Industrial Servo Motor Yaskawa New 30W 100V AC SERVO MOTOR SGM-A3A312C New in Box

Industrial Servo Motor Yaskawa New 30W 100V AC SERVO MOTOR SGM-A3A312C New in Box

 

 

 

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In contrast, a servo motor is never at rest when ON, due to the constant closed loop error correction, while only using the energy required to maintain its commanded position. The constantly varying positionloop error causes the servo’s output shaft to move back-and-forth (though it should not be noticeable), while continuously looking for minimum error. This continuous back-and-forth actuator motion is called, hunting, similar to another term, dither, a purposely induced actuator movement (e.g. valve to continuously overcome the issues of stiction).

 

The physical displacement during hunting, typically involves only a few feedback counts, relative to the total resolution: what is unnoticeable in most applications, can be unacceptable in others (higher resolution feedback devices reduce the typical hunting delta). Where repeatability and resolution are an issue, traditionally servo motor territory, steppers may now be considered. For steppers, the requirement is that the load must be predictable, or subject to only small external forces and disturbances, where tight coordination between axes is not required. Steppers, running open loop, can save an initial machine cost of greater than 20-30% over comparable servo solutions.