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The Servo motor consists of a huge gear combination inside the motor with the potentiometer which decides the degree of the rotation of the motor. The maximum duty cycle of width 2 ms is subtending 180 degrees.The duty cycle of width 1.5 ms is subtending 90 degrees.

The minimum duty cycle of width 1 ms is subtending 0 degrees.

As per the above diagram, we may see, that The angular rotation of the servo motor depends on the clock’s duty cycle (ON Period). The error when applied back to the DC motor armature results in amplification of the input, and the motor moves with a more powerful speed. The voltage produced is again fed back to the control unit and the comparator finds the error as ERROR= Output voltage (feedback signal)- Input Voltage(fed signal). Here we are describing the servo motor working.

Corresponding to the angular velocity of the motor shaft and gear mechanism, voltage is produced as a feedback signal which is sensed using a sensing device.

As a result, the motor rotates as per the voltage applied through the pulses.

PLC motion controller from the control unit generates the electric pulses, which is fed to the DC Motor.*Servo Motor = DC Motor + Gear Assembly + Position sensing device* The magnetic field produced for both are different The magnetic field produced for both are the same The motors have two types of coils inside namely the Stator armature coil and the Rotor armature coil. Synchronous or Asynchronous servo motors are categorized based on “types of magnetic field “ produced inside armature.Brushed motors are simple and easy to rotate with noise whereas brushless are used to achieve higher efficiency with less noise. Brushed or Brushless servo motors are categorized based on “types of commutators “, they are designed of.AC servo motors withstand higher currents and are mostly used where high repetition and precision are required whereas, DC servo is mostly used to carry fewer loads. AC or DC servo motors are categorized based on the “types of currents “, they operate.It has three types of classifications – AC or DC servo motors, Brushed or Brushless motors, and Synchronous or Asynchronous motors.It is controlled by analog and digital types of electric signals.Note: Servo Motors are nothing but a regular DC motor coupled with a sensor to provide positional feedback or feedback signal. Servo motors are the part of closed-loop systems in which the control unit, amplifier, shaft, encoder and servo motor all are connected in a loop with each other. It converts the feedback electric signals to angular velocity or angular position. A servo system is a closed-loop system where the feedback signal (output signal) in parameters like position, velocity, acceleration, etc.The servo arm maximum turn limit is 180 degrees and by connecting the servo with Arduino, one can control the position of servo motors.

They can easily turn to specified positions, using the positional feedback system discussed below.

They are in general, high efficiency and great precision operational motors.

In metal cutting and forming the machinery.

Today in the era of industry 4.0, we are using servo motors heavily, to meet the increasing demands of commercialization and industrialization. Servo motors are used in every joint to perform precise angular movements. What is Servo motor and its applications?

What are Servo motors and their applications?.

The tutorial is going to be useful in case u want to know Hello Techies, welcome back to another amazing tutorial on “Working of Servo motors using Arduino “.