Method of and apparatus for controlling the yarn spinning-in in

Details Method of and apparatus for controlling the yarn spinning-in in Method of and apparatus for controlling the yarn spinning-in in

1987-05-12

1989-04-18

Levy, Stuart S.

Textiles: spinning, twisting, and twining

Apparatus and processes

Piecing up

57302, D01H 7885, D01H 1502

Patent

active

048215023

ABSTRACT:
A process of automatic yarn spinning-in in the spinning unit of an open-end rotor spinning machine of an automatic service device provided with a control unit having a programmable microprocessor control system for controlling the spinning-in cycle and the automatic adjustment of spinning-in parameters modified according to successive verifying tests which are performed by the automatic service device which is either arranged in the individual spinning units, or as a unit traveling along the machine. By successive tests, spinning-in parameters are adjusted for an interval for yarn return to the spinning rotor as well as for determining the start of fiber feeding. The spinning-in parameters can be corrected by further verifying tests in spinning units with various dynamic characteristics.

REFERENCES:
patent: 4033107 (1977-07-01), Sasayama et al.
patent: 4178749 (1979-12-01), Stahlecker et al.
patent: 4489544 (1984-12-01), Morita et al.
patent: 4628684 (1986-12-01), Morita et al.

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