HEIDENHAIN SW 68894x-03 - Manual (Page 273)

HEIDENHAIN CNC PILOT 640 273
4.6 Thr
ead and under
c
ut cy
cles
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).
Thread run-in / thread run-out
The slide requires a run-in distance to accelerate to the programmed
feed rate before starting the actual thread, and a run-out distance at
the end of the thread to decelerate again.
If the run-in / run-out length is too short, the thread may not attain the
expected quality. In this case, the CNC PILOT displays a warning.