QU-BD Combo CNC Mill And 3D Printer Pre-Order Interview

I’ve been saying for a while that there’s nothing inherently expensive about 3D printing technology…at least not the FFF type. Assuming the technology becomes more popular over the next few years (which I do) I don’t see any reason why 3D printers couldn’t become as cheap and ubiquitous as 2D printers.

However, 3D printing has weaknesses, not the least of which is that it can’t work in metal.* You can take the plastic parts and cast metal parts from them, but the heat and gases have side effects that nobody in their right mind would ever allow inside a house. It is possible to work metal by machining it in a small CNC mill, as demonstrated by the ease of finding a desktop mill on Google. Since 3D printers and CNC mills function so similarly, why not combine both functions into one machine?

QU-BD is working on that. Openalia interviewed them back when they were coming off of a successful effort to Kickstarter their own thermoplastic extruder. Now they’ve arrived at the main event, the beta Rapid Prototyping Mill (RPM) pre-order. This design is important because it has the potential to create all of the (non-electrical) parts for a 3D printer, including its own extruder. Read through the interview with Chelsea Thompson after the jump to learn a little bit about the RPM and the Revolution, which is an all-metal frame 3D printer.

* I’m limiting the analysis to current technology. Sure, there might be an unforeseen breakthrough in materials science in the near future, but that’s a different discussion.

Ford Officially Backing Open Source 3D Printers

In a press release Ford Motor Company bragged about using 3D printing in general, and the open source Makerbot Thing-O-Matic in particular, to develop some of the smaller plastic parts for its vehicles. Zack Nelson, the engineer in the video, lists the easy availability of design files and community support as benefits to using the open source machine.

The full text of the press release is after the jump.

Defense Distributed Had Their Stratasys 3D Printer Taken Away

Defense Distributed, headed by Cody Wilson, is championing the Wiki Weapon project, the aim of which is to produce files for a 3D printable gun.

Unfortunately for them, when Stratasys found out what they were doing the 3D printer they had leased got repossessed.  Stratasys said that a plastic gun runs afoul of the 1988 Undetectable Firearms Act which bans guns that can pass through a metal detector without setting it off (according to Wired Danger Room). WikiWep posted the letter from Stratasys on their blog…along with a weak attempt to spin the situation. This is also following the attempt to raise money on indiegogo, which was ended by indiegogo after they found out what Wilson was doing.

According to Wired…

Wilson visited the ATF field office in Austin…he added that the ATF believes he’s not broken any laws, and that the agency believes 3-D printed guns fall into a regulatory gray area…

Wilson says he’s consulted with a lawyer, and is considering acquiring a federal firearms manufacturing license, a process that could take at least two months at the earliest. He’s also thought it may be necessary to incorporate Defense Distributed, turning it into a company instead of a decentralized internet collective.

Wilson says. “It’s just disgusting. I hate that that’s the way it is, but that’s apparently the regulatory landscape.”

Wilson says his group is looking at building an electricity-fired 3D-printed test chamber that can be used to test pressure and the interaction between heat given off by bullets with thermoplastic, which could cause the gun to melt. The chamber wouldn’t have a trigger, Wilson says, who also plans to send the schematics to the ATF for approval while waiting for a manufacturing license.

Wired Danger Room also produced an interesting follow up to this story in which they dive into Stratasys’ relationship with existing weapons manufacturers. It turns out the company’s 3D printers are very popular with companies like Remington because, surprise surprise, they use them to rapidly prototype new guns. There is an exception in the Undetectable Firearms Act for plastic guns as long as they are prototypes made by licensed manufacturers.

I’ll wrap this up with the words of 3D Systems Corporations, CEO, Abe Reichental…

Keeping 3D printing positive, allowing it to continue to make good requires decisive action – industry wide action.

With that in mind, I call on our capable and responsible industry leaders to join me in making 3D printing good and the community safe. Without taking a position on gun control laws, our responsibility is to be lawful.

We should join together so parents don’t have to worry their child might print something illegally and communities don’t have to worry that someone irresponsible will open fire with a printed weapon and companies don’t have to worry about counterfeiting and piracy.

References and additional links

• Robert Beckhusen. 1OCT2012. 3D printer company seizes machine from desktop gunsmith. Wired Danger Room
• Robert Beckhusen. 3OCT2012. 3D printer company sells to gun companies, but not desktop weaponeers. Wire Danger Room
• Stephen Holmes. 3OCT2012. Wiki weapons shot down by Stratasys – but that’s not the end of the battle. Develop 3D
• Will Oremus. 2OCT2012. Designer of 3D printable gun has his 3D printer seized. Slate
• BBC. 3OCT2012. Plans to print a gun halted as 3D printer is seized. BBC News, Technology

3D Printing Doesn’t Produce Toxic Fumes

It’s reasonable to wonder if heating up plastic until it melts releases fumes that aren’t safe to be around.

Taulman designed the 2BEIGH3, a 3D printer that converts into a 2D CNC machine. Part of his work involved printing in nylon, rather than ABS or PLA. One potential source of nylon filament are the cables that weed wackers use to chop down plants. When questioned about whether or not the process was safe to be around in an enclosed space, he designed a test procedure to find out how much, if any, hydrogen cyanide (HCN) was released by the 3D printing process.

The entire process is documented on Instructables. The short of it is that he tested several different types of ABS, and several different types of nylon, and found that the only plastic that produced any HCN was weed whacker line, and even that was only 0.1ppm (parts per million) which is significantly lower than the OSHA/NIOSH/ACGIH standard of 4.7ppm.

So, if you accept his results, there’s nothing to worry about. Taulman also has instructions for cold-rolling an oiler needle down to 0.32mm for high resolution extrusions, printable ball bearings races, and a permanent nylon coffee filter.

Science Enabled By Open Source Hardware

Science is a good match for the open source philosophy.

Because…

• it tries to do things for little-to-no money
• it doesn’t care if equipment is pretty
• it is only focused on results
• it needs things that are very specific that no one else in the world needs
• it is often motivated by something other than profit

Joshua Pearce of Michigan Tech’s Open Sustainability Technology Lab is an example of where the rubber meets the road. He has nearly two dozen Thingiverse things, and most of them are awesome tools for scientists. His work has been profiled in Mighigan Tech News and Popular Mechanics. You can also read the transcript of an interview with Science Magazine Podcast here (pdf). Pearce has a paper called Building Research Equipment with Free, Open-Source Hardware in Science Magazine, but it’s behind a paywall. The summary is here.

More after the jump.

RepRap 3D Printer Color Mixing Nozzle by James Corbett

If you’ve done any desktop 3D printing and, lets be honest, who hasn’t, right, then you’re aware of the limitation imposed on your creativity by the color of the plastic you’re printing in. Makerbot has sort of addressed the issue with their dual extruder, but it’s really only a tease. Being able to switch from one color of plastic to another only highlights the fact that you can’t print in any of the colors in between.

At first people tried to solve the problem by coloring white ABS filament with markers just before it entered the extruder. This approach worked. For example, the Filament Colorizer by cyclone holds two sharpies and makes your prints new colors. Dry erase markers also work, as demonstrated by scocioba. Also RyGuy. As an alternative, James Corbett has developed an extruder that mechanically mixes different colors of plastic. The idea is that you could have a roll of plastic in basic colors (like CMYK and black) that you just push into the mixing chamber in different proportions to create the full color wheel.

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Testing the marker thing was pretty straight forward. People just rubbed a marker on the plastic filament and it did pretty much what you’d expect. Testing the mechanical mixer was an entirely different story. Corbett went through several passive and active designs before he found one that successfully mixed the plastic. Follow the jump to read the conclusion and way ahead from his paper on the subject.

3D Printable Lathe

Thingiverse user Sublime has made this nifty mini-lathe that is mostly plastic parts printable on your average friendly neighborhood 3D printer.

Related Links:

• on Github
• Walters, Ray. (21May2012). 3D printing genius creates working lathe. geek.com

Crowd Funding Dump

Kickstarter has subdivided their “technology” category into “open software” and “open hardware” which makes my job a little faster. There aren’t very many things in it…but I suppose that also makes my job a little faster.

Summary:

• MaKey MaKey: Funded
• Safecast Geiger Counter: Funded
• QU-BD Universal 3D Printer Extruder: Funded
• B9Creator 3d printer: Funded
• Wireless Inventors Shield for Arduino: 16 days left
• Open Rail: 27 days left
• The Vision 3d printer: Funded
• Variable USB Power Supply: Not Funded
• Rapcraft 3d printer: Not Funded
• Plugable Thin Client: 8 days left
• Robotic Minion: 20 days left
• Tantillus 3d printer: 3 days left
• H1.1 SeeMeCNC 3d printer: 19 days left
• Wikispeed C3 car: 31 days left
• Kontinuum Garden: Not Funded

Details after the jump.

Naval Postgraduate School Crushes 3D Printed CubeSat for DARPA

CubeSat is a standardized (pdf) set of dimensions for small (10 cm) satellites that are particularly popular with colleges because students can actually test their satellites in space. Normally, CubeSats are made out of aluminum. DARPA wanted to know whether or not a 3D printed CubeSat is a plausible idea. They used their Digital Manufacturing Analysis, Correlation and Estimation (DMACE) competition as a chance to test the idea.

Test cube from DARPA DMACE challenge.

Wanna see a video of a 3D printed plastic cube being professionally obliterated? Got it, and more, after the jump…