Skip to main content

From Photo to Inkscape to DXF to OpenSCAD to MakerBot to Costume Jewelry

There is a similar tutorial to this one that uses Adobe Illustrator. However, Inkscape is a great, free, opensource vector graphics editor. Yesterday I learned how to use it to go from a photo to a 2D drawing and from that to a 3D extruded version of that drawing and finally to a real live object.

Laura is going as Rachel from Glee this year for Halloween. To complete the outfit, she wanted a "Finn" necklace like the one Rachel is apparently wearing this season


I opened the picture of the necklace in Inkscape, traced it with the Bezier curve tool, cleaned it up a bit, then selected and deleted the image I traced over. The next step was exporting a DXF.

The DXFs exported by Inkscape don't seem to work with OpenSCAD. Instead, I had to install an extension called Better Better DXF Output. Download the zip and extract it into the extensions folder for Inkscape. On Ubuntu Lucid, the extension should be extracted to /usr/share/inkscape/extensions.

Naturally, the fun didn't stop there. After installing the extension on Ubuntu Lucid, it started raising Python exceptions. To make it work, you'll need to replace xpath(path, inkex.NSS) with xpath(path, namespaces=inkex.NSS) in b2_dxf_outlines.py. Finally, by selecting Save As > Format > Better Better DXF, I was able to export a DXF that worked with OpenSCAD.

In OpenSCAD, the code is pretty simple. Unfortunately, the extruded DXF doesn't show up in the center. I had to zoom out and orbit around a bit to find it. Then I added a translate to move it to the center:
translate([-25, 270, 0]) {
  dxf_linear_extrude(file="finn.dxf", height=3, convexity=1, center=true);
}
To finish up, just click Design > Compile and Render followed by Design > Export as STL.

Finally, I printed it up. Since I have a heated build platform, the bottom of my prints have a smooth, glossy finish. So, I mirrored the text in ReplicatorG (Mirror > Reflect in Y) to make the front of the necklace glossy. We don't have any gold paint yet, so here's the almost-final product:


All of the files are available on Thingiverse.

Popular posts from this blog

Email Injection

Not so long ago, I ran a wiki called SecurePHP. On that wiki, there was one particular article about email injection that received a lot of attention. Naturally, with all the attention came lots of spam. As a result, I disabled editing of the wiki and content stagnated. Still, the email injection article remained popular. About a year later, the server that hosted SecurePHP died and I never had a chance to hook it all back up. I saved the article though and I'm reposting it now. It may be a bit old (I've been away from PHP for a long time), and I didn't write all of it, so feel free to leave comments about needed updates and corrections. Though this article focuses on PHP, it provides a lot of general information regarding email injection attacks. The PHP mail() Function There are a lot of ways to send anonymous emails, some use it to mass mail, some use it to spoof identity, and some (a few) use it to send email anonymously. Usually a web mailform using the mail() funct
Read more

Bot Commander r1 Released

I just published Bot Commander , the code for my Lego NXT rover . There's a lot left to be done, but release early and often, right? Currently it provides a UI for controlling the direction and speed of all three motor ports on the NXT brick. You can link motors together to adjust their speed in unison. In addition, you can enable "Tilt Control" for a steering-wheel-type experience. To use tilt control: Hook up motor A and B to be the left and right wheels of your vehicle. Hold the phone sideways (i.e. landscape). Tilt the phone forward and backward to drive forward and backward. Turn the phone right and left (like a steering wheel) to steer right and left. As you tilt the phone, you'll see the UI update the slider controls for the speed of motors A and B. I plan to expand the UI to provide a lot more than just motor control. Before that, though, I'll push a JAR to make it easy to integrate control of Lego NXT robots into your own Android project. The code
Read more

Android Recipes and Snippets

I've put together a small collection of Android recipes. For each of these recipes, this is an instance of Context (more specifically, Activity or Service ) unless otherwise noted. Enjoy :) Intents One of the coolest things about Android is Intents . The two most common uses of Intents are starting an Activity (open an email, contact, etc.) and starting an Activity for a result (scan a barcode, take a picture to attach to an email, etc.). Intents are specified primarily using action strings and URIs. Here are some things you can do with the android.intent.action.VIEW action and startActivity() . Intent intent = new Intent(Intent.ACTION_VIEW); // Choose a value for uri from the following. // Search Google Maps: geo:0,0?q=query // Show contacts: content://contacts/people // Show a URL: http://www.google.com intent.setData(Uri.parse(uri)); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(intent); Other useful action/URI pairs include: Intent.ACTION_DIAL , tel://867530
Read more