HEIDENHAIN TNC 426B (280 472) Touch Probe Cycles - Manual (Page 117)

HEIDENHAIN TNC 426, TNC 430 105
3.4 Special Cy
cles
MEASURING (touch probe cycle 3, available as
of NC software 280 474-xx)
Touch probe cycle 3 measures any position on the workpiece in a
selectable direction. Unlike other measuring cycles, Cycle 3 enables
you to enter the measuring path and feed rate directly. The touch
probe does not retract automatically after determining the measured
value.
1 The touch probe moves from the current position at the entered
feed rate in the defined probing direction. The probing direction
must be defined in the cycle as a polar angle.
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 If necessary, you must program the retraction of the touch probe
in a separate traversing block.
U U U U Parameter number for result : Enter the number of
the Q parameter to which you want the TNC to assign
the first coordinate (X).
U U U U Probe axis : Enter the reference axis of the working
plane (X for tool axis Z, Z for tool axis Y, and Y for tool
axis X), and confirm with ENT.
U U U U Probing angle : Angle, measured from the probing
axis, at which the touch probe is to move. Confirm
with ENT.
U U U U Maximum measuring path : Enter the maximum
distance from the starting point by which the touch
probe may move. Confirm with ENT.
U U U U Feed rate : Enter the measuring feed rate.
U U U U To end input: press the ENT key
Before programming, note the following:
With function FN17: SYSWRITE ID 990 NR 6 you can set
whether the cycle runs through the probe input X12 or
X13.
With the non-modal function M141 (available as of NC
software No. 280 476-06) you can switch off tool
monitoring in order to be able to retract the tool in a
traversing block. Make sure that you have selected the
correct disengaging direction, otherwise the touch probe
may be damaged.
Example: NC blocks
5 TCH PROBE 3.0 MEASURING
6 TCH PROBE 3.1 Q1
7 TCH PROBE 3.2 X ANGLE: +15
8 TCH PROBE 3.3 DIST +10 F100