Determining orientation of a substrate
AssigneeHewlett-Packard Development Company, L.P.
InventorsBrian Carvajal, Francisco Javier Rodriguez, Roger Terradellas
Life of this patent
Estimating the term…
Abstract
An example apparatus is disclosed for transporting a substrate through a printing device. The apparatus comprises a shaft to carry the substrate, a motor to rotatably drive the shaft, a motor driver to provide a control signal to the motor to drive the shaft, a transport arrangement to draw the substrate from the shaft, and a controller to cause the motor driver to drive the shaft at a predetermined rotational speed, to cause the transport arrangement to apply tension to the substrate, and to detect a winding direction of the substrate on the shaft based on the control signal.
Claims15
Apparatus for transporting a substrate through a printing device, the apparatus comprising:
- a shaft to carry the substrate;
- a motor to rotatably drive the shaft;
- a motor driver to provide a control signal to the motor to drive the shaft;
- a transport arrangement to draw the substrate from the shaft;
- and
- a controller to cause the motor driver to drive the shaft at a predetermined rotational speed, to cause the transport arrangement to apply tension to the substrate, and to detect a winding direction of the substrate on the shaft based on the control signal.
A method of determining a winding direction of a roll of print media, the method comprising:
- issuing, by a controller, a control signal to control a motor coupled to the roll of print media to rotate at a predetermined rate;
- pulling a portion of the print media from the roll;
- and
- determining, from the control signal, a winding direction of the print media on the roll of print media.
A conveyance apparatus for a printing apparatus, the conveyance apparatus comprising:
- a rotatable support for a roll of print media;
- a device to generate a signal for controlling the support to a predetermined rotational speed;
- and
- an output roller drivable to draw print media from the support;
- a determining device to determine the orientation of the roll of print media from the signal.
Dependencies are inferred from the claim text.