INTRODUCTION TO COMPUTER- PARTS, SIMPLE PRACTICAL EXERCISE ON AUTOCAD FOR BUILDING AND MECHANICAL DRAWING
TERM – 2ND TERM
WEEK TWO
Class: Senior Secondary School 3
Age: 17 years
Duration: 40 minutes of 5 periods each
Date:
Subject: Technical Drawing
Topic: INTRODUCTION TO COMPUTER- PARTS, SIMPLE PRACTICAL EXERCISE ON AUTOCAD FOR BUILDING AND MECHANICAL DRAWING
SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to
I.) Define AutoCAD
II.) Discuss the tools use in AutoCAD (draw tools and modify tools)
III.) Use AutoCAD to draw and make designs.
INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source
INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures,
INSTRUCTIONAL PROCEDURES
PERIOD 1-2
PRESENTATION |
TEACHER’S ACTIVITY |
STUDENT’S ACTIVITY |
STEP 1 INTRODUCTION |
The teacher explains the concept, AutoCAD and discuss how useful it is to Technical drawing. |
Students listens attentively to the teacher |
STEP 2 EXPLANATION |
Teacher guide the students to used AutoCAD to draw and make designs on the computer. |
Students exhibit attentiveness and active engagement |
STEP 3 NOTE TAKING |
The teacher writes a summarized note on the board |
The students copy the note in their books |
NOTE
INTRODUCTION TO COMPUTER- PARTS, SIMPLE PRACTICAL EXERCISE ON AUTOCAD FOR BUILDING AND MECHANICAL DRAWING
Computer aided drawing is a technique where engineering drawings are produced with the assistance of a computer and, as with manual drawing, is only the graphical means of representing a design. Computer aided design(CAD) however is a technique where the attributes of the computer and those of the designer are put together to solve a problem..
It is a drawing package used for graphic constructions and designs.There are two types of tool used in AutoCAD. These include draw tools and modify tools.
Draw Tools
Modify Tools
While working with AutoCAD, there are situations that require to use modify tools. As the name suggests, modify tools are used to modify existing lines and objects.
Using CADD for 2D objects
Two-dimensional(2D) computer drawing is the representation of an object in the single-view format which shows two of the three object dimensions or the muti view format where each view reveals two dimensions. In both cases, the database includes just two values for each represented coordinate of the object. It can also be a pictorial representation if the database contains X, Y coordinates only.
3D objects
Three-dimensional(3D) computer drawing is the coordinate format. Three dimensional computer aided drawing allows the production of geometric models of a component or product for spatial and visual analysis.
AutoCAD For Building And Mechanical drawing
The variety of drawings that are utilized in engineering are too numerous to illustrate individually here. A few examples from engineering disciplines will demonstrate the versatility of modern CAD systems.
Activity: Teacher guide students on how to use AutoCAD in
EVALUATION: 1. What is AutoCAD?
CLASSWORK: As in evaluation
CONCLUSION: The teacher commends the students positively