—————— Instruction manual ——————
309
Vl = line speed
Φ
min
= min. diameter of the core[m]
Φ
max
= max. diameter of the core[m]
R = gear reduction ratio motor-winder/unwinder
So:
ω
max
/
ω
min
=
Φ
max
/
Φ
min
from which
ω
min
= (
Φ
min
/
Φ
max
) x
ω
max
Considering that the parameters
PI top lim
and
PI bottom lim
can be seen as multiplier factors of min. and
max. of the feed-forward.
Multiplying the feed-forward by
PI top lim
= 1, gives the max. speed reference concerning the minimum diameter.
Multiplying the feed-forward by
PI bottom lim
= 0.14, gives the min. speed reference concerning the max.
diameter.
This application operates by using the proportional-integral regulation.
The gains of a single component will be experimentally set with a loaded machine. It is possible to begin the
tests with the values below:
Set
PI P gain PID
= 15%
Set
PI I gain PID
= 8%
Set
PD P gain PID
= 5%
In this case, use the derivative component for forcing the regulator output during velocity changes of the system.
Programming for example:
PD D gain PID
= 20%
PD D filter PID
= 20ms
In case it is necessaryto carry out a reference cascade for another drive, program
PID output
on an analog
output, for example:
Analog output 1 / Select output 1= PID output
(with
Real FF PID
= 10000 count,
Analog output 1
= 10V).
Parameters regarding the calculation function of the initial diameter
This function is always necessary when one has to control an unwinder or when the starting diameter is unknown.
Set
Positioning spd
at the value in rpm with which the initial positionning of the dancer has to be done. For
example:
Positioning spd
= 15rpm
The polarity of the reference assigned to
Positioning speed
will be anyway (winder/unwinder) equal to the one
functioning as a winder.
If for example one has to control an unwinder and the speed reference in standard functioning is positive, assign
to
Positioning spd
a negative value.
Set
Max deviation
at a value slightly lower than the one correspondent to the position of max. mechanical travel
allowed by the dancer.
During commissioning, it is always necessary to carry out the self calibration of the analog inputs of the drive.
In particular the one regarding analog input 1, with dancer in its position of lower fullrange, This position is
automatically assigned to the value 10000. So in order to guarantee a precise calculation it might be assigned:
Max deviation
= 8000 (Default value)
Содержание TPD32-EV-...-2B
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