HEIDENHAIN iTNC 530 (340 49x-04) Touch Probe Cycles - Manual (Page 152)

152 3 Touch Probe Cycles for Automatic Workpiece Inspection
3.4 Special Cy
cles
MEASURING IN 3-D (touch probe cycle 4, FCL 3
function)
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 path and feed rate directly.
Also, the touch probe retracts by a definable value after determining
the measured value.
1 The touch probe 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 touch probe stops. The
TNC saves the X, Y, Z coordinates of the probe-tip center in three
successive Q parameters. You define the number of the first
parameter in the cycle.
3 Finally, the TNC moves the touch probe back by that value against
the probing direction that you defined in the parameter MB.
Before programming, note the following
The TNC retracts the touch probe by no more that the
retraction distance MB and does not pass the starting point
of the measurement. This rules out any collision during
retraction.
Remember that the TNC always writes to 4 successive Q
parameters. If the TNC could not determine a valid touch
point, the fourth result parameter will have the value –1.
With function FN17: SYSWRITE ID 990 NR 6 you can set
whether the cycle runs through the probe input X12 or
X13.