Method for rotating a printer paper-feed roller

A method for rotating a printer paper-feed roller wherein the roller is driven by a DC (direct current) motor. A feedback-control signal is applied to the motor until the roller reaches a desired rotational position. The feedback-control signal is a function of an error signal, and the error signal...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	STOUT BARRY BAXTER, WRITT JOHN THOMAS
Format:	Patent
Sprache:	eng
Schlagworte:	CINEMATOGRAPHY CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER CORRECTION OF TYPOGRAPHICAL ERRORS ELECTRICITY ELECTROGRAPHY ELECTROPHOTOGRAPHY GENERATION HOLOGRAPHY i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES MAGNETOGRAPHY PERFORMING OPERATIONS PHOTOGRAPHY PHYSICS PRINTING SELECTIVE PRINTING MECHANISMS STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	A method for rotating a printer paper-feed roller wherein the roller is driven by a DC (direct current) motor. A feedback-control signal is applied to the motor until the roller reaches a desired rotational position. The feedback-control signal is a function of an error signal, and the error signal represents the difference between the actual rotational position and the desired rotational position of the roller. When the roller reaches the desired rotational position, the applied feedback-control signal is removed from the motor, and a direct-control biasing signal is applied to the motor to reduce or prevent rollback of the roller when the feedback-control signal is removed from the motor. In one example, the signals are PWM (pulse-width-modulated) signals.