Sewing machine control apparatus

Details Sewing machine control apparatus Sewing machine control apparatus

1986-11-04

1987-09-08

Nerbun, Peter

Sewing

Elements

Starting or stopping

318369, D05B 6924

Patent

active

046916539

ABSTRACT:
In a control device for a sewing machine control apparatus wherein an electric motor generates a reverse torque against a torque due to a load on the sewing machine in abeyance state, to hold a sewing needle in an upper or a lower position, the reverse torque reaches a maximum value by a known feedback system at its turn to a predetermined revolution angle. The control apparatus is devised such that, when it is further turned in excess of the predetermined revolution angle, the reverse torque falls to zero, hence the driving motor remains at the position turned to the predetermined revolution angle.

REFERENCES:
patent: 4516514 (1985-05-01), Neki et al.
patent: 4517909 (1985-05-01), Neki et al.

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