LS Industrial Systems SV-iV5 Series - Draw, Droop, and Torque Control

6. Function Description
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6.5.6 Draw control
Draw control is a sort of Open Loop tension control. Draw is the ratio of speed difference between one roll and the
other. Tension is generated as in the following equation.
V2
V2-V1
D =
Where,
V1, V2: Transfer speed of each roll (m/min)
T: Tension (kg)
E: Elasticity coefficient of processed material (kg/mm2)
S: Sectional area of processed material (mm2)
2
21
V
VV
SEDSET
−
××=××=
Line Speed Setting
IM
INVERTER 2
IM
INVERTER 1
V2
Draw Setting
V1