Siemens SINUMERIK 840D sl Programming Manual page 233

The ZO can be specified and corrected by various methods, e.g. in various settable frames,
in various basic frames, system frames.
If _KNUM=0, there is no ZO correction.
For detailed information on specifying _KNUM for the zero offset: see Parameter description
section "Description of the most important defining parameters".
In addition to _KNUM, another item of data is required to determine the type of angular offset
in
Parameter _RA needed:
• _RA=0:
• _RA>0:
Parameter for 1-angle measurement
Parameter Data type
_MVAR
_SETVAL
_STA1
_MA
_ID
_RA
_MD
_KNUM
1) depending on planes
Measuring cycles
Programming Manual, Release 04/2006, 6FC5398-4BP10-0BA0
5.7 CYCLE998 workpiece: Angle measurement and ZO determination
Offset of rotation about 3rd axis that is not contained in _MA (neither measurement nor
offset axis)
Channel axis number of the rotary table. The angular offset is undertaken in the
translation component of the channel axis _RA.
105
1105
1001105
REAL, >0
REAL,
-45 to +45 degrees
201
1)
102
301
302
203
103
REAL, >0
0
>0
INT, 0 or 1
0, >0
Measuring Cycles for Milling and Machining Centers
Meaning
Angle measurement and ZO determination, positioning at an angle from
measuring point to measuring point
Angle measurement with differential measurement and ZO determination,
positioning at an angle from measuring point to measuring point
Angle measurement and ZO determination, paraxial positioning from
measuring point to measuring point in the offset axis
Setpoint (axis position) at measuring point 1 in the meas. axis
(for _MVAR=105 and _MVAR=1105 only)
Setpoint angle
Measuring axis: 1 (abscissa), offset axis: 2 (ordinate)
Measuring axis: 2 (ordinate), offset axis: 1 (abscissa)
Measuring axis: 1 (abscissa), offset axis: 3 (applicate)
Measuring axis: 2 (ordinate), offset axis: 1 (applicate)
Measuring axis: 3 (applicate), offset axis: 2 (ordinate)
Measuring axis: 3 (applicate), offset axis: 1 (abscissa)
Distance between measuring points P1 and P2 in offset axis
Offset of rotation about axis that is not contained in _MA
Channel axis number of rotary table
The angular offset is applied in the translation component of the channel axis
number (rotary axis).
0: positive measuring direction
1: negative measuring direction
(only for variants with paraxial intermediate positioning _MVAR=10x10x)
0: without automatic ZO correction
>0: with automatic ZO correction
(Individual values: see Parameter description section "Description of the
most important defining parameters"., Parameter _KNUM)
5-99