Siemens sinumerik 840d Programming Manual page 423

08.97
12
840 D
NCU 572
NCU 573
If both a single axis and a path axis are programmed
in the block, then the single axis responds according
to the setting of the appropriate machine data.
1. Default setting
The path traversed by the single axis is distributed
evenly among the intermediate blocks generated by
SPP.
Example:
N10 G1 SON X10 A0
N20 SPP=3 X25 A100
As a result of the programmed distance between
strokes of 3 mm, five blocks are generated for the
total traversing distance of the X axis (path axis) of
15 mm.
The A axis thus rotates through 20° in every block.
2. Single axis without path segmentation
The single axis traverses the total distance in the
first of the generated blocks.
3. With/without path segmentation
The response of the single axis depends on the
interpolation of the path axes:
• Circular interpolation: With path segmentation
• Linear interpolation:
Response to SPN
The programmed number of path segments is
applicable even if a path axis is not programmed in
the same block.
Precondition: The single axis is defined as a
punching/nibbling axis.
 Siemens AG 2000. All rights reserved
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
12.2 Automatic path segmentation
840Di
Without path segmentation
Punching and Nibbling
100 80 100
60
40
20
1
12
2
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