Siemens SINUMERIK 840D Operator's Manual page 484

A
Appendix
B Terms
Limit speed
Linear axis
Linear interpolation
Load memory
Look Ahead
Look Ahead for contour
violations
M
Machine
Machine axes
Machine control panel
Machine coordinate
system
Machine zero
Machining channel
A-484
Minimum/maximum (spindle) speed: The maximum speed of a spindle
can be limited by values defined in the machine data, the -> PLC or ->
setting data.
The linear axis is an axis which, in contrast to a rotary axis, describes
a straight line.
The tool travels along a straight line to the destination point while
machining the workpiece.
On the CPU 314 of the -> PLC, the load memory is identical with the
-> working memory.
The Look Ahead function is a means of optimizing the machining
velocity by looking ahead over a parameterizable number of
traversing blocks.
The control detects and reports the following types of collision:
1. Path is shorter than tool radius.
2. Width of inside corner is less than the tool diameter.
Control operating area
Axes which exist physically on the machine tool.
An operator panel on a machine tool with operating elements such as
keys, rotary switches, etc. and simple indicators such as LEDs. It is
used for direct control of the machine tool via the PLC.
System of coordinates based on the axes of the machine tool.
A fixed point on the machine tool which can be referenced by all
(derived) measurement systems.
A channel structure makes it possible to reduce downtimes by
allowing sequences of motions to be executed in parallel. For
example, a loading gantry can execute its movements during a
machining operation. In this case, a CNC channel ranks as an
autonomous CNC control complete with decoding, block preparation
and interpolation.
SINUMERIK 840D/840Di/810D Operator's Guide HMI Advanced (BAD) – 03.04 Edition
A
03.04
Ó Siemens AG, 2004. All rights reserved