Apparatus for controlling the tension of a wire fed to a winding machine
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United States of America Patent
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Aug 31, 1993
Grant Date -
N/A
app pub date -
Dec 20, 1990
filing date -
Dec 20, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus having a drive pulley around which the wire is rolled, driven by a motor coupled to a speed control element. The pulley is provided with a tachometer which generates a signal proportional to the speed of movement of the wire. An extensometer, coupled to the wire, generates a signal, representative of a predetermined, ideal tension in the wire, which is compared with a set value. The resulting signal is superimposed on the tachometer signal to generate a signal to control the control element. The apparatus may also be provided with a spring biased oscillating arm located after the extensometer that has a pulley on one end, over which the wire passes. Also, a coding wheel may be provided after the oscillating arm assembly which generates a signal proportional to the speed of the wire. The coding wheel signal is converted to a signal representative of a variation in tension of the wire. The preset ideal value is established by subtracting the converted signal from a second set value, corresponding to an ideal variation in the tension of the wire.
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