Method and apparatus for controlling the yarn tension of yarn be

Details Method and apparatus for controlling the yarn tension of yarn be Method and apparatus for controlling the yarn tension of yarn be

1991-12-03

1993-02-09

Gilreath, Stanley N.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 18R, 242 355A, B65H 5938

Patent

active

051847868

ABSTRACT:
A method and apparatus for controlling the yarn tension of yarn being cross-wound onto a bobbin on a textile winding machine. The amount of yarn on a supply package from which yarn is unwound is determined optoelectronically, gravimetrically or by measuring the yarn tension. The winding speed of the bobbin is adjusted in response to the determined yarn amount of the supply package so as to maintain the yarn tension substantially constant during unwinding. The winding speed of the bobbin can be controlled to follow a predetermined winding speed program which corresponds to the determined mass of the supply bobbin. To determine the yarn amount gravimetrically, the supply package is weighed by a balance device as it is conveyed thereover by a conveyor. The movement of the balance in response to the mass of the supply package can be electronically transmitted to a control device which prepositions a cam having a profile corresponding to the predetermined winding speed program. The rotation of the bobbin is then electronically controlled in response to the movement of a cam follower which follows the cam.

REFERENCES:
patent: 4685630 (1987-08-01), Buhren et al.
patent: 4768728 (1988-09-01), Jenny et al.
patent: 4805846 (1989-02-01), Ueda et al.

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