HEIDENHAIN CNC PILOT 640 User Manual page 351

DIN/ISO programming | Thread cycles
Cycle run:
1 Calculates the number of cutting passes
2 Moves diagonally to the internal starting point at rapid traverse.
This point lies in front of the "starting point of thread" by the
Slop.length B. With H = 1 (or 2, 3) the current offset is taken
into account for calculating the internal starting point. The
internal starting point is calculated on the basis of the tool tip
3 Accelerates to feed rate (line B)
4 Executes a thread cut
5 Decelerates (line P)
6 Retracts to safety clearance, returns at rapid traverse, and
approaches for next pass For multiple threads, the same rate of
cut is used for each thread turn, before the next infeed motion is
executed
7 Repeats 3 to 6 until the complete thread has been cut
8 Executes air cuts
9 Returns to starting point
HEIDENHAIN | User's Manual smart.Turn and DIN Programming | 12/2017
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