63
Details of the tension control
(2) Operation/setting procedure
The acceleration torque amount is added while the acceleration inertia compensation signal (X57) is ON. The deceleration
torque amount is subtracted while the deceleration inertia compensation signal (X58) is ON.
Use the X59 signal to choose acceleration and deceleration time setting parameters for the inertia compensation.
J
M
: [inertia moment of the motor + inertia moment of the empty bobbin]
4
(Pr. 713)
J
L
: Material moment of inertia
Pr.20
: Reference acceleration/deceleration speed (r/min) (operation speed at minimum diameter)
t: Acceleration time or deceleration time
(Pr. 756, Pr. 757, Pr. 758, Pr. 759)
Z: Gear ratio
(Pr.773, Pr.774)
D, diameter obtained by the winding diameter calculation (m);
Pr. 715
, material specific gravity (g/cm
3
);
Pr. 714
, roll width (m);
Pr. 721
, roll diameter (m).
Inertia compensation cushion time
Inertia compensation cushion time is the time to reach the 100% torque command.
X57 signal
X58 signal
Inertia
compensation
OFF
OFF
Not performed
ON
OFF
Acceleration
OFF
ON
Deceleration
ON
ON
Not performed
X59 signal
Acceleration time for
inertia compensation
Deceleration time for
inertia compensation
OFF
Pr. 756
Pr. 757
ON
Pr. 758
Pr. 759
Pr. 20
Pr. 721
Ta = (J
M
+J
L
)
Present winding diameter
(N
m)
Z
2
9.55
t
Material J
L
=
1
Pr. 715
(g/cm
3
)
Pr. 714
(m)
D
4
(m) -
Pr. 721
4
(m)
32
Inertia compensation torque T (%) =
T
a
100(%)
Rated motor torqueT
M
Speed
X57 (acceleration)
X58 (deceleration)
Torque command
Inertia compensation (acceleration)
Inertia compensation (deceleration)
ON
ON
Torque command value
Inertia compensation
cushion time
Pr. 716
Torque command 100%
