Sewing machine with a step motor for feed control

Details Sewing machine with a step motor for feed control Sewing machine with a step motor for feed control

1984-05-30

1986-12-02

Nerbun, Peter

Sewing

Stitch forming

Zigzag

318685, 318696, D05B 302

Patent

active

046256679

ABSTRACT:
In a sewing machine with a microcomputer controlled step motor for the control of the magnitude and direction of the feeding action of a cloth feeder, the microcomputer is connected, via a buffer and a D/A converter, to the non-inverting input of a comparator which controls the turn-on and turn-off as well as the current intensity of each phase winding of the step motor and whose inverting input is connected to a discriminating element disposed in the phase circuit, for the step setting correction and for the torque intensification of the step motor. To adapt the correction possibilities to the step motor parameters, the D/A converter has four input stages whose biggest stage is connected to the corresponding output stage of the buffer via a voltage divider.

REFERENCES:
patent: 4191120 (1980-03-01), Bergvall
patent: 4271773 (1981-06-01), Makabe et al.
patent: 4404509 (1983-09-01), Hartwig
patent: 4413577 (1983-11-01), Minalga et al.

Affiliated with

Also associated with

Rating

Sewing machine with a step motor for feed control does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sewing machine with a step motor for feed control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sewing machine with a step motor for feed control will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2287232