Siemens SINUMERIK 840D sl Function Manual page 766

Punching and Nibbling (N4)
Automatic path segmentation
MD26016 $MC_PUNCH_PARTITION_TYPE=1
In contrast to the behavior described above, here the synchronous axis travels the entire
programmed rotation path in the first sub-block of the selected path segmentation function.
Applied to the example, the C axis already reaches the programmed end position C=45
when it reaches X position X=15. It behaves in the same way in the circular interpolation
block below.
766
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Extended Functions