UK Cops Fear Gun; Pointlessly Seize 3D Printer


Above, according to the greater Manchester Police force, is a 3D printed gun. Well, the rozzers say it’s merely a trigger for a gun. In part they’re actually correct; it is a trigger. For a spring-loaded extruder for the Makerbot Replicator.

For the past few days, the media has been abuzz about the first seizure of a 3D printer (a Makerbot Replicator 2) in Manchester, UK during a raid on suspected gang members. Despite numerous complaints and comments by makers across the UK (thanks, guys), Assistant Chief Constable [Steve Heywood] says, “We need to be absolutely clear that at that this stage, we cannot categorically say we have recovered the component parts for a 3D gun.” The seized 3D printer parts are being sent to ballistics experts to determine if a random piece of plastic can be used in the manufacture of handguns.

Alright kiddos, editorial time. We’re quite aware that the UK is a little…. different… than the US when it comes to firearms regulation. Nevertheless, we feel the need to defend anyone with a 3D printer, in a handy Q&A format:

What this has also done is open up a wider debate about the emerging threat these next generation of weapons might pose.

No, it doesn’t. I don’t know what the British equivalent of a Home Depot is, but I could go to that store, buy some stuff, and build a zip gun. Of course I wouldn’t, because that’s not safe. I could also use a mill and lathe to make a proper gun.

But it’s made of plastic and thus undetectable

Bullets aren’t. Also, I could machine some Delrin. You should really watch In the Line of Fire.

But plans for 3D printed guns are available, making it easy for anyone to fabricate their own gun

Yeah, and Hackaday made one. There were a lot of problems with those 3D printer files. The spring wouldn’t slice, the hammer wouldn’t print, every part was out of scale, and you’d need a lot of experience in 3D modeling and design to turn those ‘plans available on the Internet’ into something you can send to a printer.

Your posting this article further sensationalizes the role of 3D printers in gun control.

You’re right. Here’s what you do: every time someone mentions 3D printed guns, say, “You can build an even better gun with a combo mill/lathe that costs the same as a 3D printer. Equal skill is required to operate both machines. Do you intend to ban the sale or use of machine tools?”

But UK gun laws are weird.

Then print a knife.

via reddit

3D Printed Cutaway Jet Engine Sounds Great


Thanks to the wonders of 3D printing, you can now have a 3D printed a jet engine of your very own. Unlike jet engines we’ve seen before, this one comes with no chance of the operator getting burned to a crisp. [Gerry] is a self-proclaimed “broken down motor mechanic” from New Zealand. He’s designed a rather awesome jet engine in 3D Software, and printed it on his UP Plus printer. The engine itself is a cutaway model of a high-bypass turbofan engine. While we’re not sure which make and model of jet engine this cutaway represents, we’re still very impressed.

This isn’t just a static display model – the engine will actually spin up with the help of compressed air.  Separate start and run tubes send air to the turbine and main fain respectively. It even has that distinctive turbofan “buzz saw” sound. While this model is relatively safe, [Gerry] does warn to keep the pressure down, or it could come apart. To that end we’d recommend adding a regulator before the quick disconnect.

The Thingiverse project is a bit light on instructions.  However this situation is remedied by [hacksaw], who posted a pictorial and build log up on pp3d. [Hacksaw] did run into a few problems with the build, but nothing a little bit of superglue couldn’t fix. It may have fewer moving parts, but this definitely puts our old Visible V8 Engine kit to shame.

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Blender CAM – Open Source CAM Software


[Vilem] sent in a tip about a plugin he’s been working on for Blender, called Blender CAM. It allows for exporting directly from Blender to a G-code file. He has been working on it for several months, and releasing regular updates with various tweaks and improvements. While the project isn’t complete, [Vilem] has made some very impressive progress. It currently supports 2D and 3D strategies, various cutter types, simulation of 3D operations, and even automatic bridges.

The image above was made using the plugin, and it shows the level of detail possible. We can’t wait to see the 4 and 5-axis support that he is planning on adding.

A basic tutorial video is embedded after the break. As with anything Blender-related, it isn’t incredibly automatic, but another free tool is definitely a good thing. It looks like [Vilem] is looking for some other developers who could help out. If you have the knowledge, you might consider contributing.

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SCARA Arm Becomes Enormous 3D Printer


When you find an old, disused 80s-era SCARA arm in a lab, there’s really not much more you can do than make a giant 3D printer with it.

The last time we saw [Dane]‘s salvaged SCARA arm, he had reconstructed the electronics by building his own servo motor controllers and feedback sensors. There were a few initial test prints, but the new upgrades to this printer make it much more useful, make it look even more kludged together, and made the prints even more accurate.

The largest upgrade to the new machine is an updated heated build plate. The previous plate used six 30W resistors. Good enough, but with two additional 245W membrane heaters, [Dane] can now keep his build plate at a constant 65 degrees C. Keeping such a large area warm requires a heated build chamber, so [Dane] came up with a giant semi-hexagonal box of warm made from aluminum extrusion, laser-cut parts, and acrylic frames.

Compared to earlier prints, the SCARA arm is printing some very nice parts including a battery holder for 40 LiFePO4 cells, and a beautiful propeller for a 3D printed boat. It’s an impressive build, made even more so by the fact this robotic arm was found during a lab cleanup.

Priceless Paintings – Scanned and Printed in 3D


When we think of works by Van Gogh and Rembrandt, most of us remember a picture, but we aren’t accustomed to seeing the actual painting. [Tim Zaman], a scientist at Delft University of Technology in the Netherlands, realized that the material presence of the paint conveys meaning as well. He wanted to create a lifelike reproduction in full dimension and color. While a common laser-based technique could have been used for depth mapping, resolution is dependent on the width of the line or dot, and the camera cannot capture color data simultaneously with this method. In his thesis, [Tim] goes into great detail on a hybrid imaging technique involving two cameras and a projector. He and his team eventually used two 40-megapixel Nikon cameras in conjunction with a fringe projector to capture a topographical map with in-plane resolution of  50 μm, and depth resolution of 9.2 μm.

We can’t find a lot of information on the printing process they used, other than references to high-resolution 3D printers by Océ (a Canon company). That said, [Tim] has provided a plethora of images of some of the reproductions, and we have to say they look amazing. The inclusion of depth information takes this a big step further than that gigapixel scanning setup we saw recently.

Check out the BBC interview with Tim, as well as time lapse videos of the scanning and printing process after the break.

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World Maker Faire 2013: The Sub-$500 Deltaprintr

There are a few delta bot 3D printers out there such as the Rostock which, while being a very nice printer, is still a little expensive. When [Shai] from SUNY wanted to use a 3D printer for his artistic and academic pursuits, he decided to build his own printer. Thus the Deltaprintr was born.

Instead of printed parts, the Deltaprintr uses laser cut and machined parts for just about all of its bill of materials. The three motors mounted in the base are connected to the delta arms with Spectra fishing line, thus getting rid of the ludicrous cost of belts of the requisite length.

Everything is Open Source, and the guys behind the project should be putting their printr up on Kickstarter sometime next month. Word is the entire thing should be sub-$500, and a little bit of guessing tells me that doesn’t mean $499.

A $100 Stereolithography 3D Printer


The Hackaday tip line has been blowing up with a new Kickstarter for a 3D printer. Although this is a pretty common occurrence around here, this printer is actually very interesting: it’s quite possibly the simplest and cheapest laser resin printer ever.

Most of the 3D resin printers we’ve seen, like the Form1 use mechanical means to raise a print up to the next slice. At $100, the Peachy printer doesn’t have the budget for such luxuries as servos or motors, so the layer height is increased by dripping salt water over the liquid resin. The X and Y axes are controlled with mirrors and voice coils, allowing this printer’s electronics to be controlled by a computer’s sound card. It’s really amazing in its simplicity, and from the looks of it the Peachy can produce some fairly good prints.

For a great explanation of how the Peachy printer works, you can check out the video below.

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