Patent ID: 8251475

Claim:
An inkjet printing system comprising: a roller for advancing a recording medium along a recording medium advance direction into a print region; a platen disposed downstream of the roller for supporting the recording medium in the print region for printing; an inkjet printhead disposed downstream of the roller, which inkjet printhead ejects drops of ink onto the recording medium when the recording medium is disposed in the print region for printing and beyond the recording medium when in borderless printing mode; a carriage for moving the printhead along a carriage scan direction that is substantially perpendicular or perpendicular to the recording medium advance direction; at least one motor for driving the roller and moving the carriage; a two-dimensional sensor mounted on the carriage which two-dimensional sensor is configured to sense: a) at a first position, the recording medium; b) at a second position, the roller and the recording medium; and c) at a third position, the roller; and a controller for receiving electrical signals from the two-dimensional sensor and for controlling the at least one motor.