this presentation gives a clear idea of how the servo motor and servo drive working explained in detail and attached video have a clear idea of how servo motor works......enjoy, i hope you will like this.... :)

1. Sai kumar

2.  A servomotor is a rotary actuator or linear actuator that allows
for precise control of angular or linear position, velocity and
acceleration.
 Essentially, it consists of an
1. electric motor,
2. feedback device,
3. electronic controller.

3.  Motors can be either AC or DC
 Can be of 1 phase or 3 phase.
 DC motors can be brushed or brushless.
 Brushless DC motors are more expensive, drives are more
complex, but are more reliable and maintenance free.
 Feedback device for servomotors is typically an encoder or
resolver built into the motor frame.
 Control circuitry is a motion controller (generates motion) and
a drive to supply power to the motor

4.  AC servo motor
 Dc servo motor
 Continuous rotation servo motor
 Linear servo motor

5. 
Servo drive
PLC (transistor
type)
Servo motor
Power
source
contactor
Load

6.  Position control using Pulse Width Modulation Technique.
 The width of the pulse applied to the motor is varied and send
for a fixed amount of time.
 The pulse width determines the angular position of the servo
motor.
 For example
a pulse width of 1 ms -a angular position of 0 degrees,
a pulse width of 2 ms - a angular width of 180 degrees.

7.  Electronic amplifier used to power electric
servomechanisms.
 A servo drive monitors the feedback signal
from the servomechanism and continually
adjusts for deviation from expected behaviour.

8.  linear relationship b/n speed and electric control signal
 Steady state stability
 Wide range of speed control
 Low mechanical and electrical inertia
 Fast response

10.  Robotics
 Conveyor belts
 Camera auto focus
 Robotic vehicles
 Solar tracking system
 CNC machines
 Antenna positioning
 Metal cutting & metal forming m/c – millimg m/c, lathe,
grinding, pressing, punching, bending in metal fabrication.
 Textiles
 Printers
 Automatic door openers

12. Thank you….