B. Basic controlling principles
B−26
Festo P.BE−CPX−CMA X−CONTROL−EN en 0908NH
Cushioning factor Cushioning is a measure for the transition behaviour of the
system from the actual to the setpoint status, especially
when there are fast modifications to the setpoint value. As a
rule the system should guarantee low−vibration behaviour
with setpoint specifications and movement into the target
position without overswing.
By modifying the factor for
cushioning, you can influence the
transition behaviour of the system.
Behaviour of the axis
Factor
Bad positioning quality, setpoint position is ap
proached only slowly (underswing).
Reduce
The drive tends towards instability (tendency to vi
brate during positioning, up to continuous vibration
around the setpoint position, heavy overswing).
Increase
The positioning process is carried out quickly and
accurately.
Optimal
Signal filter factor Speed and acceleration are derived from the positioning
signal and filtered to improve the signal quality. If in practice
there is bad signal quality, e.g. due to electrical interference,
filtering of the signal can be influenced by the signal filter
factor.
If filtering is too strong it may destabilise control.
Behaviour of
the axis Factor
The drive tends towards instability (despite low gain
and good cushioning).
Reduce
Noise" or loud valve noises (observe gain; this may
be too high).
Increase
The positioning process is carried out quickly and
accurately, low valve noises.
Optimal
To Next Page
Loading...
Need help?
General
