HEIDENHAIN iTNC 530 (340 49x-04) Touch Probe Cycles - Manual (Page 102)

102 3 Touch Probe Cycles for Automatic Workpiece Inspection
3.2 Pr
eset
ting aut
o
matically
DATUM IN ONE AXIS (touch probe cycle 419,
DIN/ISO: G419)
Touch probe cycle 419 measures any coordinate in any axis and
defines it as datum. If desired, the TNC can also enter the measured
coordinate in a datum table or preset table.
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
programmed starting point
1 . The TNC offsets the touch probe by
the safety clearance in the direction opposite the programmed
probing direction.
2 Then the touch probe moves to the programmed measuring height
and measures the actual position with a simple probing
movement.
3 Finally the TNC returns the touch probe to the clearance height and
processes the determined datum depending on the cycle
parameters Q303 and Q305. (see “Saving the calculated datum”
on page 69)
 1st measuring point in 1st axis Q263 (absolute):
coordinate of the first touch point in the reference
axis of the working plane.
 1st measuring point in 2nd axis Q264 (absolute):
coordinate of the first touch point in the minor axis of
the working plane.
 Measuring height in the touch probe axis Q261
(absolute): Coordinate of the ball tip center (= touch
point) in the touch probe axis in which the
measurement is to be made.
 Setup clearance Q320 (incremental): Additional
distance between measuring point and ball tip. Q320
is added to MP6140.
 Clearance height Q260 (absolute): Coordinate in the
touch probe axis at which no collision between tool
and workpiece (fixtures) can occur.
X
Y
Q264
Q263
+
–
– +
Q267
Q272=2
Q272=1
MP6140 + Q320
1
X
Z
Q260
Q261
+
–
Q272=1
Q272=3 Q267
1
Before programming, note the following
Before a cycle definition you must have programmed a
tool call to define the touch probe axis.