Winding diameter calculation setting
172
WINDING DIAMETER COMPENSATION FUNCTION
Initial winding diameter calculation at a start (enabled under Vector
control only)
• Calculate the initial winding diameter "D" from the dancer travel distance "L" when the dancer roll moves from the lower limit
position to the neutral position at a start.
• When
Pr.1255 Accumulated amount
= "8888" and the dancer roll position is equal to or lower than the setting of
Pr.1252
Dancer lower limit position
, dancer roll is lifted with PI gain at a start, but initial winding diameter calculation is not
performed. This operation is useful to wind up sagging material slowly.
• When
Pr.1255
= "9999", winding diameter calculation is not performed, and the winding diameter, which has been used, is
kept. In such a case like this, PI gain of speed control for normal operation is used instead of gain for winding diameter
calculation.
NOTE
• Do not use
Pr.78 Reverse rotation prevention selection
when using initial winding diameter calculator function.
• To adjust the overshoot amount at an initial winding diameter calculation, use
Pr.73 Analog input selection
to set the
polarity reversible operation.
• To minimize fluctuation of the dancer roll when shifting from initial winding diameter calculation to normal operation, set
Pr.13
Starting frequency
= "0".
Dancer lower limit position and accumulated amount setting (Pr.1252,
Pr.1255)
• Set
Pr.1252 Dancer lower limit position
and
Pr.1255 Accumulated amount
. The winding diameter at a start is
calculated from the dancer roll travel distance (accumulated amount) and the corresponding number of pulses (number of
rotations).
D =
2
L
L : Dancer travel distance (accumulated amount = 2
L)
π
N
Z
N : Number of motor rotations
Z : Gear ratio
Pr.1255 setting
When the dancer roll position is equal to or
lower than the Pr.1252 setting
When the dancer roll position is higher than
the Pr.1252 setting
1 to 5000 mm
• Initial winding diameter calculation is performed.
• The winding diameter obtained from the initial
winding diameter calculation is used.
• The dancer roll is lifted with PI gain (
Pr.1256 to
Pr.1259
) at a start.
• Initial winding diameter calculation and dancer lifting
operation are not performed.
• The winding diameter, which has been used, is kept.
8888
• Initial winding diameter calculation is not performed.
• The winding diameter is kept.
• The dancer roll is lifted with PI gain (
Pr.1256 to
Pr.1259
) at a start.
• Initial winding diameter calculation and dancer lifting
operation are not performed.
• The winding diameter, which has been used, is kept.
9999
• Initial winding diameter calculation and dancer lifting
operation are not performed.
• The winding diameter, which has been used, is kept.
• Initial winding diameter calculation and dancer lifting
operation are not performed.
• The winding diameter, which has been used, is kept.
L
Target position
Lower limit position
Pr.1255
=2
×
L
Summary of Contents for A800 Plus Series
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