Drive control system of stepping motor and drive control method technical field

Abstract

Provided are a stepping motor drive control device and a drive control method capable of suppressing increase of the number of parts and generation of vibration and noise by a stepping motor by using simple control. The drive control device for a stepping motor (5) which controls a drive frequency of the stepping motor (5) according to a measurement value inputted at a predetermined cycle. The drive control device includes storage means (8) which stores the resonance frequency of the stepping motor (5) based on the resonance characteristic of the stepping motor (5) as an output inhibit drive frequency; and control means (7) which calculates an instruction angle for operating a needle (3) in accordance with the measurement value, acquires a first drive frequency of the stepping motor (5), judges whether the calculated first drive frequency is the output inhibit drive frequency, and decides the drive frequency by replacing the first drive frequency with the second drive frequency lower than the output inhibit drive frequency if the first drive frequency is the output inhibit drive frequency.

Dependencies are inferred from the claim text.