This document presents a project on developing a grass cutting robot. It discusses the goals of creating a machine that can safely cut grass on hillsides. It includes block diagrams of the system and power supply. The main hardware components are described - a chassis, wheels, blades, battery, Bluetooth module, motor driver, motor and IR sensor. It discusses existing lawn cutting methods and their drawbacks. The proposed grass cutting robot provides advantages like being smaller, cheaper, quieter and using less power. Fabrication details are provided along with future potential additions like reducing weight and adding a water sprinkling system. In conclusion, the robot can reduce human effort and hazards of grass cutting.

1. A project presentation on
GRASS CUTTING ROBOT
BY
Under the esteemed guidance of
Miss. A.UVARANI,B.Tech.,
DEPARTMENT OF MECHANICAL
DEPARTMENT OF MECHANICAL ENGINEERING
SREE VIDYANIKETHAN ENGINEERING COLLEGE
2nd Shift Polytechnic
Sree Sainath Nagar, A.Rangampet, Tirupati – 517 102.
2014-2017
1
NAMES ROLL NUMBERS
K HEMANTH KUMAR 14291-M-052
B SUMANTH KUMAR 14291-M-011
D SREEHARSHA 14291-M-024
A AKHIL 14291-M-002
K SAI KIRAN 14291-M-049
D DINESH KUMAR REDDY
K CHANDRA SEKHAR REDDY
14291-M-031
14291-M-048

2. CONTENTS
 Introduction
 Block diagram
 Power supply
 Hardware requirement
 Existing method and their drawbacks
 Proposed method
 Fabrication of robot
 Future Scope
 Conclusion
 References

3. Introduction
 The goal of the Grass Cutting Robot was to develop a
functional moving machine that would be capable of moving
extremely hillsides without compromising anyone’s safety,
including that of the operator.
 This project uses 750mA power supply, 8051 micro controller
& 7805 three terminal voltage regulator is used for voltage
regulation
 It is latest technology which is operated through Smartphone
with help of Bluetooth module.

4. Block diagram
Fig 1:- Flow chart

5. Power supply
Fig 2:- Power Supply Flow Chart

6. Hardware requirement:
 Chassis
 Wheels
 Blades
 12v Battery
 Bluetooth module
 Motor driver
 Motor
 IR sensor

7. Chassis
 Powder coated Metal chassis for robots. Easy to mount the motors on place
by using normal motor mount nut.
 It can either be used in skid steel configuration (5 motors) or differential
configuration (2 rear wheels + 2 front wheel + 1 front motor).
 The body contains perforated holes for easy mounting of various size circuit
boards and other mechanical components.
Fig 3:- Chassis

8. Wheels
 This is a white screw mount tyre wheel used in different robotics
applications. In this project we used 4 wheels (2 in the front and 2 in
the back.
Features of 4''white Screw Mount Tyre:-
 Width of the tyre: 22 mm.
 Diameter of the tyre: 110 mm.
 Diameter of the Shaft Hole: 6 mm
 On the wheel there are grippers used to
move in sand and grass without skid
Fig 4:- Wheels

9. Blades
Description
 This blade is made of steel used to cut grass in our project.
 The height of the blade can be adjust to 3-5cm height with the
help of three screws.
Features of Blade
 Width of Blade: 10mm
 Length of Blade: 50mm
 Thickness of Blade: 1mm
Fig 5:- Blades

10. Battery
 An electric battery is a device consisting of one or more
electrochemical cells with external connections provided to
power electrical devices.
 When a battery is supplying electric power, its positive
terminal is the cathode and its negative terminal is the
anode.
 The capacity of battery is 12V.
Fig 6:- Battery

11. Bluetooth
Bluetooth is a standard used in links of radio of short scope, destined to
replace wired connections between electronic devices like cellular telephones,
Personal Digital Assistants (PDA), computers, and many other devices.
Every device will have to be equipped with a microchip (transceiver) that
transmits and receives in the frequency of 2.4 GHz that is available in the whole
world (with some variations of bandwidth in different countries).
Fig 7:- Bluetooth
module

12. Electromagnetic direct current (DC) motors
 Usually runs high speed and low torque.
 Motor rotates at 60 – 100 rpm.
Motor
Fig 8:- Motor

13. IR sensor
• The module consist of a IR emitter and IR receiver pair. The high
precision IR receiver always detects a IR signal.
Fig 9:- IR sensor

14. EXISTING METHOD & THEIR DRAWBACKS
Existing Method Drawbacks
 Expensive is High.
 Noise level is High.
 Weight of Lawn Mower is
high as compared to Grass
Cutting Robot.
 Power Consumption is more.
Fig 10 :-Electrical Lawn Mower

15. Existing Method Drawbacks
 Expensive is High.
 Noise in Operation.
 Pollution to Environment.
 Fuel Consumption is more.
 Size is big.
 Water Sprinkle is not there.
Petrol Engine Lawn Mower
Fig:-11

16. PROPOSED METHOD
Proposed Method Advantages
Grass Cutting Robot  Small in Size.
 Expensive is Less.
 Noise level is Less.
 Weight is Less.
 Power Consumption is less.
 Sprinkle of water.
Fig:-12

17. Fabrication of Robot
Chassis
Blades
Wheels

18. Advantages
 Easy controlling.
 Operated in Dangerous Places where human cannot go.
 It can Stop When any obstacles Suddenly come in front of
Grass Cutting Robot.
 The Blade can be adjustable for cutting different height of
grass.

19. Disadvantages
 Battery backup is low.
 Grass will cut within the blade limits.
Applications
 Grass Cutting
 Agriculture

20. Future Scope
 To allow greater flexibility in design.
 The weight of lawn cutter can be
reduced by fiber
plastic instead of Mild steel.
 It can also equipped with
water sprinkling system for watering
the plants and grass

21. Conclusion
 From this project we conclude that the grass cutting robot will
reduces the human effort in performing grass cutting operation
and also reduces the accidental hazards in a hilly areas while
performing grass cutting operation by utilizing the wireless
technology

22. References
 [1] “Design and Development of a Lawn Mower”: International Journal
of Scientific & Engineering Research, Volume 5, Issue 6, June-2014.
 [2] Guo-shing Huang and Keng-Chih Lin proposed “ Intelligent
auto-saving energy robotic lawn mower”. IEEE transaction on robotics.
Pg 4130 to 4136 In 2010,
 [3] Muhammad Wasif proposed “ Design and implementation of
autonomous lawn-mower robot controller” IEEE 2011 transaction
paper. In 2011,
 [4] Junho Yang and Soon-Jo Chung proposed “vision-based
localization for an autonomous mower”. IEEE intelligent robots and
systems (IROS) nov 3-7 tokyo, japan. In 2013,