HEIDENHAIN SW 68894x-03 - Manual (Page 272)

272 Teach-in mode
4.6 Thr
ead and under
c
ut cy
cles
Handwheel superimposition
If your machine features handwheel superimposition, you can overlap
axis movements during thread cutting in a limited area:
 X direction: Maximum programmed thread depth depending on the
current cutting depth
 Z direction: +/- a fourth of the thread pitch
Machine and control must be specially prepared by the
machine tool builder for use of this cycle. Refer to your
machine manual.
Remember that position changes resulting from
handwheel superimposition are no longer effective after
the cycle end or the "last cut" function.