Frequently Asked Questions
Servo drivers are responsible for the motion control by precisely calculating the path or trajectory needed and sending command signals to the motor. Servo drives can control velocity, position, as well as torque; which is the main parameter it controls.
A servo drive is a basic element of a motion control system which also includes a servo motor, controller, and feedback element. Servo drives take a command signal for position, velocity or current and adjust the voltage and current applied to the servomotor based on closed-loop feedback.
Note that servo drives are also sometimes called amplifiers because they take the control signal from the controller and amplify it to deliver a specific amount of voltage and current to the motor.
Servo motors are often found in precision robotic vehicles such as military bomb detonation and factories where cutting and forming metal needs to be precise like that of a car factory.
You’ve come across a product created by or device that uses a servo motor and servo drive without even realizing it.
The controller is responsible for calculating the path or trajectory required and sends the command signals to the drive.
The drive then sends the necessary voltage and current to the motor to achieve required motion.
Servo drives can control torque, velocity or position. With ESI Motion’s Graphical User Interface (GUI) & HiDS software the user can set the required parameters themselves and make adjustments as needed.
A common variation is the torque-mode amplifier. These convert the command signal from the controller into a specific amount of current to the motor. Because current is directly proportional to torque, the drive is controlling the amount of torque that the motor produces.
A linear drive (in which current is proportional to force) there’s direct control of the motor’s force output.
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