HEIDENHAIN TNC 426B (280 472) Touch Probe Cycles - Manual (Page 51)

HEIDENHAIN TNC 426, TNC 430 39
3.1 Measur
ing W
o
rk
piece Misalignment
U U U U Center in 1st axis Q321 (absolute value): Center of
the pocket in the reference axis of the working plane.
U U U U 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.
U U U U 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.
U U U U Starting angle Q325 (absolute): angle between the
reference axis of the working plane and the first touch
point.
U U U U 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°.
X
Y
Q322
Q321
Q262
Q325
Q247
The smaller the angle, the less accurately the TNC can
calculate the circle center. Minimum input value: 5°.