Siemens SINUMERIK 840D Programming Manual page 266

Turning Cycles
4
4.10 Extended stock removal cycle - CYCLE950 (SW 5.3 and later)
_VARI (machining type)
Parameter _VARI defines the type of machining.
Possible values are:
Units digit:
1=Longitudinal
2=Face
3=Parallel to the contour
Tens digit:
1=Programmed infeed direction X-
2=Programmed infeed direction X+
3=Programmed infeed direction Z-
4=Programmed infeed direction Z+
Hundreds digit:
1=Roughing
2=Finishing
3=Complete
Thousands digit:
1=With rounding
2=Without rounding (liftoff)
The selection with or without rounding along the
contour determines whether or stock removal
starts at the roughing intersection immediately or
whether machining is performed along the
contour up to the previous intersection so that
there are no residual corners.
Ten thousands digit:
1=Machine relief cuts
2=Do not machine relief cuts
Hundred thousands digit:
1=Programmed machining direction X-
2=Programmed machining direction X+
3=Programmed machining direction Z-
4=Programmed machining direction Z+
Example:
_VARI=312311 means machining:
longitudinal,
infeed direction X- (i.e. external),
complete;
the workpiece is not rounded along the
contour, relief cuts are machined,
machining direction Z-.
4-266
X
Finished part
contour
_FALX
1 Infeed
2 Approach
3 Roughing
Without rounding, residual corner remains
X
Finished part contour
1 Infeed
2 Approach
3 Roughing
Contour-parallel stock removal
X
Finished part contour
1 Infeed
2 Approach
3 Roughing
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide, Cycles (PGZ) - 04.00 Edition
03.96
04.00
Axis-parallel stock removal
With rounding at the contour
_MID
6
5
4
3
_SDIS
_FALZ
4 Stock removal of residual corners
(rounding)
5 Retraction
6 Returning
5
4
3
4 Retraction
5 Returning
5
4
4
3
4 Retraction
5 Returning
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1
2
Z
1
2
Z
1
2 1
2
Z