in this presentation i have explained about dual axis control of servo motor using joystick and arduino as a microcontroller. it can be also used as a dual axis camera controller.

1. Prepared by:
Pathan Hanif
hpathan29@gmail.com
DUAL AXIS CONTROL OF SERVO MOTOR
BY JOYSTICK

2. Flow Of Presentation
 Introduction
 List of component
 Information about component
 Circuit diagram
 Working
 Application
 Conclusion
 Reference

3. Introduction
 We made a dual axis control of servo motor using joystick. we use camera
as a object which have to rotate by servomotor in both axis.
 I this project we use
 Camera
 Arduino Uno
 Joystick
 Two Servo motor


4. List of Components
 Servo motor (SG90)
 Joystick
 Arduino uno
 Breadboard
 Cables

5. Servo motor
 The servo motor is most commonly used for high technology devices in
the industrial applications like automation technology.
 It is a self contained electrical device, that rotates parts of machine with
high efficiency and great precision. Moreover the output shaft of this
motor can be moved to a particular angle.
 A servomotor is a rotary actuator or linear actuator that allows for
precise control of angular or linear position, velocity and acceleration.
 It consists of a suitable motor coupled to a sensor for position feedback.
 The servo circuitry is built right inside the motor unit and has a
positionable shaft, which usually is fitted with a gear . The motor is
controlled with an electric signal which determines the amount of
movement of the shaft.
 The set-up in figure below shows: a small DC Motor, Potentiometer and
a control circuit.
 The motor is attached by gears to the control wheel. As the motor
rotates, the potentiometer's resistance changes, so the control circuit
can precisely regulate how much movement there is and in which
direction.

6.  The set-up in figure below shows: a small DC Motor, Potentiometer and a control circuit.
 The motor is attached by gears to the control wheel. As the motor rotates, the potentiometer's
resistance changes, so the control circuit can precisely regulate how much movement there is and in
which direction.
 When the shaft of the motor is at the desired position, power supplied to the motor is stopped. If
not, the motor is turned in the appropriate direction.
 The motor's speed is proportional to the difference between its actual position and desired position.
 Servos are controlled by sending an electrical pulse of variable width, or pulse width
modulation (PWM), through the control wire. Servo motor works on the PWM principle, which
means its angle of rotation is controlled by the duration of pulse applied to its control PIN. Basically
servo motor is made up of DC motor which is controlled by a variable resistor (potentiometer) and
some gears.
 . A servo motor can usually only turn 90° in either direction for a total of 180° movement.
Continued…

7. JOYSTICK MODULE
The Joystick module is similar to analog joysticks found in gamepads. It is
made by mounting two potentiometers at a 90 degrees angle.
Moving the joystick will cause the output to vary from 0v to 5V depending on
its direction .
Directional movements are simply two potentiometers - one for each axis. Pots are
~10k each. This joystick also has a select button that is actuated when the joystick is
pressed down. This is a Joystick module that has X,Y analog outputs and has a
switch that detects button press.
If you connect this module to a microcontroller, you can expect to read a value of around 512 in its resting position
(expect small variations due to tiny imprecisions of the springs and mechanism) When you move the joystick you
should see the values change from 0 to 1023 depending on its position.
Specifications:
 Arduino, Raspberry Pi, and MSP430 compatible
 Ability to control X and Y axis
 Push-button switch built into the joystick, just push the
joystick inward to engage the switch

8. Applications of joystick
 Joystick that can be interfaced with Arduino, Raspberry Pi,
and other Microcontrollers and Embedded Boards
 Joystick for custom designed/experimental RC planes, RC
Cars
 Joystick for CNC Machines or other industrial controls
 Electronic games pads similar to PlayStation.
Pin details:
1. GND: ground
2. +5V: 5V DC
3. VRx: voltage proportional to x position
4. VRy: voltage proportional to y position
5. SW: switch pushbutton

9. Circuit diagram

10. Working
•When the joystick module moves in the horizontal or in the vertical direction, it gives us values from 0 to
1023.
• So we can apply a condition in the code that if the value is less than 300 or greater than 700, then the servos
will move.
•When the joystick is moved in the horizontal direction, the first servo will move towards right or left and
upon moving the joystick in the vertical direction, the second servo will move towards the right or left.

11. Application
 Robotics
 Conveyor Belts
 Camera Auto Focus
 Robotic Vehicle:
 Solar Tracking System
 Metal Cutting & Metal Forming Machines:
 Antenna Positioning
 Woodworking/CNC
 Textiles
 Printing Presses/Printers

12. Conclusion
By doing this project we learned about
 Programming of arduino
 Dual axis operation
 Servo motor control
 Joystick operation
and we done all this things with minimum components and cost.

13. Referance
 Arduino.cc
 Wekipedia
 google