Siemens SINUMERIK 840Di sl Operating Manual page 453

A
01/2008
Channel structure
Contour
Contour monitoring
Coordinate system
Offset memory
K
v
L
Linear axis
M
Machine
Machine axes
Machine coordinate
system
Machine zero
Machine control panel
Dimensions
specification, metric and
inches
MDA
© Siemens AG 2008 All rights reserved.
SINUMERIK 840Di sl/840D sl/840D Operating Manual HMI-Advanced (BAD) - 01/2008 Edition
coordinated by → synchronization.
The channel structure makes it possible to process the → programs of
individual channels simultaneously and asynchronously.
Outline of the → workpiece
The following error is monitored within a definable tolerance band as a
measure of contour accuracy. Overloading of the drive, for example,
may result in an unacceptably large following error. In such cases, an
alarm is output and the axes are stopped.
See → Machine coordinate system
→ Workpiece coordinate system
Data range in the control, in which the tool offset data are stored.
Servo gain factor, a control variable in a control loop.
The linear axis is an axis, which, in contrast to a rotary axis, describes
a straight line.
Operating area of the control.
Physically existent axes on the machine tool.
A coordinate system, which is related to the axes of the machine tool.
A fixed point on the machine tool, which can be referenced by all
(derived) measuring systems.
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 to directly influence the machine tool via the PLC.
Position and pitch values can be programmed in inches in the
machining program. The control is set to a basic system regardless of
the programmable dimensional specification (G70/G71).
Control operating mode: Manual Data Automatic. In the MDA mode,
individual program blocks or block sequences with no reference to a
main program or subprogram can be input and executed immediately
afterwards through actuation of the NC start key.
A
Appendix
B Terms
A-453