Method and apparatus for detecting abnormal movement of piece go

Details Method and apparatus for detecting abnormal movement of piece go Method and apparatus for detecting abnormal movement of piece go

1992-08-21

1993-08-31

Coe, Philip R.

Bleaching and dyeing; fluid treatment and chemical modification

Fluid treatment

Special forms and forming

68178, D06B 328, D06B 2300

Patent

active

052397190

ABSTRACT:
A method and apparatus operable on a jet dyeing or finishing machine having a treatment chamber, a lifter reel, and a jet nozzle for movement of a fabric rope through the chamber for wet treatment thereof. Such an apparatus includes a direct current motor for driving the lifter reel, a mechanism for periodically deactivating the lifter reel drive, a sensing component for sensing the electromotive force (EMF) generated by the direct current lifter reel motor during periods of deactivation, and appropriate circuitry for comparing the sensed EMF value with a predetermined threshold value and signaling an operator in the event that the sensed EMF value is below the predetermined threshold value. A low EMF value is interpreted as an indication that the fabric rope is stopped or moving slowly over the lifter reel, with the lifter reel drive motor correspondingly rotating at a relatively lower rotational velocity, and the assumption is made that the slow rate of travel of the fabric rope is caused by tangling or other disruptions.

REFERENCES:
patent: 3830084 (1974-08-01), Caputi
patent: 4015452 (1977-04-01), Kreitz
patent: 4107801 (1978-08-01), Tachibana
patent: 5014526 (1991-05-01), Hacker et al.

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