PRINTER MEDIA LOW SENSING USING MOTOR CURRENT DRAWN WHEN FEEDING

Printer circuits (300) and components for detecting a media low condition on a printer (100) are provided. The printer circuit (300) comprises a motor (304) coupled to a platen roller (108), a current sense resistor (306) coupled in series with the motor, a current measuring circuit (310) comprising...

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Bibliographische Detailangaben
Hauptverfasser:	LEE, Phek Thong, NG, Cheng Khoon, CHING, Sze Ping
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CORRECTION OF TYPOGRAPHICAL ERRORS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES PERFORMING OPERATIONS PICTORIAL COMMUNICATION, e.g. TELEVISION PRINTING SELECTIVE PRINTING MECHANISMS STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	Printer circuits (300) and components for detecting a media low condition on a printer (100) are provided. The printer circuit (300) comprises a motor (304) coupled to a platen roller (108), a current sense resistor (306) coupled in series with the motor, a current measuring circuit (310) comprising an operational amplifier circuit configured to receive input voltage and output voltage of the current sense resistor (306), generate a differential voltage based at least in part on the input voltage and the output voltage, and convert the differential voltage to a current, and an analog-to-digital converter and control mechanism (312) configured to receive the current from the current measuring circuit (310) and control operation of the motor (304) based at least in part on the current.