User talk:Edgaralan o/sandbox

Talk: Servo Drive dumping ground

Most servo drives used in industry are digital or analog. Digital drives differ from analog drives by having a microprocessor, or computer, which analyses incoming signals while controlling the mechanism. The microprocessor receives a pulse stream from an encoder which can determine parameters such as velocity. Varying the pulse, or blip, allows the mechanism to adjust speed essentially creating a speed controller effect. The repetitive tasks performed by a processor allows a digital drive to be quickly self-adjusting. In cases where mechanisms must adapt to many conditions, this can be convenient because a digital drive can adjust quickly with little effort. A drawback to digital drives is the large amount of energy that is consumed. However, many digital drives install capacity batteries to monitor battery life. The overall feedback system for a digital servo drive is like an analog, except that a microprocessor uses algorithms to predict system conditions.

Analog drives control velocity through various electrical inputs usually ±10 volts. Often adjusted with potentiometers, analog drives have plug in “personality cards” which are preadjusted to specific conditions. Most analog drives work by using a tach generator to measure incoming signals and produce a resulting torque demand. These torque demands request current in the mechanism depending on the feedback loop. This amplifier is referred as a four-quadrant drive because can accelerate, decelerate and brake in either rotating direction. Traditional analog drives consume less energy than digital drives and can offer very high performance in certain cases. When conditions are met, analog drives offer consistency with minimal “jitter” at standstills. Some analog servo drives do not need a torque amplifier and rely on velocity amplifiers for situation where speed is more important.

Edgaralan o (talk) 15:43, 12 February 2019 (UTC)

Sources: http://www.compumotor.com/catalog/catalogA/A31-A33.pdf

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