Siemens SINUMERIK 840Di sl Programming Manual page 221

Parameter
Machine manufacturer
Limit values that can be configured in relation to (specially) adjustable parameters of the
parts program, using machine data:
• lengthening the machining time
• Input of the natural frequencies of the operated axes
• Taking the programmed feedrate into account.
Fundamentals
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
The machining time of the part program is specified as percentage. The actual
lengthening is according to the worst case of all acceleration processes inside the part
program and can even be zero.
Only acceleration processes that lead to clear excitation of machine axes should be
removed.
In this case the smoothing factor is observed especially exactly if the override is set to
100%.
Note
Variations in path velocity due to the input of a new feedrate are not changed either. This
remains the responsibility of the programmer of the subprogram.
Note
If a short acceleration takes place during a machining function with high path velocity,
and is thus followed almost immediately by braking, the reduction in the machining time is
only minimal. Acceleration of this kind can, however, have undesirable effects if, for
example, it results in machine resonance.
Path Action
5.5 Smoothing the path velocity
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