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Details of the tension control
4.6 Details of the tension control
4.6.1
Winding diameter calculation during tension control (Pr. 797, X91 signal, Y51
signal)
The winding diameter calculation is also enabled during torque-controlled winding operation. The obtained winding diameter
will be used for the tension control, inertia compensation, and taper ratio setting.
Turn ON the dancer/tension control selection signal (X83) to perform winding diameter calculation.
(1) Control block diagram
(2) Winding diameter hold in the low frequency range of the motor operation
(Pr. 797)
The winding diameter calculation can be paused while the motor operation frequency is low. While pausing, the last winding
diameter calculation result is held.
Winding diameter calculation starts when the line speed exceeds [
Pr. 797
(minimum diameter setting)].
For
Pr. 797
, set a motor's operation frequency where the winding diameter calculation starts in a winding operation started with
a bare roll.
POINT
To use the tension control, set
Pr. 800
= "6 (vector control)" or "16 (Real sensorless vector control)".
Turn ON the X83 signal to activate the tension control.
Tension control is unavailable while the X83 signal is OFF.
To assign the X83 signal, set "83" in any of
Pr. 178 to Pr. 189 (input terminal function selection)
.
Parameter
Number
Name
Setting Range
Setting
Increments
Initial
Value
Remarks
797
Calculated winding diameter
start speed
0 to 400Hz
0.01Hz
3Hz
Motor speed
Main speed command
Torque command
Winding
diameter
calculation
Tension control
Taper setting
Inertia
compensation
Mechanical
loss
compensation
Monitor 63: tension setting
Monitor 65: inertia compensation
Monitor 64: mechanical loss compensation
IM
X83 ON
X83 ON
X83 OFF
Pr. 800
= 6
、
16
Line speed
Line speed
Winding diameter
Winding diameter calculation
Winding diameter
hold
Winding diameter calculation
Winding diameter
hold
Winding diameter calculation
Pr. 797
(winding diameter calculation
start speed) line speed at minimum
winding diameter