HEIDENHAIN iTNC 530 (340 49x-04) Touch Probe Cycles - Manual (Page 132)

132 3 Touch Probe Cycles for Automatic Workpiece Inspection
3.3 A
u
to
matic W
o
rk
piece Measur
ement
MEASURE RIDGE WIDTH (touch probe cycle 426,
DIN/ISO: G426)
Touch probe cycle 426 measures the position and width of a ridge. If
you define the corresponding tolerance values in the cycle, the TNC
makes a nominal-to-actual value comparison and saves the deviation
value in system parameters.
1 The TNC positions the touch probe to the starting points at rapid
traverse (value from MP6150 or MP6361) following the positioning
logic (see “Running touch probe cycles” on page 26) to the
starting point
1 . The TNC calculates the probe starting points from
the data in the cycle and the safety clearance from MP6140.
2 Then the touch probe moves to the entered measuring height and
probes the first touch point at the probing feed rate (MP6120 or
MP6360). The first probing is always in the negative direction of
the programmed axis.
3 Then the touch probe moves at clearance height to the next
starting position and probes the second touch point.
4 Finally the TNC returns the touch probe to the clearance height and
saves the actual values and the deviation in the following Q
parameters:
 First measuring point in the 1st axis Q263
(absolute): Coordinate of the first touch point in the
reference axis of the working plane.
 First measuring point in the 2nd axis Q264
(absolute): Coordinate of the first touch point in the
minor axis of the working plane.
 Second measuring point in the 1st axis Q265
(absolute): Coordinate of the second touch point in
the reference axis of the working plane.
 Second measuring point in the 2nd axis Q266
(absolute): Coordinate of the second touch point in
the minor axis of the working plane.
X
Y
1
2
Parameter number Meaning
Q156 Actual value of measured length
Q157 Actual value of the centerline
Q166 Deviation of the measured length
Before programming, note the following
Before a cycle definition you must have programmed a
tool call to define the touch probe axis.
MP6140 + Q320
Q264
Q265
X
Y
Q289
Q311
Q288
Q272=1
Q272=2
Q266
Q263