Patent ID: 6779868
Filing Date: 2004-08-24
Classification: B41J

Abstract:
A printer comprising:a housing; a track installed within the housing; a carriage moveably installed on the track; a print head installed on the carriage for ejecting ink onto a medium; a position detecting mechanism comprising a first portion installed at a calibration position neighboring the track, and a second portion installed on the carriage; and control circuitry for controlling operations of the printer and recording the calibration position at the track, the control circuitry comprising a counter for recording a counted position of the second portion of the position detecting mechanism; wherein the calibration position is within a range which the print head is capable of printing the medium, and the second portion is capable of passing by the first portion when the print head simultaneously ejects ink onto the medium; wherein when printing the medium, if a difference between the position of the second portion corresponding to the track recorded by the counter and the position of the calibration position at the track recorded by the control circuitry is within a first predetermined range, the control circuitry does not need to calibrate the position of the carriage.