초록 ▼

An encoder produces a plurality of different phase signals. A detecting unit detects all edges of the plurality of different phase signals from the encoder. A central processing unit (CPU) measures edge intervals of edges succeeding with respect to time. A first process is for obtaining a control ta

An encoder produces a plurality of different phase signals. A detecting unit detects all edges of the plurality of different phase signals from the encoder. A central processing unit (CPU) measures edge intervals of edges succeeding with respect to time. A first process is for obtaining a control target value on the basis of a value measured by the CPU, and a second process is for controlling the drive speed of the drive source on the basis of the result of comparing the value measured by the CPU and the control target value.

대표청구항 ▼

[ What is claimed is:] [1.] A motor velocity controlling method utilizing:an encoder for producing a plurality of different phase signals according to a rotation amount of a motor;detecting means for detecting all edges of said plurality of different phase signals; andmeasuring means for receiving s

[ What is claimed is:] [1.] A motor velocity controlling method utilizing:an encoder for producing a plurality of different phase signals according to a rotation amount of a motor;detecting means for detecting all edges of said plurality of different phase signals; andmeasuring means for receiving said edges detected by said detecting means to measure intervals of edges succeeding with respect to time,said motor velocity controlling method comprising:a first process for obtaining a control target value on the basis of a value produced from said measuring means; anda second process for controlling a drive speed of said motor on the basis of a result of comparing said value from said measuring means and said control target value, wherein in said first process, said detecting means detects leading edges and trailing edges of A-phase and B-phase signals from said encoder, and said measuring means measures four edge intervals which are an interval between the leading edge of said A-phase signal and the leading edge of said B-phase signal, an interval between the leading edge of said B-phase signal and the trailing edge of said A-phase signal, an interval between the trailing edge of said A-phase signal and the trailing edge of said B-phase signal, and an interval between the trailing edge of said B-phase signal and the leading edge of said A-phase signal, to obtain said control target value for each of said four edge intervals, and updates a control command to said motor once per period of said four intervals.