HEIDENHAIN iTNC 530 (340 49x-04) Touch Probe Cycles - Manual (Page 83)

HEIDENHAIN iTNC 530 83
3.2 Pr
eset
ting aut
o
matically
 Center in 1st axis Q321 (absolute value): Center of
the pocket in the reference axis of the working plane.
 Center in 2nd axis Q322 (absolute value): Center of
the pocket in the minor axis of the working plane. If
you program Q322 = 0, the TNC aligns the hole center
to the positive Y axis. If you program Q322 not equal
to 0, then the TNC aligns the hole center to the
nominal position.
 Nominal diameter Q262: Approximate diameter of the
circular pocket (or hole). Enter a value that is more
likely to be too small than too large.
 Starting angle Q325 (absolute): Angle between the
reference axis of the working plane and the first touch
point.
 Stepping angle Q247 (incremental): Angle between
two measuring points. The algebraic sign of the
stepping angle determines the direction of rotation
(negative = clockwise) in which the touch probe
moves to the next measuring point. If you wish to
probe a circular arc instead of a complete circle, then
program the stepping angle to be less than 90°.
 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.
 Traversing to clearance height Q301: Definition of
how the touch probe is to move between the
measuring points:
0: Move at measuring height between measuring
points
1: Move at clearance height between measuring points
 Datum number in table Q305: Enter the number in the
datum or preset table in which the TNC is to save the
coordinates of the pocket center. If you enter Q305=0,
the TNC automatically sets the display so that the new
datum is on the pocket center.
X
Y
Q322
Q321
Q262
Q325
Q247
X
Z
Q261
Q260
MP6140
+
Q320
The smaller the angle, the less accurately the TNC can
calculate the datum. Minimum input value: 5°