Siemens SINUMERIK 840D Programming Guide

12
Punching and Nibbling 08.97
12.2 Automatic
p
ath se
g
mentation
12
840 D
NCU 572
NCU 573
840Di

Siemens AG 2000. All rights reserved
12-420
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
12.2 Automatic path segmentation
Programming
SPP=
SPN=
Explanation
SPP
Size of path section (maximum distance between strokes); modal
SPN
Number of path sections per block; non-modal
Function
Path segmentation
When punching or nibbling is active, SPP and SPN
cause the total traversing distance programmed for
the path axes to be divided into a number of path
sections of equal length (equidistant path
segmentation). Each path segment corresponds
internally to a block.
Number of strokes
When punching is active, the first stroke is executed
at the end of the first path segment. In contrast, the
first nibbling stroke is executed at the start of the first
path segment.
The number of punching/nibbling strokes over the
total traversing path is thus as follows:
Punching:
Number of strokes = number of path segments
Nibbling:
Number of strokes = number of path segments + 1
Auxiliary functions
Auxiliary functions are executed in the first of the
generated blocks.

Siemens SINUMERIK 840D Specifications

General

Series	SINUMERIK 840D
Axes	Up to 31
Channels	Up to 10
Operating System	Windows-based
Power Supply	24 V DC
Control Unit Type	CNC
Interface	Ethernet, PROFIBUS
Display	TFT color display
Interpolation	Spline
PLC	Integrated PLC
Data Storage	CompactFlash, USB