Traversing With Feedforward Control, Ffwon, Ffwof - Siemens SINUMERIK 840DE Programming Manual

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References: Functional description /FB1/; B1; "Smoothing the path velocity"

Traversing with feedforward control, FFWON, FFWOF

Using feedforward control the velocity-dependent overtravel in path traversing is reduced to

zero. Traversing with feedforward control permits higher path accuracy and thus improved

machining results.

Fundamentals

Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1

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.

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.

Activate feedforward control

Deactivate feedforward control

5.6 Traversing with feedforward control, FFWON, FFWOF

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