DIGITAL SPEED CONTROLLER AND DIGITAL SPEED CONTROL METHOD, DIGITAL MOTOR CONTROLLER, PAPER CONVEYING DEVICE, PROGRAM FOR PERFORMING THE METHOD WITH COMPUTER, COMPUTER-READABLE RECORDING MEDIUM, AND IMAGE FORMING DEVICE

摘要

PPROBLEM TO BE SOLVED: To provide a digital speed controller that can conduct precise control. PSOLUTION: The digital speed controller 10 has a moving distance detection unit 500, which acquires an amount of displacement by a minimum unit, corresponding to a sampling period as a conveyance belt 301, a target speed calculation unit 101 that calculates the target speed of the belt 301 based on the sampling time a present speed calculation unit 102 with which the present speed of the conveyance belt 301 is calculated from the difference in the displacement amount and the sampling time, a target speed determining unit 105 which determines whether the target speed is smaller than a given value, a speed correction unit 106 that replaces the present speed with the set value, when the target speed is smaller than the given value and the present speed is the smallest unit of the speed is only the displacement amount per smallest unit per sampling period as it is in amount, a speed error calculation unit 103 which calculates the error in the replaced set value and the target speed, and a regulator unit 104 which controls a drive motor 200, based on a speed error. PCOPYRIGHT: (C)2007,JPO&INPIT