Sewing machine with step motor operated feed device

Details Sewing machine with step motor operated feed device Sewing machine with step motor operated feed device

1986-05-08

1987-02-17

Nerbun, Peter

Sewing

Stitch forming

Feeding work material

112306, 112317, D05B 2714, D05B 2706, D05B 3510

Patent

active

046431187

ABSTRACT:
In a sewing machine with a feed device which comprises a feed wheel arranged next to a stitch formation point, driven synchronously with stitch formation tools, and mounted in a support provided at the housing of the sewing machine, in order to obtain an extremely exact drive in both directions, the feed wheel is placed in driving connection with a step motor. In a manner known in itself, the step motor receives stepping pulses which can be generated by a pulse generator operating synchronously with a main shaft of the machine and via a counting device that determines the feed amount. This feed amount is presettable by selectable digital data contained in a memory. In an arrangement wherein the feed wheel is connected to its drive via a deflection gearing and a transmission shaft mounted in the support, the deflection gearing consists of a ring gear attached to the feed wheel and of a pinion firmly connected to the transmission shaft. An especially compact solution results by attachment of the step motor on the support and by rigid coupling of its output shaft to the transmission shaft.

REFERENCES:
patent: 4109595 (1978-08-01), Ducol et al.
patent: 4181085 (1980-01-01), Conner, Jr.
patent: 4295435 (1981-10-01), Uemura et al.
patent: 4318360 (1982-03-01), Uemura et al.
patent: 4462326 (1984-07-01), Perego et al.

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