Feed control apparatus for a sewing machine

Details Feed control apparatus for a sewing machine Feed control apparatus for a sewing machine

1987-08-07

1989-04-25

Falik, Andrew M.

Sewing

Stitch forming

Feeding work material

112314, 112456, D05B 302

Patent

active

048237159

ABSTRACT:
In order to correct the asynchronous state of a feed pulse motor of a sewing machine used to reciprocate a feed for feeding a fabric to a sewing needle, a feed control apparatus is provided which switches the pulse motor to a predetermined excited state when the feed dog abuts a stopper on the downstream side of feed motion at the start up of sewing operation so as to locate the feed dog at a known reference position. Additionally, the feed control apparatus switches the pulse motor to another predetermined excited state when the feed dog abuts a stopper on the upstream side of the feed motion so as to locate the feed dog at a known position during consecutive sewing operation.

REFERENCES:
patent: 4271773 (1981-06-01), Makabe et al.
patent: 4308814 (1982-06-01), Takenoya
patent: 4315472 (1982-02-01), Makabe et al.
patent: 4368683 (1983-01-01), Takenoya
patent: 4696247 (1987-09-01), Horie

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