Abstract: Disclosed are apparatus and methods for compensating for the change in length of an encoder strip due to environmental effects such as temperature and humidity. The apparatus and methods utilize two simple optical sensors spaced apart and mounted on a substrate having a different coefficient of thermal expansion than the encoder strip; the substrate is mounted to the movable component which is to be positioned, such as a printer carriage. Embodiments of the methods utilize information from the two sensors, in conjunction with information from the analog encoder used to position movable component, to compensate for environmental effects.

Abstract: Embodiments of a method and apparatus for adjusting power are disclosed.

Abstract: An embodiment of an air heating apparatus includes a mass to store heat energy and a heater to provide the heat energy to the mass.

Abstract: An apparatus includes a tray, a sensor, and a transport mechanism. The tray holds a media stack. The transport mechanism moves the tray past the sensor to scan a side of the media stack.

Abstract: A passive linear encoder includes a loop and a sensor. The loop is configured to engage print media and to move in concert with, and under power of, the print media. The sensor is positioned to scan indicia defined on an inner surface of the loop.