A
01/2008 Appendix
B Terms
© Siemens AG 2008 All rights reserved.
SINUMERIK 840Di sl/840D sl/840D Operating Manual HMI-Advanced (BAD) - 01/2008 Edition A-459
Scaling
Component of a → frame, which causes axis-specific alterations in the
scale.
Softkey
A key, whose name appears on an area of the screen. The choice of
softkeys displayed is dynamically adapted to the operating situation.
The freely assignable function keys (softkeys) are assigned defined
functions in the software.
Software limit switch
Software limit switches define the limits of the travel range of an axis
and prevent the slide contacting the hardware limit switches. Two
pairs of values can be assigned per axis and activated separately via
the → PLC.
Mirroring
Mirroring reverses the signs of the coordinate values of a contour, with
respect to an axis. It is possible to mirror with respect to more than
one axis at a time.
Spindles
The spindle functionality is a two-level construct:
1. Spindles: Digital speed or position controlled spindle drives
(SINUMERIK 840D)
2. Auxiliary spindles: speed-controlled spindle drives, "auxiliary
spindle" function package e.g. for driven tools.
Leadscrew error
compensation
Compensation for the mechanical inaccuracies of a leadscrew
participating in the feed. The control uses stored deviation values for
the compensation.
Spline interpolation
Using the spline interpolation function, the control is able to generate
a smooth curve from just a small number of specified interpolation
points along a setpoint contour.
Languages
The user guidance display texts and the system messages are
available in five system languages (diskette):
German, English, French, Italian, and Spanish.
The user can select two of the listed languages at a time in the
control.
Standard cycles
Standard cycles are provided for machining operations, which are
frequently repeated:
• Cycles for drilling/milling applications
• for turning technology
The available cycles are listed in the "Cycle support" menu in the
"Program" operating area. Once the desired machining cycle has
been selected, the parameters required for assigning values are
displayed in plain text.
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