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Edm 3d printer
Powercore Aims To Bring The Power Of EDM To Any 3D Printer
- by: Dan Maloney
The desktop manufacturing revolution has been incredible, unleashing powerful technologies that once were strictly confined to industrial and institutional users. If you doubt that, just look at 3D printing; with a sub-$200 investment, you can start making parts that have never existed before.
Sadly, though, most of this revolution has been geared toward making stuff from one or another type of plastic. Wouldn’t it be great if you could quickly whip up an aluminum part as easily and as cheaply as you can print something in PLA? That day might be at hand thanks to Powercore, a Kickstarter project that aims to bring the power of electric discharge machining (EDM) to the home gamer. The principle of EDM is simple — electric arcs can easily erode metal from a workpiece. EDM machines put that fact to work by putting a tool under CNC control and moving a precisely controlled electric arc around a workpiece to machine complex shapes quickly and cleanly.
Compared to traditional subtractive manufacturing, EDM is a very gentle affair. That’s what makes EDM attractive to the home lab; where the typical metal-capable CNC mill requires huge castings to provide the stiffness needed to contain cutting forces, EDM can use light-duty structures and still turn out precision parts. In fact, Powercore is designed to replace the extruder of a bog-standard 3D printer, and consists almost entirely of parts printed on the very same machine. The video below shows a lot of detail on Powercore, including the very interesting approach to keeping costs down by creating power resistors from PCBs.
While we tend to shy away from flogging crowdfunded projects, this one really seems like it might make a difference to desktop manufacturing and be a real boon to the home lab. It’s also worth noting that this project has roots in the Hackaday community, being based as it is on [Dominik Meffert]’s sinker EDM machine.
[David] tipped us off to this one. Thanks, [David]!
Machine Metal With Electricity: An EDM Attachment For 3D Printers
- by: Adam Fabio
[SuperUnknown] has revealed a secret project he’s been working on.
He’s cooked up an EDM attachment for 3D printers, or any CNC machine for that matter. Electrical Discharge Machining (EDM) is a method of using sparks to machine metal. EDM isn’t a new technology, in fact commercial machines have been around since the 1960’s. If you’ve ever had an arc scar up your multimeter probes, you’ve unwittingly done a bit of EDM.
The theory behind EDM is simple: High voltage between the tool and workpiece causes sparks to jump between them. Each spark erodes the workpiece (and the tool). Big EDM machines perform their magic in a liquid which acts as both a dielectric and a flushing medium. This liquid can be anything from deionzed tap water to specially formulated oil. [SuperUnknown] is using good old-fashioned tap water.
As you can imagine, a single spark won’t erode much metal. EDM machines fire tens of thousands of times per second. The exact frequencies, voltages, and currents are secrets the machine manufacturers keep close to their chests. [SuperUnknown] is zeroing in on 65 volts at 2 amps, running at 35 kHz.
He’s made some great progress, gouging into hardened files, removing broken taps from brass, and even eroding the impression of a coin in steel.
While we’d love to say this is a free open source project, [superUnknown] needs to pay the bills. He’s going with crowdsourced funding. No, not another Kickstarter. This project is taking a different route. The videos of the machine will be uploaded to YouTube and visible to [superUnknown’s] Patreon supporters. They will also be available for rent using YouTube’s new rental system. [SuperUnknown] has pledged to figure out a way to make the content available for starving college students and others with limited incomes.
Based upon his previous adventures with lil’ screwy, his homemade 100 ton press, and various other projects on the Arduino verses Evil YouTube channel, we think [superUnkown] has a pretty good chance of making home EDM work. Click past the break to see two videos of the 3D printer EDM toolhead in action. We should mention that [SuperUnknown] is rather colorful with his dialogue, so make sure you’re using headphones if you’re at work.
3D-printed colorful Eden collection in different materials
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Michaela Janse van Vuuren, designer and engineer from South Africa, has developed a unique collection of colored garments shoes printed from different materials on Stratasys Objet500 Connex3 3D printer.
The collection includes a Stained Glass corset, Classic Serpent shoes and belt, and Fish in Coral bracelets. Most of the items in the collection were 3D printed in one session. In the course of their manufacture, different colors and materials were used.
Inspired by the story of Eden, van Vuuren embodied in her collection a world where Eve controls the Serpent, preventing the fall of paradise and any punishment against her descendants. Here she plays a role directly opposite to that in the original parable. “In this version, a woman is a free and strong being, she is in complete control of the situation and can become anyone. She controls her own destiny,” explains van Vuuren.
Stained Glass Corset
Stained Glass Corset decorated with flowers, berries and leaves of the forbidden tree in the Garden of Eden. In an attempt to capture the beauty of church stained glass windows, van Vuuren, along with Tal Eli, a materials engineer at Stratasys, used a palette of three base materials: clear and transparent, rubber-like materials, and VeroMagenta to capture hot pink and purple.
3D printing technology has inspired the designer to create highly complex structures with different materials and colors that have never before been combined in a single print session.
Classic Serpent Shoes
The collection also features several pairs of 3D printed shoes with an attractive snake design, symbolizing the change of power and the enslavement of the snake instead of the woman. Each pair of shoes features rigid elements for durability, rubber-like elements for flexibility, and a color palette to complete the look. In addition, a fashionable snake-print belt was 3D printed from elastic colored material.
3D printed experimental bracelets complete the collection. According to van Vuuren, rigid mechanical couplings were developed to create them, and they also had to work with the properties of materials in order to obtain iron-like elements.
“With these fashion accessories, we wanted to convey the beauty of the water in the Garden of Eden.
The Fish in Lilies bracelet is equipped with rigid mechanical hooks so that it can be wrapped around the wrist. For Fish in Coral, here we experimented with different material properties to create a more flexible version,” says van Vuuren.
“The possibility of combining rigid and flexible materials in one item is rare. When you add a vibrant color palette to that, the creative process becomes something completely new,” says van Vuuren.
For a closer look at the collection of 3D printed fashion items for clothing and footwear, watch the video interview with Michaela van Vuuren.
Article prepared for 3DToday.ru
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