Archive for June 20th, 2011

Senior Developer Needed!

MakerBot Industries is hiring! We’re looking for smart, driven developers to help us build the software that will define 3D printing for thousands of users. Candidates should be independent workers with strong software design sense. You’ll form the kernel around which we’re building our software shop; good team leadership skills are key.

Requirements:

  • Strong C/C++ skills
  • Experience working with small, nimble teams
  • Good understanding of 3D geometry
  • Ability to quickly grasp new ideas and technologies

Desirable skills:

  • Embedded platform development (AVR, ARM)
  • Qt (on the desktop)
  • OpenGL programming
  • Git/Github
  • Python
  • Understanding of open source and the OS community

This position is located in Brooklyn, NY. To apply, fill out the online application, and be sure to upload your resume. We look forward to hearing from you!

About Us
MakerBot Industries is a rapidly growing, Brooklyn-based startup that designs and manufactures low cost 3D printers. We make machines that make things! We’re deeply committed to open source hardware and software, and have the goal of getting these incredible tools into the hands of makers, inventors, and ordinary people around the world.

How to Apply
Visit our Online Application to apply!

 

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3D Printer Key Duplication with nrp

Duplicating Disc Detainer Keys by nrp

Duplicating Disc Detainer Keys by nrp

Thingiverse user nrp has been working on using his 3D RepRap printer in some pretty amazing ways.  He’s already put his 3D printer to use along with a Kinect to print by use of hand gestures.  Since then he’s been working on duplicating house keys and the more secure disc detainer keys pictured above.  Nrp’s website, and the comments that go along with his detailed posts, provide a wealth of information about his project along with lots of interesting links about computer enhanced key generation.

This project and the way nrp uses his printer remind me of the very cool Nickel for Scale project by Amy Hurst and MakerBot’s own Marty McGuire.  How cool would it be to never have to go get keys made again?  I don’t think it’s too much to dream that one day you might be able to put a key down next to a nickel, take a picture or short video, and have your MakerBot crunch out a few duplicates.

Full writeup on my blog at: eclecti.cc/hardware/physical-keygen-duplicating-house-keys-on-a-3d-printer It occurred to me recently that I had printed almost nothing actually useful on my RepRap 3D printer, aside from parts to improve on or build more RepRaps. I am rectifying that with this project. The goal here is to generate working house keys by inputing the key code of the lock into a parametric OpenSCAD model. Instead of having to explain to my landlord how I ended up with a wedge of plastic jammed in my front door, I ordered a box of (well) used locks and latches from eBay to experiment on. Luckily, the lot includes both Kwikset KW1 and Schlage SC1 locks, which are the two most commonly found in the US. I created an SC1 model to start with, but I’ll probably make a KW1 soon. EDIT: I uploaded a KW1 model as well. Designing the key model was actually pretty straightforward. I measured a key with a ruler and calipers and created an approximate model of it that is reasonably easy to print. I then got pin depth specifications and parametrically differenced them out of the model. To generate new keys, you can just edit the last line of the file and enter in the key code for your key. If the code isn’t written on the key, you can measure the height of each bit and compare to the numbers in the Root Depth column on the aforementioned pin depth site. Perhaps more nefariously, you could implement something like SNEAKEY to generate key codes without physically measuring the key.
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Writeup containing actual links at eclecti.cc/hardware/physical-keygen-now-for-disc-detainer-locks The Physical Keygen post got some interesting reactions, but there was a common claim among many of them that it was just a gimmick because there are more practical ways of getting past basic Schlage and Kwikset pin tumbler locks. I agree with that, and I’ll also admit that a fair number of my projects are gimmicks, or as a stretch, art. Schuyler Towne of Open Locksport saw past the gimmick (or art) and into the possibility of printing keys for more interesting locks. He stopped by recently with a collection of said locks, and over the period of a few hours we found that keys for disc detainer locks were printable and created a nearly working ABUS Plus key. He left me a cutaway lock, and over the next week, I refined the model to the point of working straight off of the printer. Despite being a higher security lock than the SC1 or KW1 pin tumblers I was working with before, the key is much easier to print accurately. The OpenSCAD model is linked below, and like the last files, you simply edit the last line to match the code for your key. The ABUS Plus and other disc detainer locks are much more common in Europe than the US, but we do have a pretty ubiquitous example around here. After the Bic Pen debacle in 2004, Kryptonite switched their bicycle U-locks from tubular to disc detainer. I designed a model off of the key from the Kryptonite Evolution I have, but as of yet, I have not successfully opened the lock with it. The key is smaller and thinner than the ABUS Plus, causing it to flex too much to effectively turn the last few discs. I’ve posted the file anyway, in case someone has stronger plastic or an idea to strengthen the model. EDIT: The Kryptonite key works. I tightened my X and Y belts and printed it a bit slower. Apparently some of the blobbing on the corners before was catching on disks.
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Candlemaking molds with a MakerBot

Candle of Android's Mascot by mah_digilife

Candle of Android's Mascot by mah_digilife

When I saw the above image I first thought, “Gah!  Have we learned nothing from the flaming bunnies!”  After reading the entire description, I was greatly relieved and excited to see mah_digilife was using their MakerBot for printing molds, not candles.   His description, list of materials, instructions, and numerous pictures should be enough to help anyone get started in candle making.  These directions could probably be used to help make molds for candles, soap, and probably even little silicone objects as well.  What a great new use for a 3D printer!

Derivative of thingiverse.com/thing:7188 . I made the candle from the mascot of android's print. It might be good for the candle making?
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MakerBot Dads!

Here’s a great video of Schuyler and his dad at Maker Faire! Got a story to relate about using a MakerBot with your kids or parents? We’d love to hear those stories! Drop us a note!

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