ROBOTICS

Course Objectives:
1. To give students practice in applying their knowledge of mathematics, science, and
Engineering and to expand this knowledge into the vast area of robotics.
2. The students will be exposed to the concepts of robot kinematics, Dynamics,
Trajectory planning.
3. Mathematical approach to explain how the robotic arm motion can be described.
4. The students will understand the functioning of sensors and actuators.
5. To be familiar with the automation and brief history of robot and applications.
6. To give the student familiarities with the kinematics of robots.
7. To give knowledge about robot end effectors and their design.
8. To learn about Robot Programming methods & Languages of robot.
9. To give knowledge about various Sensors and their applications in robots.
Course Outcome:
1. Students will be equipped with the automation and brief history of robot and
applications.
2. Students will be familiarized with the kinematic motions of robot.
3. Students will have good knowledge about robot end effectors and their design concepts.
4. Students will be equipped with the Programming methods & various Languages of
robots.
5. Students will be equipped with the principles of various Sensors and their applications
in robots.

UNIT-I
INTRODUCTION: Automation and Robotics, CAD/CAM and Robotics –An over view of
Robotics – present and future applications – classification by coordinate system and control
system.

NO. OF
S.No UNIT UNIT-DESCRIPTION
HOURS
1 Introduction 1
2 Automation and Robotics, CAD/CAM and Robotics 1
3 An over view of Robotics 1
4 An over view of Robotics 1
5 Present and future applications 1
6
1 1
Classification by coordinate system
7 Classification by control system 1
8 Revision 1
9 Class test 1
Unit Total hours 9
 UNIT-1
INTRODUCATION
The field of robotics has its origins in science fiction. The term robot was derived from
the English translation of a fantasy play written in Czechoslovakia around 1920. It took another
40 years before the modern technology of industrial robotics began. Today. Robots are highly
automated mechanical manipulators controlled by computers. In this chapter. We survey some
of the science fiction stories about robots, and we trace the historical development of robotics
technology.
Robotics: -
Robotics is an applied engineering science that has been referred to as a combination
of machine tool technology and computer science. It includes machine design, production
theory, micro electronics, computer programming & artificial intelligence.
Or
"Robotics" is defined as the science of designing and building Robots which are suitable
for real life application in automated manufacturing and other non-manufacturing
environments.
Industrial robot: -
The official definition of an industrial robot is provided by the robotics industries
association (RIA). Industrial robot is defined as an automatic, freely programmed, servo-
controlled, multi-purpose manipulator to handle various operations of an industry with variable
programmed motions.
Automation and robotics: -
Automation and robotics are two closely related technologies. In an industrial context,
we can dean automation as a technology that is concerned with the use of mechanical,
electronic, and computer-based systems in the operation and control of production Examples
of this technology include transfer lines. Mechanized assembly machines, feedback control
systems (applied to industrial processes), numerically controlled machine tools, and robots.
Accordingly, robotics is a form of industrial automation.
Ex: - Robotics, CAD/CAM, FMS, CIMS
Types of Automation: -
Automation is categorized into three types. They are,
1)Fixed Automation
2)Programmable Automation
3)Flexible Automation.
(1) Fixed Automation: -
It is the automation in which the sequence of processing or assembly operations to be
carried out are fixed by the equipment configuration. In fixed automation, the sequence of
operations (which are simple) are integrated in a piece of equipment. Therefore, it is difficult
to automate changes in the design of the product. It is used where high volume of production
is required Production rate of fixed automation is high. In this automation, no new products are
processed for a given sequence of assembly operations.
Features: -
i) High volume of production rates,
ii) Relatively inflexible in product variety (no new products are produced).
Ex:- Automobile industries … etc.
(2) Programmable Automation: -
It is the automation in which the equipment is designed to accommodate various
product configurations in order to change the sequence of operations or assembly operations
by means of control program. Different types of programs can be loaded into the equipment to
produce products with new configurations (i.e., new products). It is employed for batch
production of low and medium volumes. For each new batch of different configured product,
a new control program corresponding to the new product is loaded into the equipment. This
automation is relatively economic for small batches of the product.
Features: -
i) High investment in general purpose,
ii) Lower production rates than fixed automation,
iii) Flexibility & Changes in products configuration,
iv) More suitable for batch production.
Ex:- Industrial robot, NC machines tools… etc.
(3) Flexible Automation: -
A computer integrated manufacturing system which is an extension of programmable
automation is referred as flexible automation. It is developed to minimize the time loss between
the changeover of the batch production from one product to another while reloading. The
program to produce new products and changing the physical setup i.e., it produces different
products with no loss of time. This automation is more flexible in interconnecting work stations
with material handling and storage system.
Features: -
i) High investment for a custom engineering system.
ii) Medium Production rates
iii) Flexibility to deal with product design variation,
iv) Continuous production of variable mixtures of products.
Ex:- Flexible manufacturing systems (FMS)
Advantages: -
1. High Production rates
2. Lead time decreases
3. Storing capacity decreases
4. Human errors are eliminated.
5. Labour cost is decreases.
Disadvantages: -
1. Initial cost of draw material is very high,
2. Maintenance cost is high,
3. Required high skilled Labour
4. Indirect cost for research development & programming increases.
Reasons for implementation of automated systems in manufacture industries: -
The reasons for the implementation of automated systems in manufacturing industries
are as follows,
(i) To Increase the Productivity Rate of Labour
(ii) To Decrease the Cost of Labour
(iii) To Minimize the Effect of Shortage of Labour
(iv) To Obtain High Quality of Products
(v) A Non-automation nigh Cost is Avoided
(vi) To Decrease the Manufacturing Lead Time
(vii) To upgrade the Safety of Workers.

Need For using robotics in industries: -

Industrial robot plays a significant role in automated manufacturing to perform different
kinds of applications.
1. Robots can be built a performance capability superior to those of human beings. In terms of
strength, size, speed, accuracy…etc.
2. Robots are better than humans to perform simple and repetitive tasks with better quality and
consistence’s.
3. Robots do not have the limitations and negative attributes of human works. such as fatigue,
need for rest, diversion of attention…. etc.
4. Robots are used in industries to save the time compared to human beings.
5. Robots are in value poor working conditions
6. Improved working conditions and reduced risks.
CAD/CAM & Robotics: -
CAD/CAM is a term which means computer aided design and computer aided
manufacturing. It is the technology concerned with the use of digital computers to perform
certain functions in design & production.
CAD: - CAD can be defined as the use of computer systems to assist in the creation
modification, analysis OR optimization of design.
Cam: - CAM can be defined as the use of computer system to plan, manage & control
the operation of a manufacturing plant, through either direct or in direct computer interface
with the plants production resources.
Specifications of robotics: -
1. Axil of motion
2. Work stations
3. Speed
4. Acceleration
5. Pay load capacity
6. Accuracy
7. Repeatability etc…
Overview of Robotics: -
"Robotics" is defined as the science of designing and building Robots which are suitable for
real life application in automated manufacturing and other non-manufacturing environments.
It has the following objectives,
1. To increase productivity
2. Reduce production life
3. Minimize labour requirement
4. Enhanced quality of the products
5. Minimize loss of man hours, on account of accidents.
6. Make reliable and high speed production.
The robots are classified as,
* Programmable/Reprogrammable purpose robots
*Tele-operated, Man controlled robots
*Intelligent robots.

Robots are used in manufacturing and assembly units such as,

.:. Spot or arc welding
.:. Parts assembly
.:. Paint spraying .
.:. Material, handling
.:. Loading and unloading

The feature and capabilities of the robots are as follows,

* Intelligence
* Sensor capabilities
* Telepresence
* Mechanical design
* Mobility and navigation
* Universal gripper
* System integration and networking.

SCARA: Selective compliance Assembly Robot Arm.

Laws of robotics:
1st law: a robot should not cause any harm to a human operator or harmed
2nd law: a robot must execute the instructions given by an operator.
3rd law: a robot must protect its own existence.

JNTU K previous questions:

1. Define Robotics and discuss the history of robotics.
2. What are the laws of robotics? What are the thumb rules on the decision of a robot
usage?
3. What is automation? Explain different types of automation.
4. Differentiate between fixed and flexible Automation.
5. Compare programmable automation and flexible automation.
6. Write the main characteristics of robot application in industry.
7. Write the present and future applications of robots used in industries.
8. Classify robots based on the Coordinate system and Control system with neat diagrams.