SCREEN DEFINITIONS
www.maxcessintl.com
CYGNUS
MI 850A316 1 B
Page 51 of 66
Screen Function
Definition
Out of round enable
Toggle to activate the out of round feature that will
compensate for eccentric rolls in an UNWIND
application. This feature requires an external RPM
sensor
Out of round gain ___
Enter a value for the PROPORTIONAL GAIN tuning
parameter to be used in the control loop while OUT OF
ROUND COMPENSATION is active
Out of round max RPM
Enter a value to limit the RPM sensor input in the event
that the out of round roll compensation activity
approaches the natural frequency of the system. This
situation is unlikely, but will become evident if the
braking action on the web begins to oscillate out of
control during the unwind. If this happens, check the
readout of the present roll RPM and set the OUT OF
ROUND MAX RPM at some value below this reading.
Output ___%
Display of the current output level from the CYGNUS at
TB1.1 and TB1.2, TB1.3, or TB1.4 depending upon
which output is utilized
Overall gain ___
Enter a value for the overall gain. This parameter is
similar to the PROP GAIN in definition, however, it is
always present and multiplied through the control signal
regardless of other settings. Factory default is "1" and it
is not normally recommended that you modify this
unless you are using the GAIN SCHEDULING feature.
In this case, the overall gain can be manipulated to
improve stability at mid-roll.
Percent Taper ___%
Enter a value to taper tension down as roll builds during
REWIND mode. This will help reduce the pressures that
build in rolls as consecutive layers are wound and can
reduce or eliminate the unwanted effects such as
crushed cores, starring and telescoping rolls.
Perform calibrate
Select to continue with tension sensor calibration. Follow
the on-screen prompts for the subsequent steps. See
also Section 6.3
PI
Toggle to utilize a control loop with PROPORTIONAL
GAIN and INTEGRATOR. Manual tuning only.
PID
Toggle to utilize a control loop with PROPORTIONAL
GAIN, INTEGRATOR, and DERIVATIVE. Manual tuning
only.
Precision calibration
Select to enter load cell precision calibration procedure.
This will require use of weights and a temporary web
that mimics the normal web path around the sensing roll.
This is recommended as the most accurate method of
load cell calibration. See also Section 6.3
Press here to calibrate diameter
Select 4 or 9 to match the ACTUAL READING ___ with
CALIBRATE SETPOINT ___
Press here to calibrate RPM
Select 4 or 9 to match the ACTUAL READING ___ RPM
with CALIBRATE SETPOINT ___RPM
Press here to calibrate velocity
Select 4 or 9 to match the ACTUAL READING ___ with
CALIBRATE SETPOINT ___
Summary of Contents for Cygnus MAGPOWR
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