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Thread run-in / thread run-out, 6 thr ead and under cut cy cles – HEIDENHAIN SW 68894x-02 User Manual

Page 259

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HEIDENHAIN CNC PILOT 640

259

4.6

Thr

ead

and

under

cut

cy

cles

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.