Determinations of lengths of web medias
AssigneeHewlett-Packard Development Company, L.P.
InventorsRamon Llosa, Javier Maqueda Castellote, Jorge Espert Cervera, Roger Casasayas Panella
Life of this patent
Estimating the term…
Abstract
An example media handling system includes a web media holder with a core hub capable of coupling to a core of a web media roll, a sensor to take a measurement at the circumferential surface of the web media roll, and a controller to determine a length of the web media roll. In that example, the controller may determine the length of the web media roll based on a first distance measurable by the sensor when the core hub is in a first orientation, a second distance measureable by the sensor when the core hub is in a second orientation after a number of rotations with respect to the first orientation of the core hub, and reference value corresponding to the core.
Claims13
A media handling system comprising:
- a web media holder including a core hub, the core hub coupleable to a core of a web media roll;
- a sensor to take a measurement at the circumferential surface of the web media roll;
- and
- a controller to determine a length of the web media roll based on:
- a first data that represents a first distance measurable by the sensor when the core hub is in a first orientation;
- a second data that represents a second distance measureable by the sensor when the core hub is in a second orientation after a number of rotations with respect to the first orientation of the core hub;
- a third data that represents a reference value corresponding to the core;
- and
- a spiral length calculation based on a thickness of the web media, a core radius, a radius of the web media roll as measured by the sensor, a number of available rotations of the web media roll, and a third distance between the web media roll and a print zone of a print apparatus of which the media handling system is a component.
A non-transitory computer-readable storage medium comprising a set of instructions executable by a processor resource to:
- retrieve a first sensor data representing a first distance measurement corresponding to a circumferential surface of a web media roll when sustained by a media holder of a print apparatus;
- retrieve a second sensor data representing a second distance measurement corresponding to the circumferential surface of the web media roll when sustained by the media holder after the web media roll is rotated a number of times;
- determine a length of the web media available of the web media roll based on:
- a difference between the first distance measurement and the second distance measurement;
- and
- the number of times of rotation of the web media roll between a time of the first distance measurement and a time of the second distance measurement;
- calculate a thickness of the web media based on the number of rotations and a difference between the first distance and the second distance;
- identify an environment condition classification corresponding to a print apparatus;
- and
- store a first media data representing the thickness of the web media and a second media data representing the environment condition classification in a data structure corresponding to a media profile of the web media.
A method of operating a print apparatus, the method comprising:
- causing a sensor to measure a first distance to a circumferential surface of the web media roll sustained by a media holder;
- causing a core hub of the media holder to rotate a number of times;
- causing the sensor to measure a second distance to the circumferential surface of the web media roll after the core hub is rotated the number of times;
- determining a thickness of the web media based on a difference between the first distance and the second distance;
- determining a remaining length of the web media based on the media thickness and a difference between a first value corresponding to a media radius of the web media roll and a second value corresponding to a core radius of the web media roll;
- causing the thickness to be stored in a data structure representing a media profile corresponding to the web media;
- and
- causing presentation of a notification on a user interface about the remaining length of web media of the web media roll.
Dependencies are inferred from the claim text.