This document discusses controlling servo motors using an Arduino board. It defines servo motors as motors that can be commanded to precise angular positions between 0 and 180 degrees. It explains that servo motors have three pins - power, ground, and a signal pin to which an angle command is sent. The Arduino language has built-in support for controlling servos. The document outlines the key parts of a servo motor and its working principle, which involves sensing the shaft position and comparing it to the commanded position to minimize error. Controlling servos with Arduino provides benefits like continuous duty, reversibility, and efficient position control.

1. Servo motor controller
Using Arduino
1PICTURE OF SERVO MOTOR

2. PRESENTED BY:-
JITENDRA SUWASIYA (2013/IEE/001)
AMIT KUMAR (2013/IEE/036)
ANIL KUMAR (2013/IEE/042)
GUIDED BY:-
Mr, Bishnu mohan Jha sir
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3. Introduction to Arduino
Arduino is an open-source prototyping platform
based on easy-to-use hardware & software and
are able to read Inputs.
 Arduino Boards has mainly 3 types of signal
ports:
• (i)Digital ports : means something is either on or
off
• (ii)Analog ports : means it can have a continuous
range of values.
• (iii)Power ports : it provides the power supply.
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4. 4PICTURE FOR ARDUINO

5. Introduction to Servo Motors Control &
Arduino
A servo is a motor that we can command to
go to particular angle .
A servo has 3 pins:
 (i) Power (normally red)
 (ii)Ground (normally black)
 (iii) Signal pin (normally white)
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6.  Servos are given a command of what angle to
be turn (between 0 deg. & 180 deg.) and turn
precisely to that location.
The Arduino language has support for servos
built-in which makes the servos really easy to
use.
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7. PARTS Of Servo Motor
It consists of a suitable motor , position sensor
and a sophisticated controller.
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8. Working Principle Of Servo Motor
 Servo-motors are used to control position and
speed very precisely , but in a simple case ,
position may be controlled.
Mechanical position of the shaft can be sensed
by using a potentiometer , which is coupled with
the motor shaft through gears .
The current position of the shaft is converted in
to electrical signal by the potentiometer , and
compared with command input signal.
If the feedback signal differs from the given input,
an error signal is generated.
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9. This error signal is then amplified and applied
as the input to the motor , which causes the
motor to rotate . And when the shaft reaches
to the required position , error signal become
zero.
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10. Advantage of servo motor controlling
 Continuous duty
 Reversible.
 Speed is proportional to the applied voltage.
 Torque is proportional to the current.
 Very efficient
 No power required to hold a static load in position
 Flat speed –torque curve
 Peak torque available for short period of time
 Smooth rotation at low speeds
 Good up to 3,000 R.P.M.
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11. Future trends in servo
Due to increase of Automation and development
of new application of servo system it has a high
scope in future.
Due to price reduction there is a beneficial effect
on growth of servo system in future.
Due to continuous technology improvement in
this electronic device it has high scope in future.
The servo drives sector is benefiting from the
popularity of intelligent drives that combine drive
and controller capabilities ,which leading it
towards high growth .
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12. Summary
Servo control system reduces the error of the
system and improves the output mechanism.
Due to blocking of error, the efficiency of the
device decreases.
It is easier to design and implement.
It can operate on both AC or DC.
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13. Reference
Introduction to servo system : By I.A. Getting.
Servo control system :By Elke Laubwald
www.uotechnology.edu.in
www.toolingu.com
Arduino software library (Programming)
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