Motor control apparatus for a sewing machine

Details Motor control apparatus for a sewing machine Motor control apparatus for a sewing machine

1987-06-30

1988-12-13

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

Program- or pattern-controlled systems

318369, 112275, 112221, G05B 1910

Patent

active

047913444

ABSTRACT:
A motor control apparatus for a sewing machine comprising a stop device for generating a stop signal instructing stoppage of an alternating current motor, a sensor for sensing a predetermined position of a needle and outputting a position signal thereof, and a stop control responsive to the stop device and the sensor means for controlling a rotating field of an alternating current motor to stop in response to the stop position of the needle when the stop signal and the position signal are received.

REFERENCES:
patent: 3906315 (1975-09-01), Gotisar
patent: 3910211 (1975-10-01), Kubokura
patent: 4137860 (1979-02-01), Yoneji et al.
patent: 4516514 (1985-05-01), Neki et al.
patent: 4517909 (1985-05-01), Neki et al.
patent: 4627370 (1986-12-01), Nakamura
patent: 4676180 (1987-06-01), Neki et al.
patent: 4714039 (1987-12-01), Shimada

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