Siemens SINUMERIK 840D Operator's Manual page 488

A
Appendix
B Terms
Path axis
Path feed
Path velocity
PG
PLC
PLC program memory
PLC programming
Polar coordinates
Polynomial interpolation
Positioning axis
A-488
Path axes are all the machining axes in the -> channel which are
controlled by the -> interpolator such that they start, accelerate, stop
and reach their end positions simultaneously.
The path feed acts on -> path axes. It represents the geometrical sum
of the feeds on the participating -> geometry axes.
The maximum programmable path velocity depends on the input
resolution. With a resolution of 0.1mm, for example, the maximum
programmable path velocity is 1000 m/min.
Programming Device
Programmable Logic Control Component of the -> NC:
Programmable controller for processing the control logic on the
machine tool.
· SINUMERIK Fm-NC:
The PLC user program of CPU 314, the user data and the basic
PLC program are stored together in the PLC user memory. A user
memory of 24 KB is available on the S7-CPU314.
· SINUMERIK 840D:
The PLC user program, the user data and the basic PLC program
are stored together in the PLC user memory. The PLC user
memory can be expanded to up to 96 KB.
The PLC is programmed with the STEP7 software. The STEP 7
programming software is based on the standard WINDOWS operating
system and incorporates the functionality of STEP5 programming with
innovative expansions and developments.
A coordinate system which defines the position of a point on a plane
in terms of its distance from the origin and the angle formed by the
radius vector with a defined axis.
Polynomial interpolation provides a means of generating a very wide
range of curves, including straight-line, parabolic and exponential
functions (SINUMERIK 840D).
An axis which performs an auxiliary movement on a machine tool (e.g.
tool magazine, pallet transport). Positioning axes are axes that do not
interpolate with the -> path axes.
SINUMERIK 840D/840Di/810D Operator's Guide HMI Advanced (BAD) – 03.04 Edition
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03.04
Ó Siemens AG, 2004. All rights reserved