gefran TPD32-EV-...-4B - Function of Calculation for Initial Diameter

—————— Instruction manual ——————
297
6.16.3.8 Function of calculation for Initial diameter
Thisfunctionperformsapreliminarycalculationofthediameterofanunwinder/winderbeforestartingtheline.
Thisallowsbettercontrolofthesystemavoidingunwantedbalancingofthedancer.
Thecalculationisbasedonthemeasureofthemovementofthedancerfromthepositionoflowerfullrangeto
itscentralpositionofwork,andonthemeasureofangularmovementoftherollduringtheinitialphase.
note: Thefunctionofinitialdiametercalculationcanbecarriedoutonlywhenthewinder/unwinder
arecontrolledthroughdancer(noloadcell)andthespeedfeed-backiscarriedoutthrough
encoder.
TheresultofthecalculationisassignedtotheparameterPI output PID,andsoitrepresentsthemultiplierfactor
ofthefeed-forward,inordertoobtaintheangularspeedreferenceofthemotor.
Itsvalueisuniverselyproportionaltotherolldiameter.
Diameter
calc st
Minimum diameter
Gear box ratio
Max deviation
Dancer
constant
Positioning spd
PI output PID
Diameter
calc
PID feed-back
after offset
Speed fbk sel
Encoder1position
Encoder2position
Diameter
calculation
I/O Parameter
Parameter
Internal variable
LEGEND:
Figure 6.16.3.6: Diameter calculation block description
Diameter calc
[794] Diametercalc
[795] Positioningspd[rpm]
[796] Maxdeviation
[797] Gearboxratio
[798] Dancerconstant[mm]
[799]
Minimumdiameter[cm]
Parameter description No.
Value
Standard
Conguration
min max
Factory
American
Factory
Standard
Diameter calc
Enabled(1)
Disabled(0)
794 0 1 0 0
Positioning spd [rpm]
795 -100 +100 0 0
Max deviation
796 0 +10000 8000 8000
Gear box ratio
797 0.001 1.000 1.000 1.000
Dancer constant [mm]
798 1 10000 1 1
Minimum diameter [cm]
799 1 2000 1 1
*Thisfunctioncanbesetonadigitalprogrammableinput.