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.
- X axis – left to right
- Y axis – front to back
- Z axis – up and down
- 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|
|Phase:||2 – 2|
|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 .
Step (6) Attach the pen holder with bed
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
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
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
And if there is some problem in making a project, then you can message us, we will be happy to help you