Method and control apparatus of detecting eccentricity in drum w

Details Method and control apparatus of detecting eccentricity in drum w Method and control apparatus of detecting eccentricity in drum w

1998-05-19

1999-10-26

Stinson, Frankie L.

Bleaching and dyeing; fluid treatment and chemical modification

Fluid treatment

Manipulation of liquid

68 1204, 68 1206, D06F 3730

Patent

active

059705558

ABSTRACT:
A device and method for controlling a washing machine detects an amount of eccentricity of a tub of the washing machine and determines whether the degree of eccentricity is acceptable. The degree of eccentricity is measured by causing the tub to rotate at a substantially constant speed, and counting the number of times that the rotational speed of the tub changes during a predetermined period of time. The device and method determine whether a degree of eccentricity is acceptable based a comparison of the determined degree of eccentricity to one or more of a plurality of predetermined eccentricity reference values, and based on a number of times that the determination has been made unsuccessfully. The eccentricity reference values are selected based on a compensated laundry volume level. The compensated laundry volume level, in turn, is based on a detected laundry volume level, and a laundry volume compensation index that represents the number of times that the determined eccentricity value of the tub exceeds a predetermined eccentricity value during a predetermined time period.

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patent: 5070565 (1991-12-01), Sood et al.
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