Lesson Notes By Weeks and Term v4 - SHS 3

ENGINEERING MATERIALS, TOOLS AND MACHINES

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  2. Lesson Notes By Weeks and Term v4
  3. SHS 3
  4. ENGINEERING MATERIALS, TOOLS AND MACHINES

Subject: Applied Technology

Class: SHS 3

Term: 1st Term

Week: 9

Grade code: 3.2.1.LI.4

Strand code: 2

Sub-strand code: 1

Content standard code: 3.2.1.CS.1

Indicator code: 3.2.1.LI.4

Theme: METAL TECHNOLOGY

Subtheme: ENGINEERING MATERIALS, TOOLS AND MACHINES

Lesson Video

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Performance objectives

Lesson summary

Welcome, students. Today, we are moving into the future of manufacturing by looking at Computer Numerical Control (CNC) machines. In Ghana, as industries like Kantanka Automobile, construction, and modern furniture making grow, the need for precision, speed, and efficiency is paramount. Manual machines are excellent, but CNC technology allows us to produce complex parts with incredible accuracy over and over again. Understanding these machines will give you a significant advantage in the modern technical and engineering world. This lesson will focus specifically on two key CNC machines: the drilling machine and the grinding machine.

Lesson notes

A. What is CNC (Computer Numerical Control)?

Think of a manual drilling machine. You, the operator, have to manually turn handles to position the drill, pull a lever to lower it, and change the drill bit by hand. You use your eyes and measurement tools to ensure accuracy.

CNC automates this process. Computer: A dedicated computer is integrated into the machine. Numerical: You give the computer instructions in the form of numbers and codes (coordinates, speeds, feed rates). Control: The computer uses these numerical instructions to precisely control the machine's motors and movements.

In simple terms, CNC is the use of a computer to control machine tools. The set of instructions is called a program, often written in a language called G-code. B. The CNC Drilling Machine

Evaluation guide