Mitsubishi Electric A800 Plus Series Function Manual page 132

Formula for calculating the torque for inertia compensation
Minimum winding
diameter (D )
2
Roll width (L)
Present winding diameter (D
Inertia compensation
=
torque T (%)
Rated motor torque T
2
Ta = [{J + (J + J ) × Z } × {Pr.393 / (π × D
M L B
1
1 4 2 4
π ρ
L (D - D )
J =
L
32
Symbol Description
Motor inertia value
J
M
2
J (kg·m )
Material inertia value
J
L
2
J (kg·m )
Empty reel inertia value
J
B
2
J (kg·m )
Z Gear ratio
Line speed command acceleration/deceleration
Pr.393
reference
Acceleration time for inertia compensation or
t
deceleration time for inertia compensation (s)
D Minimum winding diameter (m)
2
ρ
Material specific gravity (Kg/m
L Roll width (m)
D Present winding diameter (m)
1
Empty reel inertia (JB)
Reduction gear
(gear ratio: Z)
Motor inertia (J
)
1
Material inertia (J
Ta
100 (%)
M
) / Z}] / (9.55 × t)
1
3
)
TENSION SENSORLESS TORQUE CONTROL
Tension sensorless torque control details
)
M
)
L
Refer to page 132.
—
Refer to page 132.
Pr.1243/Pr.1244
Pr.393
The parameter setting unit is as set in Pr.358.
Pr.1414, Pr.1415, Pr.271, Pr.272
Pr.1236, Pr.1238, Pr.1240, Pr.1242
The parameter setting unit is mm.
Pr.1413
The parameter setting unit is g/cm
Pr.1412
The parameter setting unit is mm.
—
Remarks
3
.
5
131