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Angle Measurement - Siemens SINUMERIK 840D sl Programming Manual

Measuring cycles hmi sl.
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5.7.2

1-angle measurement

5.7.2.1
General information
Function
Using this measuring cycle and the _MVAR=x0x105
measuring variants, it is possible to determine the angular position of a surface in the plane
of the workpiece coordinate system.
This can be used to determine and correct the rotation component in the zero offset (ZO,
frame) of the workpiece in the plane.
The rotation is corrected in such a way that the real position of the surface (actual value)
adopts the required set angle (_STA1) in the workpiece coordinate system when the
corrected ZO (frame) is used.
The ZO to be corrected is specified in coded form with variable _KNUM >0.
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:
Measuring cycles
Programming Manual, 03/2009 Edition, 6FC5398-4BP10-2BA0
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.
Measuring Cycles for Milling and Machining Centers
193

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