Winding diameter calculation setting
WINDING DIAMETER COMPENSATION FUNCTION
173
8
Initial winding diameter calculation deadband setting (Pr.1253, Pr.1254)
• When performing initial winding diameter calculation, winding diameter calculation deadband can be set for the target
position and the lower limit position of the dancer roll.
• Setting a deadband suppresses hunting of dancer control at a start, and reduces the influence of overshooting on the target
position.
• Use
Pr.1253 Initial winding diameter calculation deadband
or
Pr.1254 Initial winding diameter calculation deadband
2
to set the ratio of the deadband, assuming that the distance between the target position and the lower limit position is
100%.
Speed control gain during initial winding diameter calculation at a start
(Pr.1256, Pr.1257)
• When performing initial winding diameter calculation, inverter's speed control proportional gain and integral time during
winding diameter calculation can be set separately. After initial winding diameter calculation is completed, normal speed
control gain is applied.
Deadband
Calculation formula
Description
Initial winding diameter
deadband
| Target position - Lower limit position |
×
Pr.1253
/100
Deadband on the lower limit position
Initial winding diameter
deadband 2
| Target position - Lower limit position |
×
Pr.1254
/100
Deadband on the target position
Target position
Lower limit position
L
Deadband 2
Initial winding
diameter
calculation
is performed.
Deadband 1
Target position
Lower limit position
L
Deadband 1
Initial winding
diameter
calculation
is performed.
Deadband 2
Target position < Lower limit position
Target position Lower limit position
Dancer roll position
Deadband 1
ON
ON
Deadband 2
Dancer roll target position
Start command
Speed control proportional gain
Y232
Pr.820
Pr.1256
Pr.1257
Pr.821
Initial winding diameter calculation
Normal dancer control
Initial winding
diameter calculation
is performed.
Speed control integral time
When the deadband is smaller, fluctuation of the
dancer roll becomes less at operation shift from
initial winding diameter calculation to dancer control.
Содержание A800 Plus Series
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