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Hydraulics Gap Control
Side View Hydraulics Gap Control Position Transducer Hydraulic Cyl. Back up roll Work roll Gear box Motor Spindle Work roll Back up roll Load Cell
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Front View Servo Valve Position Transducer Hydraulic Cyl.
Ref.Position is to control thickness of strip by control gab between top and bottom work roll. Ref.Position Servo Valve Position Transducer Hydraulic Cyl. Feed back Position Position Transducer Hydraulics Cyl. Strip Load Cell
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HGC Roll force signal from load cell
1x Work Roll (1Hz) Frequency band Hz cause chatter mark on the work roll and sometime on strip, side band = 1x work roll The frequency band came from exciting of servo valve, in close loop control the valve relate with deviation of feed back and reference position HGC Servo signal from open %of servo valve (Drive Side) HGC Servo signal from open %of servo valve (Non Drive Side)
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