Siemens SINUMERIK 840D Programming Manual page 330

4
Turning Cycles
4.10 Extended stock removal cycle – CYCLE950 (SW 5.3 and higher)
Description of parameters
_NP1, _NP2, _NP3 (contour programming finished part)
The finished part contour can be programmed optionally in a
separate program or in the current main program that calls
the routine. The data are transferred to the cycle via
parameters _NP1 – Name of the program or _NP2, _NP3 –
ID of program section from ... to using block numbers or
labels.
So there are three options for contour programming:
• The contour is defined in a separate program – in which
case only _NP1 need be programmed;
(see programming example 1)
• The contour is defined in the calling program in which
case only _NP2 and _NP3 have to be programmed;
(see programming example 2)
• The stock removal contour is part of a program but not
part of the program that calls the cycle in which case all
three parameters must be programmed.
When the contour is programmed as a program section, the
last contour element (block with label or block number end of
blank contour) must not contain a radius or chamfer.
Write the program name in _NP1 with path name and
program type.
Example:
_NP1= " /_N_SPF_DIR/_N_PART1_SPF "
_NP4 (name of the stock removal program)
The stock removal cycle generates a program for the travel
blocks that are required for stock removal between the blank
and the finished part. This program is stored in the same
directory as the calling program in the parts program
memory if no other path is specified when it is generated. If a
path is entered, it is stored accordingly in the file system.
The program is a main program (type MPF) if no other type
is specified.
Parameter _NP4 defines the name of this program.
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SINUMERIK 840D/840Di/810D Programming Guide Cycles (PGZ) – 11.02 Edition
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03.96
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