Siemens SINUMERIK 840D sl Function Manual page 1120

Glossary
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
2. External
3. Programmable
1120
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.
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.
Zero offsets can be programmed for all path and positioning axes using the TRANS
statement.
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions