Chapter 7 Appendix • 336 ARTDrive V2 series - Instruction Manual
The gains of the different components have to be set, experimentally, with a
loaded machine; such tests can be started with the values stated below:
Set PI P1 gain % = 2%
Set PI I1 gain % = 2%
Set PD P1 gain % = 1%
Use the derivative component as a system “damping” element, by setting for
example:
PD D1 gain % = 1%
PD der filter = 20ms
In case a series of cascade references has to be performed for another
possible Drive, set PID out mon on an analog output, for example:
An out 1 src = PID out mon
7.5.4 Parameters Referring to the Function for the Calculation of the Starting
Diameter
This function is always necessary when an unwinder has to be controlled or
when the starting diameter is unknown.
Set Positioning spd with the rpm value required to perform the dancer
starting positioning.
For example:
Positioning spd = 15rpm
The polarity of the reference assigned to Positioning spd is equal (both with
a winder or unwinder) to the one functioning as a winder. If for example an
unwinder has to be controlled and the functioning speed reference is
positive, set Positioning spd with a negative value.
Set Max deviation with a value slightly lower than the one corresponding to
the position of the maximum mechanical sealing allowed by the dancer.
During the commissioning it is always necessary to perform the self-tuning of
the drive analog inputs; in particular by self-tuning the analog input 1 with a
dancer in a lower limit switch position, this position is automatically set with a
100% value.
Therefore, in order to grant a precise calculation, the value to be set is:
Max deviation = 90 %
Set Gear box ratio equal to the reduction ratio between the motor and the
winder:
Gear box ratio = 0.5
Set Dancer constant with a value in mm corresponding to the total
accumulation of the material in the Dancer:
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