Method of initially setting a stepping motor in a sewing machine

Details Method of initially setting a stepping motor in a sewing machine Method of initially setting a stepping motor in a sewing machine

1985-07-31

1987-07-07

Nerbun, Peter

Sewing

Elements

Frames

112445, 112453, 112275, D05B 302

Patent

active

046779256

ABSTRACT:
A stepping motor is initially set while it passes through a full moving range at comparatively low pulse frequency, and it is discriminated whether the motor moves accurately in response to driving pulses between detecting points until the motor passes one detecting point and again reaches this detecting point.

REFERENCES:
patent: 4480561 (1984-11-01), Makabe et al.
patent: 4498078 (1985-02-01), Yoshimura et al.
patent: 4519328 (1985-05-01), Takenoya et al.

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