Siemens SINUMERIK 840D sl Function Manual page 728

Punching and Nibbling (N4)
10.4 Automatic path segmentation
● The path segment unit is either mm/stroke or inch/stroke (depending on axis settings).
● If the programmed SPP value is greater than the traversing distance, then the axis is
positioned on the programmed end position without path segmentation.
● SPP = 0, reset or program end delete the programmed SPP value. The SPP value is not
deleted when punching/nibbling is deactivated.
SPN
The automatic path segmentation function SPN divides the traversing path into the
programmed number of path segments.
The following conditions apply:
● Path segmentation is active only when SON or PON is active.
● SPN has a non-modal action.
● Any previously programmed SPP value is suppressed for the block containing SPN, but is
re-activated again in the following blocks.
Supplementary conditions
● The path segmentation function is operative with linear and circular interpolation.
● If a block contains both SPN (number of strokes) and SPP (stroke path), then the number
● Path segmentation is active only in conjunction with punching or nibbling functions.
● Any programmed auxiliary functions are output before, during the first or after the last
● In the case of blocks without traversing information, the rules which govern the
728
(Exception: MD26014 $MC_PUNCH_PATH_SPLITTING = 1)
The interpolation mode remains unchanged, i.e. circles are traversed when circular
interpolation is selected.
of blocks is activated in the current block while the stroke path is activated in all blocks
that follow.
(Exception: MD26014 $MC_PUNCH_PATH_SPLITTING = 1).
sub-block.
programming of SON and PON also apply to SPP and SPN. In other words, a stroke is
initiated only if an axis motion has been programmed.
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Extended Functions