Secondary Conditions - Siemens SINUMERIK 840D sl Function Manual

K3: Compensations
5.5 Dynamic feedforward control (following error compensation)
5. Execute FFWON during the axis motion.
6. The K
jump.
7. A higher K
following standstill. However, the feedforward control is active only from the stoppage
condition.
Essentially the same as when activating the feedforward control, for deactivation, the following
applies:
1. Traverse axis in the part program using the POSA operation.
2. Execute FFWOF during the axis motion.
3. The K
jump.
4. A lower K
following standstill. However, the feedforward control is inactive only from the stoppage
condition.
Example
In the following program example, axis A is traversed asynchronously to the path. An attempt
is made to activate the feedforward control in the channel while traversing. Contrary to the
geometry axes X, Y and Z, the feedforward control is not immediately effective for axis A. Here
one waits for the stoppage after N60. Axis A then traverses with the feedforward control in
N70.
Program code
N10 FFWOF
N20 POSA[A]=1000 FA[A]=10000
N30 G4 F1
N40 FFWON
N50 G0 X10 Y10 Z10
N60 WAITP(A)
N70 POSA[A]=1500 FA[A]=10000
N80 WAITP(A)
M30
5.5.6

Secondary conditions

Axes that are interpolating axes with one another
Also for axes that interpolate with one another, the feedforward control parameter should be
optimally set for each axis, i.e. also several axes that are interpolating with one another can
have different feedforward control parameters.
320
factor and following error displayed in the service display "Axis/spindle" must not
V
factor and a lower following error are only obtained for traversing motion
V
factor and following error displayed in the service display "Axis/spindle" must not
V
factor and a higher following error are only obtained for traversing motion
V
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions