General Information; Measurement And Zo Determination - Siemens SINUMERIK 840D sl Programming Manual

Measuring Cycles for Milling and Machining Centers
5.6 CYCLE979 workpiece: Measure hole/shaft/groove/rib at an angle
5.6.4

Measurement and ZO determination

5.6.4.1

General information

Function
Using this measuring cycle and the _MVAR=10x
measuring variant, a hole, shaft, groove or a web can be measured at an angle. The zero
offset (ZO) of the associated workpiece can also be determined and corrected. A possible
rotation of the workpiece is kept without changing it.
The angular position cannot be determined with this cycle.
Compensation of the ZO is executed in such a way that the actual center (position of center
on the machine, e.g.: MPX1, MPY1) includes the desired setpoint position in the workpiece
coordinate system when the compensated ZO (frame) is applied.
Mirroring can be active in a frame of the frame sequence.
Dimension factors must never be active.
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, fine offset, or coarse offset, etc.
For detailed information on specifying _KNUM for the zero offset: see Parameter description
section "Description of the most important defining parameters".
The following applies to all measuring variants with ZO determination in CYCLE979:
The difference between the setpoint (_CPA and _CPO) and the actual value of the center
point derived by the cycle determines the ZO correction (offset).
This value is monitored here with _TSA.
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Programming Manual, Release 04/2006, 6FC5398-4BP10-0BA0
Measuring cycles