Servo system and encoder
AssigneeKabushiki Kaisha Yaskawa Denki
InventorYasuhiro Matsutani
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Abstract
A servo system includes a motor having a stator and a movable element which moves relative to the stator, an encoder which detects at least one of a position and a speed of the movable element of the motor, and a controller including first circuitry which controls operation of the motor based on a detection result of the encoder. The first circuitry of the controller transmits a first command signal that changes a communication speed between the encoder and the controller from a first speed to a second speed which is higher than the first speed, and the encoder includes second circuitry which changes the communication speed between the encoder and the controller to the second speed when the first command signal is received from the controller.
Claims18
A servo system, comprising:
- a motor comprising a stator and a movable element configured to move relative to the stator;
- an encoder configured to detect at least one of a position and a speed of the movable element of the motor;
- and
- a controller comprising first circuitry configured to control operation of the motor based on a detection result of the encoder,
- wherein the first circuitry of the controller is configured to transmit a first command signal that changes a communication speed between the encoder and the controller from a first speed to a second speed which is higher than the first speed, and the encoder comprises second circuitry configured to change the communication speed between the encoder and the controller to the second speed when the first command signal is received from the controller, and
- wherein the second circuitry of the encoder is configured to determine whether the encoder receives a signal from the controller before a first period elapses, and not to change the communication speed between the encoder and the controller to the second speed when the circuitry of the encoder determines that the encoder receives a signal from the controller.
An encoder device for a servo system, comprising:
- first circuitry configured to change a communication speed from a first speed to a second speed between the first circuitry and a controller which controls operation of a motor based on a detection result of the first circuitry, when a first command signal is received from the controller,
- wherein the controller comprises second circuitry configured to transmit the first command signal that changes the communication speed between the first circuitry and the controller from the first speed to the second speed which is higher than the first speed, and
- wherein the first circuitry is configured to determine whether the circuitry receives a signal from the controller before a first period elapses, and not to change the communication speed between the first circuitry and the controller to the second speed when the first circuitry determines that the first circuitry receives the signal from the controller.
Dependencies are inferred from the claim text.