Siemens SINUMERIK 840D sl Function Manual page 166

G1: Gantry axes
2.4 Start-up of gantry axes
• Always use an offset of 0 for the function generator and measuring function in contrast to
the recommendations for normal axes.
• Set the amplitudes for function generator and measuring function to such low values that
the activated axis traverses a shorter distance than the position tolerance allows. Always
activate the traversing range limits as a check (see above).
Reference:
Function Manual, Drive Functions, Speed Control Loop (DD2)
Note
As a supplement to the more general description given here of features of start-up and
dynamic control response of drives, a complete example of a concrete constellation defined
on the basis of its machine data can be found in Chapter "Example".
Start-up support for gantry groupings
The start-up functions of the function generator and measuring are parameterized via the PI
service. All parameterized axes commence traversing when the NC Start key on the MCP
panel is pressed in JOG mode.
A window is displayed in the "Measuring function and function generator in gantry grouping"
operator interface. Two amplitude values, each with an offset and bandwidth, must be
entered in this window. The first amplitude value applies to the measuring axis and the
second to the other coupled axes.
166
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Special Functions