Substrate compactness detection
AssigneeHewlett-Packard Development Company, L.P.
InventorsAntonio Gracia Verdugo, Aleix Fort Filgueira, Carles Flotats Villagrasa
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Abstract
It is disclosed a substrate compactness detection method for a printer wherein the printer comprises a roller to receive a substrate roll and a media advance mechanism to receive a substrate from the substrate roll, the method comprising: determining a substrate thickness; advancing the substrate for a length; measuring an angular displacement of the roller caused by the advancing of the substrate; determining the substrate roll radius by using the length and the angular displacement; and calculating a compactness parameter in view of the substrate roll radius and the substrate thickness.
Claims15
A substrate compactness detection method for a printer wherein the printer comprises a roller to receive a substrate roll and a media advance mechanism to receive a substrate from the substrate roll, the method comprising:
- determining a substrate thickness;
- advancing the substrate for a length;
- measuring an angular displacement of the roller caused by the advancing of the substrate;
- determining the substrate roll radius by using the length and the angular displacement;
- and
- calculating a compactness parameter in view of the substrate roll radius and the substrate thickness.
A substrate compactness detection method for a printer wherein the printer comprises a roller to receive a substrate roll and a media advance mechanism to receive a substrate from the substrate roll, the method comprising:
- advancing the substrate for a length;
- measuring an angular displacement of the roller;
- advancing the substrate for a second length;
- measuring a second angular displacement;
- and
- determining a substrate compactness parameter based on the length, the second length, the angular displacement and the second angular displacement.
A printing system that comprises:
- a roller adapted to receive a substrate from a printer
- an encoder associated to the roller;
- a media advance mechanism adapted to advance the substrate;
- a media advance sensor remote from the encoder adapted to measure a length of substrate advanced;
- and
- a controller connected to the media advance mechanism, the encoder and the media advance sensor;
- wherein the controller is to activate media advance mechanism thereby advancing the media for a length determined by the media advance sensor, to receive from the encoder the angular displacement of the roller caused by the media advance and to determine a roller compactness parameter in view of the angular displacement, the length and a thickness of the substrate.
Dependencies are inferred from the claim text.