A simple 3D printer made from LEGO Technic parts and MINDSTORMS EV3 motors and touch sensors combined with a low cost 3D pen. Follow me as I share many pictures, EV3 program and videos in hope to inspire you to make or recreate a similar MINDSTORMS 3D printer.
A bit of history:
Ever since i backed up the first 3Doodler kickstarted i've been wanting to make a LEGO MINDSTORMS 3D printer with it. it took almost a year after i got my 3D pen to actually get started on this project. Sadly the pen didn't work really well and so a brand less 3D pen was used instead. This turned out really good as it takes continuous feed 1.75mm ABS filament! This project uses this pen, some Sugru to hold it onto a LEGO Technic frame, other Technic parts and the LEGO MINDSTORMS EV3 as the electronic side of things. This 3D printer was finished just in time for the 2015 World Maker Faire where it was shown live for the first time at the LEGO MINDSTORMS booth.
Lets take a closer look.
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Step 1: All the main parts of the EV3Dprinter
I used a special Technic baseplate from minutebot.com but you can probably use a regular LEGO baseplate or design your own robot base. The idea is that you need something to stand the X,Y plates on, I used some old System Technic and some 1x8 plates allowing the platforms to glide as they are pushed or pulled by the LEGO Technic Linear Actuators.
Step 2: The X, Y, plateforms moved by LEGO Linear Actuator
Step 3: Here I attach the EV3 brick and the rack pilars on which the 3D pen will ride
Step 4: Next up is the 3D pen assembly
Hold pen in place with some sugru.com.
The pen shown here is from Banggood website which offer low cost and free shipping on many cool items.
Step 5: Insert the 3Dpen assembly into the rack pillar
And connect all the cables to the EV3
Step 6: Now we need to program the printer
For World Maker Faire, I had EV3Dprinter print out stars and polygons!
Program files screenshots coming up next
Step 7: Programming the EV3Dprinter
Math Engine / program core by Thomas Madeya (Germany)
Adaptation to EV3dPrinter by Marc-André Bazergui (Canada)
July/August 2015 made for World Maker Faire
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Step 8: Details of the math engine (Circle Myblock)
This is the part Thomas Madeya wrote for me. Once we have the Circle Myblock it is easy to change a few parameters to make any polygons, triangle or square.
To download full program (EV3 project file) see previous step.
>> screenshot added Oct 26, 2015