ROBOTICS
Manual Robotics Autonomous
RB 001 (TUT 1)
What will we learn today?
We’ll make a simple remote
controlled robot which can be
made to move in any desired
direction
Make teams of 4-5 who are determined to ‘MAKE THIS HAPPEN’
Tools required
• Hacksaw / Jigsaw
• Hand drill / Power drill
• Spanners
• Pliers
• Screwdriver
• Wire Stripper
Differential Drive System
Materials required
• Wood
• Nuts and bolts
• Motors
• Wheels
• Clamps & flanges
• Batteries
• Wires
• Switches
Basic structure
• Wood (Easiest material to work with)
• Acrylic
• Aluminium
• Simplest shape to cut : Rectangular
Motor
• Electromechanical devices which converts EE into ME
• Two terminals
• Can rotate in both directions
• Main Specifications:
– RPM (Rotations per minute)
– Torque (kgcm)
– Voltage (V)
Motor Parts
• Shaft: It is where we attach wheel or an other mechanism
• Gearbox: This is to reduce the basic rpm of the motor to the desired one.
• Motor: High RPM motor which is then reduced using gearbox.
GEAR BOX MOTOR SHAFT
Wheels
• Normal Wheels
• Omni Wheels
Motor-wheel assembly
• Motors connected to wheels using flanges or by tight-fit
Clamping motor-wheel to chassis
–‘C’ clamps
–‘U’ clamps
–‘L’ clamps
–Special clamps
Fixing of castor wheel
• Align castor such that chassis remains parallel to the ground.
Why 3 wheels & not 4 wheels?
• To define a plane uniquely, you require atleast 3 points, but if we have 4 points we need to make sure that all the four points lie in a plane.
• Hence, 3 is the preferred choice. We need suspensions incase of 4 wheels
Placement of battery • Make sure Center of Gravity remains as low as
possible.
• Lead acid, LiPO(Lithium Polymer), Ni-Mh
Motor control
• DPDT ( Double Pole Double Throw ) switches controls each motor.
Final Bot Structure
Cost Estimate
How to get involved??
• Techsoc: Manual & Autonomous Robotics
• Make your own remote controlled robot
• Involve yourself with seniors who are into robotics
• Volunteer for ongoing projects in CFI.
• Tech fests of other colleges and institutions
Prerequisites for the iBOT?
Enthusiasm
Commitment
Curiosity
Shops In Chennai
• Ritchie street (Electronics Market): –Modi electronics, Ajanta Electronics
• How to reach – 23C from Main Gate – 5C from Taramani – Train to Chintadripet from Kasturibai nagar
• Parrys (Hardware Market): –For materials: Chanels, clamps, tools etc.
• How to reach – 5C from Taramani – Train to Chennai Beach from Kasturibai nagar
Reference sites • www.howstuffworks.com
• www.societyforrobots.com
• www.robokits.com
• www.thinklabs.com
• www.rhydolabz.com
• www.sparkfun.com
• www.digikey.in
• www.nexrobotics.com