Nexen RSD200 964531 - Manual (Page 16)

FORM NO. L-21161-E-0108 1
For most applications the basic Tuning Parameters will
be sufficient to tune the RSD200.
The Advanced Tuning Parameters are for applications
with unique requirements such as:
• extremely fast accelerations/decelerations
• zero web tension during stops
• frequent starts and stops
System Integrators appreciate these parameters as they
provide the flexibility to customize the control system
similar to that of hardware based control boards.
Select ShOW ADVANCeD from the Tuning window.
NOTe: The following parameters have all been set to
a factory default.
D
aMPening
DAMPENING effects how responsive the controller
is. Once GAIN has been set, DAMPENING can be
adjusted to make the control more sluggish (larger
number) or more responsive (smaller number). The
default setting will work for most applications, but if the
dancer arm experiences high frequency movement due to
out-of-round rolls or vibrations, increase DAMPENING.
M
iniMuM
a
DaPtatiOn
MINIMUM ADAPTATION is the beginning point for
ADAPTATION after an adaptation reset caused whenever
the dancer arm is at the maximum storage position while
the RSD200 is stopped. If dancer arm oscillations persist
when starting near core, then reduce the MINIMUM
ADAPTATION in increments of 0.5 and test again.
M
axiMuM
a
DaPtatiOn
MAXIMUM ADAPTATION is the maximum limit of the
Adaptation Term. This parameter is useful to limit how
high the RSD200 ADAPTATION value can go. If the
ADAPTATION value rises too high and causes dancer
arm oscillations, lower the value to prevent oscillations.
a
DaPtatiOn
R
ate
ADAPTATION RATE effects how fast the controller
adapts to a roll’s diameter and inertia. If you set the
parameter too low, the control will be slow to adapt.
This can cause the dancer arm to slowly oscillate about
the SETPOINT during start-up. If set it too high, at core
the RSD200 will adapt very rapidly, causing the gain to
become too large and the dancer arm to oscillate quickly.
. ADVANCeD TUNINg PARAmeTeRS
Figure 1
The RSD200 will maintain the dancer arm position at the dancer SETPOINT value when the machine is running. The
RSD200 will still be active when the machine is stopped. For most applications, the Dancer SETPOINT is set to 50%.
However, the Dancer SETPOINT can vary from 50% to provide more or less web storage depending on the machine’s
acceleration and deceleration requirements.
DANCER SETPOINT values range from 0% minimum storage position to 100% maximum storage position and can be
found in the DANCER SETPOINT pane of the TUNING window.
.2 DANCeR SeTPOINT