Siemens SINUMERIK 840D Programming Manual page 374

A
Appendix
Terms
U
User-defined variables
V
Variable definition
W
Workpiece
Workpiece contour
Workpiece coordinate
system
Workpiece origin
Z
Zero offset
A-374
Users can define variables in the -> parts program or data block
(global user data) for their own use. A definition contains a data type
specification and the variable name. See also -> System variable.
Cycles work internally with user-defined variables.
A variable definition includes the specification of a data type and a
variable name. The variable name can be used to address the value of
the variable.
Part to be created/machined by the machine tool.
Setpoint contour of the -> workpiece to be created/machined.
The starting position of the workpiece coordinate system is the ->
workpiece origin. When programming in the workpiece coordinate
system, the dimensions and directions refer to this system.
The workpiece origin is the starting point for the -> workpiece
coordinate system. It is defined by the distance to the machine origin.
Specification of a new reference point for a coordinate system through
reference to an existing origin and a -> frame settable.
SINUMERIK FM-NC: Four independent zero offsets can be selected
for each CNC axis. 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.
External
In addition to all the offsets which define the position of the workpiece
zero, it is possible to superimpose an external zero offset
- by means of a handwheel (DRF offset) or
- from the PLC.
Programmable
It is possible to program zero offsets for all path and positioning axes
by means of the TRANS statement.
SINUMERIK 840D/840Di/810D Programming Guide Cycles (PGZ) – 11.02 Edition
A
11.02
ã Siemens AG, 2002. All rights reserved