Index
MENUMENU
MENUMENU
MENU [Unit] Access Default Min/Max Format Reg.Mode Level Ipa
Parameter Name
Description
Chapter 6 Parameter • 302 ARTDrive V2 series - Instruction Manual
APPL CFG / Diameter Calculation
This Function allows to perform a preliminary calculation of a coil diameter before starting
the line. It allows to avoid undesired mechanical sealings of the dancer.
The calculation is based on the moving of the dancer from the lower limit switch position
to a central position as compared to the winder angular moving during the initial phase.
The function is only available with a dancer reaction.
The calculation result initializes the PI block output.
Dancer constant = (
D
xx2) 2L
M
Gear box ratio
Dancer constant = (
D
Lx x2) 4
Dancer
Winder/Unwinder
D
L
electrical 0
Central position
of working
Dancer
Upper limit
switch = +1000 count
Lower limit
switch = -1000 count
D
L
electrical 0
Central position
of working
Upper limit
switch = +1000 count
Lower limit
switch = -1000 count
Two pitches dancerOne pitch dancer
Figure O06: Diameter Calculation
Dancer Constant Measurement
With the dancer placed in a lower limit switch position, perform the self-tuning of the
analog input connected to O02.00 - PID fbk src.
Set the drive keypad on the O02.20 - PID fbk mon parameter. Measure and multiply by 2
the distance in mm between the lower mechanical limit switch and the dancer position,
where the O02.20 - PID fbk mon parameter has a 0 value (electric 0 position).
Multiply the calculated value by 2 if the dancer is made of a single pitch, by 4 if it is made
of two pitches etc. etc. as per the above figure.
Calculation of the Starting Diameter
Such calculation is based on the measurement of the dancer moving from its lower limit
switch position to its central working position, and on the measurement of the winder
angular moving during the initial phase.
For this reason during such period the dragging at the unwinder end or at the winder
beginning must be in a position to keep the material blocked.
To this purpose it is necessary to enable the dragging drive regulation with a speed
reference = 0.
If also the line nip rolls are controlled by dancers or loading cells, it is necessary to carry
out first the diameter calculation with the following winder and unwinder initial phase and
afterwards the dragging initial phase.
The O03.47 - PID MlpPI selmon parameter must always be equal to 0 in order to avoid
that O03.44 - PID PI out is set with a predefined value.
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