Title:
LOOPER CONTROLLER
Document Type and Number:
Japanese Patent JPH01192418
Kind Code:
A
Abstract:
PURPOSE:To reduce variation of tension at the starting time of a looper and variation of tension due to ELETIE (electric tie) control at the time of adjustable speed by providing a frictional torque compensating device and an ELETIE control gain adjusting device in a loop storage facility of a continuous processing line. CONSTITUTION:At the starting time of the looper, a compensating quantity for frictional torque is outputted from the frictional torque compensating device 12 to a minor electric current control amplifiers 19, 20 through amplifiers 17, 18 for electric motors 21, 22. A positional deviation to the looper driven by the reference electric motor 21 is amplified by a position amplifier 27 through position signals due to position detectors 25, 26, and, at the shutdown time of the looper, the gain for shutdown/adjustable speed is changed over through a shutdown gain 29 for the shutdown and an adjustable speed gain 30 for the adjustable speed time and the compensating quantity for frictional torque is outputted from a close contact 28 to a high speed amplifier 16. Variation of tension at the starting time of the looper and variation of tension shown when speed is changed under ELETIE control can be reduced effectively.
Inventors:
MURAKAMI KATSUTAKA
Application Number:
JP1440388A
Publication Date:
August 02, 1989
Filing Date:
January 27, 1988
Export Citation:
Assignee:
HITACHI LTD
International Classes:
B21C49/00; (IPC1-7): B21C49/00
Attorney, Agent or Firm:
Katsuo Ogawa (2 outside)
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