Measuring In 3-D (Cycle 4, Software Option 17); Cycle Run; Please Note While Programming - HEIDENHAIN TNC 620 User Manual

Touch Probe Cycles: Special Functions | MEASURING IN 3-D (Cycle 4, software option 17)
16.3 MEASURING IN 3-D (Cycle 4, software
option 17)

Cycle run

Cycle 4 is an auxiliary cycle that can be used for probing
with any touch probe (TS, TT or TL). The TNC does not
provide a cycle for calibrating the TS touch probe in any
probing direction.
Touch probe cycle 4 measures any position on the workpiece in
the probing direction defined by a vector. Unlike other measuring
cycles, Cycle 4 enables you to enter the measuring distance and
feed rate directly. You can also define the distance by which the
touch probe retracts after determining the measured value.
1 The TNC moves from the current position at the entered
feed rate in the defined probing direction. Define the probing
direction in the cycle by using a vector (delta values in X, Y and
Z)
2 After the TNC has saved the position, the TNC stops the
probing motion. The TNC saves the X, Y, Z coordinates of the
probing position in three successive Q parameters. You define
the number of the first parameter in the cycle. If you are using
a TS touch probe, the probe result is corrected by the calibrated
center offset.
3 Finally, the TNC performs a positioning movement in the
direction opposite to the direction of probing. You define the
traverse path in parameter MB—the touch probe is moved to a
point no farther than the starting point.

Please note while programming:

The TNC retracts the touch probe by no more than the
retraction distance MB and does not pass the starting
point of the measurement. This rules out any collision
during retraction.
Ensure during pre-positioning that the TNC moves the
probe-tip center without compensation to the defined
position!
Remember that the TNC always writes to four
successive Q parameters. If the TNC was not able to
determine a valid touch point, the 4th result parameter
will have the value –1.
HEIDENHAIN | TNC 620 | User's manual for cycle programming | 10/2017
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