DIY Arduino Controlled Egg-Bot




Introduction: DIY Arduino Controlled Egg-Bot

Hi, my name is Nikodem Bartnik. I live in Poland, I'm 18 years old. I like to program and create ...

In this instructables I will show you how to make your own Egg-Bot controlled with Arduino. I wanted to make it before but I thought it is too hard for me but I was wrong. It's easy to build so for sure everyone can do it.

Step 1: Parts

Below I add list of parts:

- stepper motor with 200 steps per revolution (x2) I use 12V and 0,33A but you can use other.

- stepper motor driver A4988 (x2)

- arduino or atmega328

- power supply for stepper (I have 12V and 2A)

- micro servo

- plastic plate, wood

- 40cm screws x3 and 12 nuts for it's

- two lego wheels

- markers in different colors

- drill, knife, saw, screwdriver, double sided tape, wood glue, wire, soldering iron, rubber bands

- everything you need to make PCB link.

Step 2: Connection

Connect it like on fritzing image above or go to the next step and make PCB (printable circuit board). And you must find right settings for potentiometer on stepper motors controller. With this potentiometer you can control voltage that goes to stepper motors. Try to set it that the stepper move is as smooth as it possible.

Step 3: PCB (optional)

Why I made PCB? Look at the image above, it shows how it looks on breadboard. Too many wires. You can easily connect something wrong or something can disconnect itself and you can spoil e.g: stepper motor driver. And on PCB everything looks better, take less place and is reliable in combined. You can read about how to make PCB here. Below I added PDF file with PCB layout. For more info see arduino on breadboard.

Step 4: Frame

The frame is made with plastic and some wood. You can see dimensions in sketchup below or in next step.

Step 5: Cutting of the Frame

Cut two elements from second picture and one from the third picture. Dimensions are shown in the pictures.

Step 6: Smoothing the Edge

Smooth the edges with sandpaper to make them look better.

Step 7: Drilling Holes

Drill holes like on image above. You need to make it very precisely. In the 3 holes at the corners put pieces of aluminum tube.

Step 8: Pen Arm

Pen arm is made with wood and plastic. At the end of the arm I made 9mm hole for marker

Step 9: Connection Frame

I hope you understand how to connect all of parts of frame with this photo if you have problems with it, write a comment I will try to help. Everything is connected with screws, double sided tape, glue and wires.

Step 10: Code for Arduino

Download code for arduino from here. And you need to change few lines:

This:<br>#define YAXIS_DIR_PIN 14<br>#define YAXIS_STEP_PIN 15<br><br><br>To this:<br>#define YAXIS_DIR_PIN 10<br>#define YAXIS_STEP_PIN 11<br>


This:<br>#define XAXIS_DIR_PIN 10 <br>#define XAXIS_STEP_PIN 8<br><br>To this:<br>#define XAXIS_DIR_PIN 7<br>#define XAXIS_STEP_PIN 8<br>


This:<br>#define SERVO_PIN 13<br><br>To:<br>#define SERVO_PIN 9

Step 11: Software for Computer

I propose to install original eggbot extension to inkscape because with it you can print filled object. You can read how to download it and how to use here. To make G-code files in inkscape download this extension made by martymcguire. And the last thing to download is a program to sending commands over serial to arduino. Download it here. Now you need to change unicorn extension code. Go to:

C:\program files\inkscape\share\extensions\unicorn\

Add to 29 line this:

<p>"M300 S%0.2F (pen up)" % self.pen_up_angle,</p>

And delete line 39:

<p>"M300 S255 (turn off servo)",</p>

Step 12: First Painting

This are first eggs that I painted by my eggbot. Effect is no the best because of pen vibration. I all the time try to fix it but I can't do it succesfully yet. Picture on the orange egg is supposed to represent a bear.

Please, if you like my project vote for me. Thanks!!!!

Thanks for reading and sorry for my English :)
Have fun with your EggBot.

Egg Challenge

Runner Up in the
Egg Challenge

Automation Contest

Third Prize in the
Automation Contest



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      Metalworking Contest
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      Fix It! Contest

    48 Discussions

    Hi, first of all, this is a excellente proyect my friend. Im doing it right now but I have a few problems. You'll see, when I open the software to send the Gcode, the motors doesn't move and I have conected everything according the diagram. pleeease help.

    Hi, first of all, this is a excellente proyect my friend. Im doing it right now but I have a few problems. You'll see, when I open the software to send the Gcode, the motors doesn't move and I have conected everything according the diagram. pleeease help.

    DIY ARDUINO CONTROLLED EGG-BOT. you can help with your work.

    Very good, Excelence my friend but why not use GRBL,just replace the servo with a small stepper and put a cam on the shaft,then up and down are just a number of steps in forward and reverse direction

    this project used A4988 stepper drivers, but i have easystepper driver, this is MS1 and MS" but what have MS3 need this ? i thin kuse easytepper drivers but no sure how connect, step and dir have ok, but MS1,2,3 pins ??? can i use inly my driver MS1 and 2 to high, 5volt. ?

    hello, i has try found more info this, i has printed eggbot frame parts but i no found anywere info how long M8 rod need be at bot, size ?

    Hi bro, I see this failure when I click Apply on eggbot control (Inkcapse). Please help me to solve it!


    The first time I have got amazing thing like . Thank you very much :)

    Belo projeto. Estou fazendo a minha impressora de ovo, mais estou com dificuldades no funcionamento. Já baixei o Inkscape, a extensão do Egg Bot. Agora não consigo configurar e testar. Poderia inserir outro Instructable descrevendo a configuração e o funcionamento. Parabéns pelo trabalho, espero que me ajude.

    For a instructable i missed some inforation about the Axis.
    How to build this exenter in that way so that's the angle matches the way.So that the whole surface of the egg is reacheble.
    Masure values would useful.
    I got no idea,how long i.e. the slot must be.
    Hope you have a few pic's on backside stepper mechanic
    Anyway that's a funny thing

    i already build this instructable until stuck in coding for arduino, i confuse which file that copy to arduino IDE. could you give me step by step how to insert code and getting started with inkscape for eggbot. please help... :-(

    awesome stuff.

    can you give me tutorial how to upload code from github file to UNO please? i'm newbie , sorry.

    hi! its awesome but i have not got a stepper motor can i use continues servo motor

    and how to code it can you please help me

    1 reply


    Servos have 360 steps per revolution, steppers (with microstepping) have 3200 steps per revolution. So it can be to less to getting good print quality.

    Try to find steppers in old printer or buy it. It isn't expensive now (in Poland) I can get one for $12.5.

    hi! Can you give me a hand with the code??

    I'd like to understand it better, please!!

    Brawo! Dobra robota.

    Jeśli potrzebujesz bardziej profesjonalnego przycięcia materiałów (CNC) napisz, zrobię to dla Ciebie za darmo.

    Bravo, good job

    If You want professionally cutted elements (CNC) just write me. I make it for You for free.

    tomekltek at

    1 reply


    Wielkie dzięki.

    Dzięki za propozycję ale udało mi się wyciąć wszystko ręcznie i działa całkiem dobrze więc nie będę już zmieniał. Ale dzięki za propozycję raz jeszcze.



    Thanks for proposition but I already cut all things by hand and it works pretty well so I won't change it. But thanks for proposition again.