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Machine operating area 01/2008
4.2 General functions and displays
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© Siemens AG 2008 All rights reserved.
4-96 SINUMERIK 840Di sl/840D sl/840D Operating Manual HMI-Advanced (BAD) - 01/2008 Edition
4.2.3 Switching over the machine/workpiece coordinate system (MCS/WCS)
Function
The display can be toggled between the machine and workpiece
coordinate systems by means of special key "MCS/WCS" on the MCP
or via softkeys (depending on MCP model and user program). The
actual position display for the distance-to-go and the corresponding
axes change.
Machine axes
Machine axes are axes that actually exist on the machine and have
been parameterized during installation.
Geometry axes and
special axes
These are the axes programmed in the part program. Geometry axes and
special axes are offset by the selected work offset relative to the machine
axes.
Three is the maximum number of Cartesian geometry axes.
MCS
The machine coordinate system (= MCS) refers to the coordinates of
the machine axes, i.e., all machine axes are displayed in the machine
coordinate system.
Machine position Repos offset
X
Y
Z
WCS
An offset (e.g., work offset, rotation) can be used to set up a
relationship, e.g., with the workpiece clamp. This relationship defines
the position of the workpiece coordinate system (= Work) in relation to
the machine coordinate system. The workpiece is always represented
in a Cartesian coordinate system.
All geometry axes and special axes are displayed in the workpiece
coordinate system.
Work position Repos offset
X1
Y1
C1
Machine manufacturer
Machine data are used to define whether the programmed frames are
to be calculated when displaying the WCS (settable zero system =
SZS display).
Please consult the documentation provided by the machine
manufacturer!
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