Overview

The Drawbot is a drawing art robot that can draw. You will needs two stepper motors, a micro servo motor to lift the pen. And of course, you’re going to need the electronic bits to drive it all.

The firmware Drawbot is based on the cool Grbl_Esp32 project of bdring

This project was done for being a good introduction to CNC machines because you can clearly see and learn all the firmware and hardware concepts that involves them in a fun way. 

Parts List

Part List of ESP32 Drawing Robot Shield:

- 1 x PCB ESP32 Drawing Robot Shield

- 1x ESP32 DEVKIT V1 board

- 2x Driver Stepper Motor A4988

- 2x Micro-SD Adapter module

- 1x LED 3mm

- 1x V-Regulator 5V AMS1117 (SMD)

- 1x Resistor 10K Ohm

- 1x Capacitor 0.1uF

- 2x Capacitor 100uF/16V

- 1x Capacitor 1000uF/16V

- 1x DPDT Lock Switch 8.5x8.5mm

- 1x Barel Socket DC

- 2x Female Header 15 pin

- 4x Female Header 8 pin

- 2x Male Header 4 pin

- 1x Male Header 3 pin

- 2x Male Header 2 pin

You can download design file Drawbot frame for 3D printed part here thingiverse.com/thing:2349232

Part List of Eggbot:

- 1x Controller ESP32 + A4988 + Shield Drawbot

- 2x Stepper Motor Nema17

- 1x Servo MG90

- 1x MicroSD 8GB

- 2x micro Limit switch + cable X & Y

- 5x Bearing

- 8x Sliding Bearing 8mm

- 1x GT2 Belt 2Meter

- 1x Power supply 3A 8V

- 1x Frame Set Acrylic Hitam

- 4x Stainless Shaft diameter 8mm

- 1x Stainless Shaft M8

- 2 x Stainless Shaft diameter 3mm

- 1x Set Support 3D Printed part

- Set Baud and Nut M2, M3, M4, M8

- 1x Marker/Pen

Circuit Diagram

PCB (PCBWay)

This article is proudly sponsored by PCBWAY.

To make this project you need to order a prototype PCB on PCBWAY. How to order is very easy and you will get 10 Pcs PCB for $5 with very great PCB quality.

Soldering SMD

This shield has one SMD component, it is not too difficult to solder because the size of the SMD component is quite large, so don't worry. You will need tweezers as a tool to hold the components when soldered.

Soldering MicroSD Module

Solder 8 pin male header to microSD adapter module.

Remove plastic holder use pliers

Attach microSD adapter with male header soldered to PCB.

Solder pins male header on the back of PCB.

Cut the long legs male header.

Soldering Components

After finish solder SMD component and microSD adapter, next attach other trough hole components on the PCB following the pictures and symbols on the PCB.

Solder all the component legs on the back of the PCB.

Cut all the long legs of the component wire.

Attach Modules

Attach the ESP32 board and two Driver Stepper Motor A4988 into the female header socket as shown, look at the pin name dont get the wrong orientation.