Sewing machine with step motor operated oscillation drive

Details Sewing machine with step motor operated oscillation drive Sewing machine with step motor operated oscillation drive

1986-05-08

1987-06-09

Nerbun, Peter

Sewing

Stitch forming

Feeding work material

112318, 112453, D05B 2720, D05B 2710

Patent

active

046711970

ABSTRACT:
A sewing machine with a needle bar mounted in a rocker, has a step motor drive for the oscillation of the rocker. A memory is used in which are contained selected digital data for influencing the step motor and a control unit is inserted between the memory and the step motor for selection and conversion of the digital data into stepping pulses for the step motor. A pulse generator operating synchronously with a main shaft of the sewing machine is used for triggering the transmission of stepping pulses to the step motor. To improve the drive transmission and to avoid reactions on the step motor, the step motor is connected to a lever arm of the rocker via an eccentric transmission.

REFERENCES:
patent: 3970018 (1976-07-01), Hager
patent: 4295435 (1981-10-01), Uemura et al.
patent: 4495877 (1985-01-01), Willenbacher
patent: 4583476 (1986-04-01), Fischer

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