HEIDENHAIN TNC 320 (340 55x-03) Touch Probe Cycles - Manual (Page 78)

78
3.2 Pr
eset
ting aut
o
matically
8 Center in 1st axis Q321 (absolute value): Center of
the pocket in the reference axis of the working plane.
8 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.
8 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.
8 Starting angle Q325 (absolute): Angle between the
reference axis of the working plane and the first touch
point.
8 Stepping angle Q247 (incremental): Angle between
two measuring points. The algebraic sign of the
stepping angle determines the direction of rotation
(- = 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°.
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°