Nexen RSD200 964531 - Manual (Page 15)

1 FORM NO. L-21161-E-0108
Most applications only require adjustment of GAIN and
NEW ROLL ADAPTATION to tune the RSD200. For
extreme applications, the RSD200 offers advanced
tuning parameters (See section 4.2).
Figure 1
.0 TUNINg
.1 bASIC TUNINg PARAmeTeRS
NEW ROLL ADAPTATION is the beginning adaptation
value that the RSD200 will adapt from after receiving
a Splice signal. The closer this value is to the actual
Adaptation value the shorter the time required for the
RSD200 to adjust itself to actual roll conditions; so NEW
ROLL ADAPTATION needs to be set for a new roll.
NOTe: If a machine is started with a new roll smaller
than the roll used to set NeW ROLL ADAPTATION, the
controller gain could be too high, causing the dancer
arm to become unstable.
Unwind Applications: Unwind applications begin with
new rolls and run them down to their core diameter.
Some unwind applications start with the same diameter
roll every time; others start with rolls of various diameters.
NEW ROLL ADAPTATION should be set to the
ADAPTATION value shown in the CONTROL pane of
the DIAGNOSTICS Window when running the smallest
diameter new roll under minimum tension conditions (See
Figure 18).
g
ain
Note: gain must be adjusted first, because it affects
all other tuning parameters and controls how the
dancer arm responds to errors.
1. Operate the machine at a slow run speed with a
nearly full roll.
2. When the machine is at a constant speed, allow
about five seconds for the RSD200 to adapt (black
line on the diagnostics trend levels off), then perform
the following test:
n
ew
R
Oll
a
DaPtatiOn
1. Load the smallest diameter roll you would begin with
(or splice in) on the machine and set the web tension
to minimum.
2. Operate the machine at a slow run speed.
3. Allow 10 seconds for RSD200 to adapt after ma-
chine has reached run speed.
4. Read the ADAPTATION value shown in the CON-
TROL pane of the DIAGNOSTICS Window and
enter this number for the NEW ROLL ADAPTATION
on the TUNING window.
5. Press SEND on the TUNING window.
Winding Applications: Winding applications begin
at core or with small diameter rolls and create larger
diameter rolls.
In winding applications NEW ROLL ADAPTATION is
typically set the same as MINIMUM ADAPTATION.
If partial rolls are loaded on the winder shaft, NEW
ROLL ADAPTATION can be increased to provide an
ADAPTATION value closer to what a minimum sized
partial roll would require.
a) Change the dancer arm SETPOINT by 10%;
press SEND. The dancer arm should move to
the new SETPOINT in about two seconds with
little or no overshoot.
b) If the arm takes more than two seconds to reach
the new SETPOINT, increase Gain slightly and
repeat the test.
c) If dancer arm becomes unstable after a SET-
POINT change, decrease Gain and test again.
Select the Tuning icon from the toolbar.
NOTe: To view diagnostics, select the Diagnostics
icon from the toolbar; then select Start in the Com-
munications Pane (See Diagnostics Section).