Generic type rotary encoder and servo motor using the same

A servo motor equipped with a generic type rotary encoder and controller,

• wherein the generic type rotary encoder comprises, a generic sensor that is mounted on a motor and detects rotation angle of the rotary shaft of the motor;
• a rotation angle detector that outputs information on the rotation angle of the rotary shaft of the motor based on an output signal from the generic sensor;
• and an encoder control unit that generates and outputs a multi-rotation absolute signal for driving the motor based on the information of the rotation angle,
• wherein the encoder control unit comprises a unit that drives an initial setting motor, an initial setting data acquisition unit for acquiring initial setting data unique to the generic sensor, a normal operation data acquisition unit that acquires and generates data for normal operation used when the motor to be controlled to which the generic type rotary encoder is mounted is normally operated, an EEPROM recorded calibration data to calibrate the initial setting data unique to the generic sensor, and an encoder control unit that generates and outputs a multi-rotation absolute signal for driving the motor based on the information of the rotation angle,
• wherein, the controller has functions of an initial setting data acquisition unit, a normal operation mode DC servo control unit, a normal operation mode motor control signal (iu, iv, iw) generation unit, and an inverter drive signal generation unit,
• wherein, the calibration data is obtained, by using a standard sensor that guarantees high accuracy of 2 digits or 3 digits higher than the generic sensor, and by simultaneously connecting the generic sensor and the standard sensor to the initial setting motor and driving the initial setting motor at least one forward and reverse rotation,
• wherein, the calibration data is data for calibration relating to the rotation angle of the rotary shaft, and
• wherein, the controller is configured to cause the motor to function as a servo motor based on an external command or information from the generic type rotary encoder.