HEIDENHAIN SW 68894x-02 - Manual (Page 258)

258 Teach-in mode
4.6
Thr
ead
and
under
cut
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
Feed angle, thread depth, proportioning of cuts
With some thread cycles, you can indicate the angle of infeed (thread
angle). The figures show the operating sequence at an angle of infeed
of –30° and an angle of infeed of 0°.
The thread depth is programmed for all thread cycles. The CNC PILOT
reduces the cutting depth with each cut (see figures).
Machine and control must be specially prepared by the
machine tool builder for use of this cycle. Refer to your
machine tool manual.
Remember that position changes resulting from
handwheel superimposition are no longer effective after
the cycle end or the "last cut" function.