HEIDENHAIN TNC 640 (34059x-04) Cycle programming - Manual (Page 533)

MEASURE (Cycle 3) 18.2
18
TNC 640 | User's Manual Cycle Programming | 3/2014
533
18.2 MEASURE (Cycle 3)
Cycle run
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 range
SET UP and feed rate
F directly. Also, the touch probe retracts by a definable value after
determining the measured value
MB.
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. The TNC does not conduct any
length or radius compensations. You define the number of the
first result 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.
Please note while programming:
The exact behavior of Touch Probe Cycle 3 is
defined by your machine tool builder or a software
manufacturer who uses it within specific touch probe
cycles.
The DIST (maximum traverse to touch point) and F
(probing feed rate) data from the touch-probe table,
which are effective in other measuring cycles, do not
apply in Touch Probe Cycle 3.
Remember that the TNC always writes to four
successive Q-parameters.
If the TNC was not able to determine a valid touch
point, the program is run without error message. In
this case the TNC assigns the value –1 to the 4th
result parameter so that you can deal with the error
yourself.
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.
With function
FN17: SYSWRITE ID 990 NR 6 you can
set whether the cycle runs through the probe input
X12 or X13.