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

14.8

Traversing with feedforward control, FFWON, FFWOF

Function
The feedforward control reduces the velocity-dependent overtravel when contouring towards
zero. Traversing with feedforward control permits higher path accuracy and thus improved
machining results.
Syntax
FFWON
FFWOF
Significance
FFWON:
FFWOF:
Note
The type of feedforward control and which path axes are to be traversed with feedforward
control is specified via machine data.
Default: Velocity-dependent feedforward control
Option: Acceleration-dependent feedforward control
Example
Program code
N10 FFWON
N20 G1 X... Y... F900 SOFT
Fundamentals
Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
14.8 Traversing with feedforward control, FFWON, FFWOF
Command to activate the feedforward control
Command to deactivate the feedforward control
Supplementary commands
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