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Summary:

A family member asked me to make a custom part for a costume. The process was relatively easy, with one major snag.

Noisebridge Ultimaker
photo: Signe Brewster

We’ve all heard the “computer guy” cliché: One person has special computer knowledge, and suddenly they are asked to fix every single problem with their extended social circle’s computers.

Soon after I started tinkering with the Noisebridge Ultimaker, I sort of became that person, but for 3D printing. Luckily, no one I know has a 3D printer yet, so it’s more been people asking me to print them things. I don’t mind it. I like hearing the interesting applications people come up with (best so far: a cup-like instrument), and it’s great knowing more people are being exposed to the technology.

It also gives me a good excuse to practice making unexpected things. Recently, a family member made a special request for a District 12 badge for part of a “Hunger Games” costume. This was ahead of the debut of the latest movie in the trilogy, which came out today.

Just in case, I did a quick search on Thingiverse to make sure a 3D badge design did not already exist. It didn’t, which is unsurprising considering Hunger Games paraphernalia is likely protected.

Hunger Games District 12 badgeSo I would have to design the badge myself. I found plenty of 2D drawings of the badge online, which I wondered if I could turn into a 3D object and print.

Shapeways offers a very handy service where they can turn a 2D image–even a drawing–into a 3D print for you. But you can’t export the file after you go from 2D to 3D, which means you need to print through Shapeways or you are out of luck.

I read that 123D Design, a computer aided design program I have been working with, can turn an SVG vector file into a 3D shape. I used one of the many slightly shady sites available online to turn my JPG into an SVG and then loaded that into 123D.

It worked! The 2D image appeared. I used the “pull” tool to grab it and drag up its walls, turning it into a virtual 3D object

From the white space in the image, you can see that the black parts, which are what would be printed, aren’t all connected. So the badge needed to printed on a solid layer of plastic in order to stay together. I created two solid disks and slid them under the badge design to give it a solid bottom.

Made in 123D Design

Made in 123D Design

Then it was time to print. I loaded the file into Slic3r and then Pronterface. Slic3r noted I had some holes in my design, but it seemed like it had exported a file as usual, so I decided to go ahead and ignore the warning.

Hunger Games District 12 badge

Then something went wrong — it “finished” the print job after only completing the bottom solid layer. I couldn’t figure out what was wrong so I turned to a Noisebridger (did I mention it’s embarrassing to explain you are working on something Hunger Games-related to a full-blown hacker?). He took a look at the file and said I had some holes in the print, which prevented the printer from continuing. He fixed it up for me in a software program called Blender.

I started reprinting. It took a long time–nearly two hours–to finish because of the fine details. Here’s a video of the final touches being printed:

Note the stringiness within the open spaces. That’s a result of working with an older printer. You can clean it up with a little bit of nail polish remover.

Overall, it was a fairly simple process. The hole problem was troublesome though, as I would have failed on my own without help at that step. As I mentioned a couple weeks ago, this whole process is so reliant on software. I’m eager to learn it, but there’s a lot to know.

This print job also exposed a lot of legal gray areas with which 3D printing is dealing. It was easy for me to make my own replica of a District 12 badge. But that’s something I could also print on a 2D printer and glue onto a badge. Would the entertainment industry really care I went ahead and made it 3D?

  1. Jesus Balbastro Friday, November 22, 2013

    To (maybe) answer your legal question: that more than likely constitutes as fair use. You can also say it’s fan art. And since no one is making money from this no one is going to care either.

    Blender is a really great (free) program for making 3D things (to state it simply). I highly recommend it if you do 3D printing. Some people say it has a steep learning curve. My advice to avoid that as much as possible is to watch tutorials and read books. In fact you should watch a tutorial before you even download it * true story *

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    1. Thanks for the tip!

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  2. Hey! Great write up – how on earth did you import a SVG file into 123D? lol!

    I’ve been google-ing and reading as much as possible and cannot get my vectors in there. I’ve getting so close, but still can’t quite figure it out.

    Also – how did you create the circles underneath? Any tips on a tutorial to learn how to use the software with precision? Thanks a ton!!

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