HEIDENHAIN iTNC 530 (340 49x-04) Touch Probe Cycles - Manual (Page 97)

HEIDENHAIN iTNC 530 97
3.2 Pr
eset
ting aut
o
matically
DATUM IN TOUCH PROBE AXIS (touch probe
cycle 417, DIN/ISO: G417)
Touch probe cycle 417 measures any coordinate in the touch probe
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 positive direction of the touch probe
axis.
2 Then the touch probe moves in its own axis to the coordinate
entered as starting point
1 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) and saves the actual values in the Q parameters listed
below
 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.
 1st measuring point in 3rd axis Q294 (absolute):
coordinate of the first touch point in the touch probe
axis.
 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
1
X
Z
Q260
Q294
MP61
40
+
Q320
1
Parameter number Meaning
Q160 Actual value of measured point
Before programming, note the following
Before a cycle definition you must have programmed a
tool call to define the touch probe axis. The TNC then sets
the datum in this axis.