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

5.4.4

Measurement and ZO determination

5.4.4.1

General information

Function
Using this measuring cycle and the _MVAR = x1xx
measuring variant, a hole, shaft, groove, a web, or a rectangle can be measured paraxially.
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".
ZO determination in a hole, on a shaft, or rectangle
ZO correction of a workpiece is applied in the abscissa and ordinate using the actual
value/setpoint difference of the position of the center point.
ZO determination in a groove or on a web
ZO correction of a workpiece is applied in measuring axis _MA (abscissa and ordinate) using
the actual value/setpoint difference of the position of the center.
Measuring cycles
Programming Manual, Release 04/2006, 6FC5398-4BP10-0BA0
5.4 CYCLE977 workpiece: Measure hole/shaft/groove/web/rectangle parallel to axes
Measuring Cycles for Milling and Machining Centers
5-65