Pen Plotter ESP32

Courtesy of Maker101 on YouTube. Here is a simple breakdown of 3d part assembly.

The main 3d parts for the pen plotter are the same as this project, as well as the motors and motor controllers. This makes for a nice assembly guide, but the glued part can also be screwed into place as well.

Here is a gif of the pen plotter in action. It is not very quick, but is working well.

The electronic parts for this project are fairly inexpensive. We sourced parts from amazon but they are widely available elsewhere. 

• ESP32 38-Pin
• ESP32 Dev Board
• ULN2003 Stepper Motor Drive Module
• 28BYJ-48 DC 5V Stepper Motor
• M3 Screw Kit
• Dupont Wires Female-Female

The stepper motors and drivers were purchased in a six pack combo with the motors and drivers. The project only needs 3 motor/drivers but having the extras is not a bad idea. The cheap drivers are meant to have reverse polarity protection, but in my experience it does not work, oops.

The ESP32 linked above is a 5 pack, you obviously only need one but if you are looking for a good deal the multi-packs are best.

You can use a number of different dev boards, but the 3d printed holder for the PCBs and the writeup for wiring is setup for the linked board. So long as there are three 5v connections available on the board, or you are willing to splice the 5v power form the three driver boards together, than you can use anything compatible with the ESP32.

For the M3 Screws you only need 12 M3x4mm, and 2 M3x12. We purchased a large kit so we could have options and use them with other projects. Plus you have alternate sizes if needed. The larger pen holder does need an M4 screw but you only need that if you want to use larger markers.

For the Dupont Wires you will need 18 female to female wires. We found the 20 cm length to fit nicely.