PRINTER AND SHEET FEEDER

摘要

PROBLEM TO BE SOLVED: To deal with a continuous sheet of various sizes by switching a minimum control unit of a motor in response to a sheet size, detecting a rotating position of the motor, and controlling the motor to stop at a position based on it. SOLUTION: A motor rotation controller 15 instructs a drive to accelerate, constantly rotate or decelerate a motor 22, and outputs its signal together with a switching signal. A motor rotation gain switching circuit 16 outputs acceleration, constant speed or deceleration gain in response to a control of 1/2 or 1/6 inch unit according to them. Further, it outputs a pulse train, and supplies the gains and the pulse train to a motor driver 21. And, a stopping position detecting encoder receiver 11 receives a pulse signal for indicating a rotating position of the motor 2 from the stopping position detecting encoder 24 of the motor 22, further receives a switching signal from an MPU 11 via an I/O port 13. An encoder output switching circuit 18 outputs a rotating position detection pulse, and a motor stopping position controller 19 controls its stopping rotating position.