Method and apparatus for controlling a drafting unit
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United States of America Patent
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Aug 4, 1992
Issued Date -
N/A
app pub date -
Jan 9, 1992
filing date -
Aug 11, 1989
priority date (Note) -
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status (Latency Note)
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Abstract
A method and apparatus for controlling a drafting unit for textile slivers. The driving apparatus for the drafting unit is controlled by a main control and at least one auxiliary control. The drafting unit includes an upstream measuring element and a downstream measuring element which deliver measured signals to a central computer unit. A signal representing the inlet sliver cross-section is determined by means of an identification field parameter and by using the downstream measured signal. The identification field parameter is continuously adjusted during operation. A threshold switch is used to control the compensation for irregularities in the incoming sliver.
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