Design of a Keypad Operated CNC Drilling Router

Akinnuli, Olufemi B. and Balogun, Vincent A. and Akintayo, Tunde C. Design of a Keypad Operated CNC Drilling Router. International Journal of Engineering Research and General Science. ISSN 2091 - 2730

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Abstract

The CNC router can be adapted for drilling and engraving operations base d on the imagination and creative skills of the operator. A CNC router consists of three main parts: a mechanical setup that can move in X, Y and Z directions, a driving cir cuitry which includes the stepper motor and a software program that controls the op eration of the system. Although, CNC router is commonly and commercially available, the emphasis is to increase the understanding and encourage developing countries like Ni geria on the developmental process of the CNC router machine. This work presents the development of a CNC drilling router machine using a keypad with the aid of Autodesk 3D Max and Proteus 8 software. The CNC router has a liquid crystal display (LCD) which is l inked to the microcontroller. The program of instructions is written in C progr am compiler. The column strength of the X, Y, and Z axis of the machine were evaluated to be 508.86N, 1142.5N and 7872.64N respectively while the critical speeds of the various axes wer e determined to be 3222, 7234.14 and 49847.78 RPM respectively. The for ces due to the guide rails were evaluated to be 890 N on both the Y and Z axes. This gave a force moment along these axes to be 400.5 and 10.1 kNmm respectively. The stepper motor utilize d for the machine has a 1440 steps/ rev, 500 RPM with 1/8 micro - stepp ing with a phase current of 3.5A and voltage of 2.45V. It is anticipated that the developed machine is able to drill plastics and soft wood materials. The development strategy will aid t he CNC router design concept within the developing economy as Nigeria .

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