Building a Drawbot With LEGO

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Introduction: Building a Drawbot With LEGO

This is a very simple drawbot I've built with our Lego Mindstorms set.

It's quick to build and program and once you've got it up and running you'll be printing one page after the other with it.

Step 1: Make a Detailed Construction Plan

Just kidding, this is my sketch I made at work.

Step 2: Building the Gears

At first I didn't build a gearbox. It worked, but the pen was flying over the page. I have the smallest gear directly on the motor and the largest connected to the small one. That makes it a lot slower and gives the pen time to leave a trail on the paper.

Step 3: The Pen Holder

As you can see it's just a rubber band holding the pen. Makes it easy to change the pens.

Step 4: Program It

I know the screenshot is a little blurry. But there is not a whole lot to do. Just let the two motors rotate.

Just make sure that both motors are NOT turning at the same speed. Otherwise they will draw a nice shape but will keep on repeating it over and over.

Step 5: Let It Draw

Place a sheet of paper under the pen, start the program and watch in awe. ;)

There are three things you can do to alter the shape of the drawings.

  1. Change the ROTATION SPEED in the program.
    Changing one of them will be enough
  2. Move the rotation-point at the motor (rotator).
  3. Move the rotation-Point on one of the axis

Step 6: More Videos

A general overview how the drawbot works and where and what to change to get different shapes

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    15 Discussions

    0
    rayaplin
    rayaplin

    Reply 3 years ago

    how do you build a drawbot with LEGO

    0
    rayaplin
    rayaplin

    3 years ago

    thanks.

    0
    mslab6
    mslab6

    4 years ago

    How can I build one of these? Do I just look at the pictures? Is it possible for you to give me worded instructions with pictures? Thank you!

    0
    krummrey
    krummrey

    Reply 4 years ago

    Yes, it's a freestyle project. Will work even if you're off by a notch or two...

    0
    Verticees
    Verticees

    6 years ago on Introduction

    Fantastic project! I was wondering: I noticed that your pen often got caught on the paper while drawing. If you were to make the pen holder at an angle, would it become more stable during the drawing process?

    0
    krummrey
    krummrey

    Reply 6 years ago on Introduction

    Hi innovator007, thanks for your hint. I think it is the gears from lego that have a little leave and that makes it wobble. Building it stiffer probably resolves that. having it at an angle probably too, have to try it sometimes.

    0
    Verticees
    Verticees

    Reply 6 years ago on Introduction

    Good point. I plan on making this sometime soon, so I'll try building it stiffer and holding the pen at an angle. I also plan on using a ballpoint pen for fun. Thanks!

    0
    alienate
    alienate

    6 years ago on Introduction

    This is great, I wonder if it could be made to move for larger drawings?

    0
    krummrey
    krummrey

    6 years ago on Introduction

    Here's one, that someone built. A lot sturdier, but the idea is the same:

    0
    krummrey
    krummrey

    Reply 6 years ago on Introduction

    HEY, this instructable won the second prize in the makerfamily contest.
    Thank you all!!

    0
    someone_678
    someone_678

    6 years ago

    How do u make

    0
    krummrey
    krummrey

    Reply 6 years ago on Introduction

    Where exactly are you having problems building one?