Patent ID: 7530658
Filing Date: 2009-05-12
Classification: B41J

Abstract:
1. A printer comprising: a motor; an encoder, configured to be opposed to a scale provided with a plurality of marks or slits arranged in a first direction at predetermined intervals; comprising: a controller, which detects a rotational position of the motor and a rotational speed of the motor based on at least one of the first output signal, the second output signal, the third output signal, and the fourth output signal, and which controls the rotational speed of the motor by PID control based on the detected rotational position and the detected rotational speed, wherein: the controller stores a target speed table having a target rotational speed corresponding to the rotational position; and the target speed table having the target rotational speed corresponding to the rotational position which is detected on the basis of at most three of: the first output signal, the second output signal, the third output signal, and the fourth output signal.