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

Examples
Example 1: Activate dynamic values
Program code
DYNNORM G1 X10
DYNPOS G1 X10 Y20 Z30 F...
DYNROUGH G1 X10 Y20 Z30 F10000
DYNSEMIFIN G1 X10 Y20 Z30 F2000
DYNFINISH G1 X10 Y20 Z30 F1000
Example 2: Read or write a specific field element
Maximum acceleration for roughing, axis X
Program code
R1=$MA_MAX_AX_ACCEL[2,X]
$MA_MAX_AX_ACCEL[2,X]=5
10.4

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
Meaning
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
Job Planning
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
: Command to activate the feedforward control
: Command to deactivate the feedforward control
10.4 Traversing with feedforward control (FFWON, FFWOF)
Comment
; Basic position
; Positioning mode, tapping
; Roughing
; Finishing
; Smooth finishing
Comment
; Read
; Write
Path traversing behavior
463