Siemens SINUMERIK 840Di sl Operating Manual page 452

A
Appendix
B Terms
Geometry
Geometry axis
Velocity control
Linear interpolation
Global main
program/subprogram
H
Main program
Auxiliary functions
I
Interpolator
J
Jog
K
Channel
A-452
Description of a → workpiece in the → workpiece coordinate system.
Geometry axes are used to describe a 2- or 3-dimensional range in
the workpiece coordinate system.
In order to achieve an acceptable traverse rate on very short traverse
movements, predictive evaluation over several blocks ( Look Ahead)
can be set.
The tool travels along a straight line to the destination point while
machining the workpiece.
Each global main program/subprogram may appear only once under
its name in the directory. It is not possible to use the same program
name in different directories with different contents as a global
program.
Part program identified by a number or name, in which other main
programs, subprograms or → cycles may be called.
Auxiliary functions can be used to transfer → parameters to the →
PLC in → part programs, where they trigger reactions, which are
defined by the machine manufacturer.
Logical unit of the → NCK, which determines intermediate values for
the movements to be traversed on the individual axes, on the basis of
destination positions specified in the part program.
Control operating mode (setup operation): In JOG mode, it is possible
to set up the machine. Individual axes and spindles can be traversed
in JOG mode by means of the direction keys. Other functions
available in JOG mode are → reference point approach, →
repositioning and → preset (setting an actual value).
A channel can execute a → part program independently of the other
channels. A channel exclusively controls the axes and spindles
assigned to it. Part programs runs of various channels can be
SINUMERIK 840Di sl/840D sl/840D Operating Manual HMI-Advanced (BAD) - 01/2008 Edition
A
01/2008
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