DEVELOPMENT OF MINI CNC DRILLING MACHINE

ATTENTION:

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INFORMATION:

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DEVELOPMENT OF MINI CNC DRILLING MACHINE

CHAPTER ONE

INTRODUCTION

1.1 Background of the study

CNC milling is a specific form of Computer Numerical Controlled (CNC) machining. Milling itself is a machining process similar to both drilling and cutting, and able to achieve many of the operations performed by cutting and drilling machines. CNC machining centers are used to produce a wide range of components, and tooling costs involved have continued to become more affordable. In general, large production run requiring relatively simple designs are better served by other methods, although CNC machining can now accommodate a wide range of manufacturing needs. CNC milling centers are ideal solutions to everything ranging from prototyping and short-run production of complex parts to the fabrication of unique precision of components.

In this work, a low-cost, desktop prototype 3-axis vertical CNC mill is developed for purposes of student experiments in CAD/CAM and CNC programming areas. Open source microcontroller platform Arduino is used for control of the motors, and open source software is used for executing the G code and M code for machining applications.

1.2 OBJECTIVE

The objective of the project,

• The idea behind fabrication of low cost CNC milling machine is to full fill the demand of CNC milling machine from small scale to large scale industries with optimized low cost.

• Low cost

• Smaller size

• Easily operable

• Easy interface

• Flexible

• Low power consumption.

1.3 METHODOLOGY

The start of the flow work is to understand the fundamental of the Mini CNC machine. After doing some research and study about the Mini CNC machine, the next step that is needed to do is design the machine according to the understanding of the mini CNC machine concept. The designing of the machine including with the wiring connection and the software that is use to generate the program. Develop the machine base of the design that has been drawn.

MATERIALS USED

• Aluminium

• Stainless Steel

• Phosphor bronze

• Acrylic

1.5 DESCRIPTION OF COMPONENTS

A Limit Switch is the simplest type of end stop a simple mechanical switch positioned to trigger when a axis reaches the end of its motion. Limit switches are used to protect the stepper motor and circuit by shutting the motors by triggering the switch when the axis reaches its end. The signal pins from limit switches are connected to the microcontroller board to sense the axes ends.

1.6 MACHINE ASSEMBLY

STEPS FOR CNC MILLING PROGRAMMING AND MACHINING

The following is the procedure to be followed in CNC programming and machining. The most important is to verify the programme by test run it on the machine before the actual machining in order to ensure that the programme is free of mistakes.

• Study the part drawing carefully.

• Unless the drawing dimensions are CNC adapted, select a suitable programme zero point on the work piece. The tool will be adjusted to this zero point during the machine setup.

• Determine the machining operations and their sequence.

• Determine the method of work clamping (vice, rotary table, fixtures etc).

• Select cutting tools and determine spindle speeds and feeds.

• Write programme (translate machining steps into programme blocks). If many solutions are possible, try the simplest solution first. It is usually longer, but better to proceed in this way.

• Prepare tool chart or diagram, measure tool geometry (lengths, radii) and note.

• Clamp work piece and set up machine.

• Enter compensation value if necessary.

• Check the test programme. It is a good practice to dry run the programme

a. Without the work piece.

b. Without the cutting tools, or

c. By raising the tool to a safe height.

It is necessary to correct and edit programme and check again.

• Start machining.

1.7 SCOPE OF WORK

• It is planned to scale up the prototype CNC machine in terms of size, use more powerful motors, strengthen the frame and worktable with materials like aluminum or cast iron, and augment the CNC control software with software for simulation ahead of actual run.

• Machines in general and robots in particular, are appealing to youth and children. Therefore, exposure to and experience with DIY robots and mechatronic system projects can render engineering education innovative through playful learning.

• In some industrialized countries, school children are exposed to CNC programming and machining as early as middle school. Therefore, with the power of the Internet, it is also planned to introduce neighborhood school children remotely to Web-based real-time operation of CNC machines, while imparting them basic knowledge of computer-aided art, design, and modeling through open source software such as Google SketchUp

HOW TO RECEIVE PROJECT MATERIAL(S)

After paying the appropriate amount (#5,000) into our bank Account below, send the following information to

08068231953 or 08168759420

(1) Your project topics

(2) Email Address

(3) Payment Name

(4) Teller Number

We will send your material(s) after we receive bank alert

BANK ACCOUNTS

Account Name: AMUTAH DANIEL CHUKWUDI

Account Number: 0046579864

Bank: GTBank.