cycles in the preset
table", page 467)
To terminate the probe function, press the END
soft key
HEIDENHAIN only gives warranty for the function of
the probing cycles if HEIDENHAIN touch probes are
used.
You can identify the intersection of two straight lines
by holes or studs and set this as the datum. For each
straight line however, probing must only be with two
identical touch probe functions (e.g. two holes).
The "Corner as datum" probing cycle identifies the angle and
intersection of two straight lines. In addition to datum setting, the
cycle can also activate a basic rotation. The TNC has two soft keys
for you to decide which straight line you wish to use for this. The
soft key
ROT 1 activates the angle of the first straight line as basic
rotation and the soft key ROT 2 the angle of the second straight
line.
If you wish to activate the basic rotation in the cycle, you must
always do this before datum setting. After you set a datum or write
to a zero point or preset table the
ROT 1 and ROT 2 soft keys are
no longer displayed.