Image forming apparatus and method of controlling image forming apparatus

An image forming apparatus includes a cassette that has a placement plate on which a sheet is set, a paper feed roller, a raising/lowering mechanism that raises and lowers the placement plate, a print unit, a sheet sensor, an upper limit sensor and a control unit. The control unit recognizes, based...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Minamino, Koji, Asaka, Hitoshi
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:An image forming apparatus includes a cassette that has a placement plate on which a sheet is set, a paper feed roller, a raising/lowering mechanism that raises and lowers the placement plate, a print unit, a sheet sensor, an upper limit sensor and a control unit. The control unit recognizes, based on an output of the sheet sensor, that the sheet supplied from a paper feed device reaches an installation position of the sheet sensor. The control unit detects, based on an output of the upper limit sensor, that the paper feed roller reaches a predetermined upper limit position or that the raising/lowering mechanism raises the placement plate such that the sheet reaches a feed position and uses the sheet sensor and the upper limit sensor so as to detect that the paper feed device encounters overload.