Abstract: A method of adjusting alignment positions of ink dots printed with at least one printhead that is mounted on a moving carriage of an ink jet printer includes printing ink dots on a testchart while the carriage moves over the testchart at a predetermined speed, measuring a relative dislocation (?Y?) of the ink dots, and correcting the alignment of the ink dots by adjusting the position and/or the timing of activation of the printhead in accordance with the measured result. The predetermined speed is smaller than a nominal speed that the carriage is moved over a recording medium in a print process. A misalignment of the ink dots that will be printed when the printhead is moved at the nominal speed is calculated from the measured dislocation (?Y?), the predetermined speed and the nominal speed.