Warp tension control apparatus with tension reduction during loom stop
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United States of America Patent
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-
Dec 15, 1992
Grant Date -
N/A
app pub date -
May 9, 1991
filing date -
May 11, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A warp tension control apparatus includes a tension detector for detecting the tension of a warp and an operation mode controller for generating a control signal to drive a motor so as to minimize the deviation between the detected tension and a normal target tension. A long period stop mode controller is included for controlling the tension so that a target slack tension is set to be less than the normal target tension when a loom stop signal has been issued. A selector switch is provided for selectively switching to a contact connected to an output of the long period stop mode controller before entering a long unmanned operating period of the loom, the switch being disposed in a circuit between an input terminal of the long period stop mode controller which receives a loom stop signal and a warp tension slack device. A switch is provided for stopping the output of the operation mode controller when the long period stop mode controller outputs the slack tension control signal such that the warp tension when the loom is stopped is said to be less than that at the time of normal operation only when the selector switch is selectively switched to a contact connected to the output of the long period stop mode controller.
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