Look-ahead detection of
1. S7-300: The keyswitch is the operating mode switch of the
-> CPU. A removable key is used to operate the keyswitch.
2. 840D/FM-NC: The keyswitch on the -> machine control panel has
4 settings, to which functions are assigned by the operating system
of the control. Three differently colored keys also belong to the
keyswitch. These keys can be pulled out of the keyswitch in the
Servo gain factor, a control variable in a control loop.
The operator guidance display texts and the system messages are
available in five system languages (diskette):
German, English, French, Italian, and Spanish
Two of the above languages are available and selectable in the
Compensation for the mechanical inaccuracies of a leadscrew
participating in the feed. The control uses stored deviation values for
Maximum/minimum (spindle) speed: The maximum speed of a spindle
may 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.
For the CPU 314 of the -> PLC, the load memory is equal to the
-> working memory.
With the look ahead function, a configurable number of traversing
blocks is read in advance in order to calculate the optimum machining
The control can recognize and signal the following types of collision:
1. The path distance is shorter than the tool radius.
2. The width of the inner corner is smaller than the tool diameter.
SINUMERIK 840D/810D Operator's Guide HMI Embedded (BEM) – 03.04 Edition
Siemens AG, 2004. All rights reserved