A METHOD AND APPARATUS FOR DECELERATING AND STOPPING A SEWING MACHINE MOTOR

A METHOD AND APPARATUS FOR DECELERATING AND STOPPING A SEWING MACHINE MOTOR

A method and apparatus for automatically positioning a reciprocating needle while rotating the motor a minimum number of degrees. Apparatus is provided for sensing the motor angle and comparing it with a preset braking angle. After the braking angle has been reached, the motor is decelerated until i...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: ISETT, DON DALE, MARTELL, CHARLES RONALD, ABNEY, PAUL AUSTIN
Format: Patent
Sprache:eng
Schlagworte:
EMBROIDERING
SEWING
TEXTILES
TUFTING
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Beschreibung
Zusammenfassung:A method and apparatus for automatically positioning a reciprocating needle while rotating the motor a minimum number of degrees. Apparatus is provided for sensing the motor angle and comparing it with a preset braking angle. After the braking angle has been reached, the motor is decelerated until it reaches a needle positioning speed, whereupon the motor angle is again sensed and compared to the needle positioning angle. The motor rotates until the needle positioning angle has been reached, whereupon the brake is reapplied to stop the motor at the desired needle position in a minimum time duration without performing an additional stitch.