Rotation control device for sewing motor

Details Rotation control device for sewing motor Rotation control device for sewing motor

1992-06-10

1994-04-19

Ro, Bentsu

Electricity: motive power systems

Control by patterns or other predetermined schedule means

Motor running-speed control

112275, 318162, 318127, D05B 6918

Patent

active

053049012

ABSTRACT:
When a sewing machine is locked during stitching of a thick fabric, the rotational direction of a sewing motor is alternately reversed at a predetermined time interval. A needle operatively coupled to the sewing motor through a mechanical system is moved up and down, whereby the needle sticks into the same stitching point for a desired number of times.

REFERENCES:
patent: 4541349 (1985-09-01), Inoue
patent: 4765267 (1988-08-01), Nakamura
patent: 5018466 (1991-05-01), Hasegawa

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