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Code wheel manufacturing method, code wheel, rotary encoder, rotation control unit, belt carrier unit, and image forming apparatus | Kodierrad-Herstellungsverfahren, Kodierrad, Drehcodierer, Drehsteuereinheit, Riementrägereinheit und Bildgebungsvorrichtung | Procédé de fabrication de roue codeuse, roue codeuse, encodeur rotatif, unité de commande de la rotation, unité de support de courroie et appareil de formation d'images

Patentnummer:EP2108926B1
IPC Hauptklasse:G01D0005347
Anmelder:
Erfinder:
Anmeldung:24.03.09
Offenlegung:10.04.08
Patenterteilung:20.09.17

Abstract / Hauptanspruch
A manufacturing method for a code wheel (50) for a rotary encoder is provided. The code wheel (50) includes, in a central portion, a hole (203) into which a rotary shaft of a rotary member (47) is fitted and a code portion (201) including a radial code pattern in a circumferential edge portion (203a). The manufacturing method is configured to include the steps of forming the code portion (201) and a reference circle (210) in a plate so that the reference circle (210) has a radius larger than a radius of the hole (203) by a tolerance of deviation between a center position of the code portion (201) and a center position of the hole (203) and has a same center as that of the code portion (201); and forming the hole (203) in the plate in which the code portion (201) and the reference circle (210) are formed, so as to be contained in the reference circle (210).

EP2108926B1


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