Siemens SINUMERIK 828D - Page 1773

Glossary
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
1773
Working area limitation
With the aid of the working area limitation, the traversing range of the axes can be further restricted in addition to
the limit switches. One value pair per axis may be used to describe the protected working area.
Working memory
RAM is a work memory in the → CPU that the processor accesses when processing the application program.
Workpiece
Part to be made/machined by the machine tool.
Workpiece contour
Set contour of the → workpiece to be created or machined.
Workpiece coordinate system
The workpiece coordinate system has its starting point in the → workpiece zero-point. In machining operations
programmed in the workpiece coordinate system, the dimensions and directions refer to this system.
Workpiece zero
The workpiece zero is the starting point for the → workpiece coordinate system. It is defined in terms of
distances to the → machine zero.
Zero offset
Specifies a new reference point for a coordinate system through reference to an existing zero point and a →
frame.
1. Settable
SINUMERIK840D: A configurable number of settable zero offsets are available for each CNC axis. The
offsets - which are selected by means of G functions - take effect alternately.
2. External
In addition to all the offsets which define the position of the workpiece zero, an external zero offset can be
overridden by means of the handwheel (DRF offset) or from the PLC.
3. Programmable
Zero offsets can be programmed for all path and positioning axes using the TRANS statement.