3D printed Mini CNC Machine


Introduction to Mini CNC Machine

3D printed Mini CNC Machine is topic for today! Hi Friends Welcome to the DiY Projects Lab, I hope you all are well, so today we are going to learn how to make mini arduino cnc machine. It is a prototype module, but once you build it you will definitely be able to build a very large CNC machine and with much higher accuracy.

The principle will be the same, we will use DVD Writers Stepper Motors to control the movement of 3 axis of CNC machine.

  Step (1) What Is CNC ?

CNC (computer numerical control)  The system is based on the control of the movements of the work tool in relation to the coordinate axis of the machine, using a computer program benbox  executed by a computer.it is necessary to control the movements of the tool in two coordinate axis: the X axis for the longitudinal movements of the carriage and the Z axis for the transverse movements of the tower. servo motors are incorporated in the carriage and turret displacement mechanisms.

        AXis MOVEMENTS

  • X axis – left to right
  • Y axis – front to back
  • Z axis – up and down

       3 Axis

  • Automatic/interactive operation
  • Milling slots
  • Drilling holes
  • Cutting sharp edges

    What is  Stepper motor ?

The stepper motor is an electromechanical device that converts a series of electrical impulses into discrete angular displacements, which means that it is capable of advancing a series of step depending on its control inputs.   The stepper motor behaves in the same way as a digital-to-analog (D / A) converter and can be driven by pulses from logic systems. Its main applications include a variable frequency motor, brushless DC motor, servo motors and digitally controlled motors

Motor type: 2-phase 4-wire system
Step angel: 18°
Voltage: 5V
Resistance: 14Ω
Phase: 2 – 2
Drive mode: Bipolar

Max.starting frequency:

Max.slew speed: 1200pps
Holding torque: 40
Lead screw major diameter: Φ3
Lead screw lead pitch: 3
Size of motor outer diameter: 15mm

Material required for 3D printed Mini CNC Machine 

Arduino nano x1
CNC shield x1                                                                                                                                                                                A4988 Stepper motor Driver x2
Servo motor x1
pen x1old DVD Scrap X2                                                                                                                                                                Some wires                                                                                                                                                                                               

Step (3)    DVD drive stepper motor disassembly

First of all we must open the 2 DVD scrap to extract the motors and moving parts necessary for the CNC machine. We must open them carefully so as not to the  break the pieces we need.

In the following image we can see Image.   Simply by unscrewing the 4 screws marked in the image we can extract the part which we need, a whole shaft together with a stepper motor.

Step(4) Steppers preparation for 3D printed Mini CNC Machine

We have soldered the wire  with  stepper motor and then given it a spacer with a piece of wood. (As shown in the picture below)  we cut a wooden plate that will be our base.

   X-axis and Y-axis co-ordinates movement.

 I’ve attached the slider of X and Y-axis together in perpendicular to each other, using glue between them. And also attached a cut wood piece  above it as a working bed.

Step(5)     Assemble pen holder for 3D printed Mini CNC Machine

   I have used 3D printed pen holders. These are quite easy and fun.  In the pen holder, I used a spring and a small road (which is in the DVD scraps)  Along with this, there are servo motor attach .

(Download STL File)

Step (6) Attach the pen holder with bed



The Electronics

 CNC Shield v4                                                                                                                                                   

  This is the Shield CNC v4 for Arduino Nano, it is a 3 axis stepper motor controller, ideal for creating your own three axis CNC or laser engraving machine. This card can control two phase (4 wire) stepper motors up to 2A. It has a digital I / O interface, easy to connect to other modules, such as ENDSTOP, (Annytutorial) it also has an I2C interface, it can be connected to the I2C LCD or another I2C module. The power supply is 7.5-12Vdc, and the control logic is 5Vdc. This card is GRBL compatible.

BOTTOM VIEW of cnc shield

     TOP VIEW of cnc shield

Step(8)  Ready to your all circuit 

1) 2 PCs A4988 Stepper Motor Driver

2) v4 Expansion Board A4988 Driver

3)Arduino Nano


  First of all take hit sink and stick on A4988 motor Driver.

2 pcs A4988 Stepper motor driver connect on expansion board A4988 driver module. then connect the arduino nano with expansion board and connect all wiring


step(9) Connect pen with holder

Add pen with Holder

Step(10) Benbox Software 

Benbox Softwer Configuration

Software and Lasering for CNC

1st Download Benbox Software From this ( Link )

If you want to download the hard driver, Click here.”



Open the Benbox software anf upload firmware Hexfile  then note the value as show an picture


(1.) plug the cnc in

(2.) go into the blue menu in the software and press connect (labeled in picture 1)

(3.) find an image you want to line , open it (labeled in picture 1)

(4.) press play

3D printed Mini CNC Machine working video tutorial

I hope you liked it, if yes please subscribe to my Youtube channel  

And if there is some problem in making a project, then you can message us, we will be happy to help you

thank You


About Author


    • Hello, I hope you’r fine. Your question is that where is the Arduino code, then we can tell you that we are using the CNC shield or driver in it, so we do not need the code in it, we control it with the help of a software(BENBOX). thanks again

  1. Pingback: Arduino LED cube 8x8x8 - Make LED cube using Arduino nano

Leave A Reply