Traversing With Feedforward Control: Ffwon, Ffwof - Siemens sinumerik 802d sl Operation And Programming Manual

Programming example
N10 ACC[X]=80
...
N100 ACC[X]=100
Activation
The limitation is in effect with all types of interpolation in the AUTOMATIC and MDA modes,
but not in the JOG mode and when approaching the reference point.
The value assignment ACC [...] = 100 deactivates the override (100% of the MD values) as
well as RESET and program end.
The programmed override value is also active with dry run feedrate.
Caution
A value greater than 100% may only be programmed if this load is permissible for the machine
mechanics and the drives have the corresponding reserves. Failure to adhere to the limits can
lead to damage to the mechanical parts and/or error messages.
8.3.14

Traversing with feedforward control: FFWON, FFWOF

Functionality
The feedforward control reduces the following error in the traversed path towards zero.
Traversing with feedforward control provides higher path accuracy and thus better manufac-
turing results.
Programming
FFWON
FFWOF
Programming example
N10 FFWON
N20 G1 X... Z... F900
...
N80 FFWOF
SINUMERIK 802D sl Operation and Programming Nibbling (BP-N), 06/2006 Edition
6FC5 398-3CP10-0BA0
; 80% acceleration for the X axis
; Disable override for the X axis
; Feedforward control ON
; Feedforward control OFF
; Feedforward control ON
; Feedforward cotnrol OFF
Programming
8.3 Axis movements
8-167