3D Printering: A Call For An Open Source Automated Build Platform

I’ve said this before, and I’ll say it again: if you’re using a 3D printer to make a few hundred identical plastic parts, you’re doing it wrong. That’s the place for traditional manufacturing methods such as injection molding or resin casting. If, however, you’re looking at printing a few dozen identical plastic parts, or even running a script to optimize your machine time, the current open source 3D printer world leaves one thing to be desired.

An Automated Build Platform

An Automated Build Platform is a fairly simple idea: put a conveyor belt on your heated bed, and when the print is done, send a command to drive a motor, dumping the newly printed part into a bin, The printer then begins the next part with a clean bed, and the days of doting over a 3D printer soon fade into the past.

For such a simple and useful idea, it’s surprising there hasn’t been much done with this idea in open source circles. There are, of course, problems both technical and legal, but hopefully nothing that should indefinitely derail anyone who would want to create the first open source automated build platform.

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3D Printering: Pastestruders

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While bits of plastic are the usual material for 3D printers, there are hundreds of other materials that are equally well suited for 3D printing. One of the most famous is chocolate, a material so popular and easy to manipulate inside an extruder there are even Kickstarters for 3D printed chocolate bars.

teapotThere are many more materials deserving of being 3D printed, though: wax for lost wax castings, other foodstuffs for improbably shaped edibles, and ceramics so I can finally print a life-sized, functional version of the Utah Teapot.

Unfortunately, for all the progress of plastic extrusion, little has been done about extruding pastes, foods, and clay with a 3D printer. The RepRap paste extrusion working group is fairly close to being dead, so let this volume of 3D Printering explore what has been done in the world of paste printing.

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3D Printering: You Want UV Resin?

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Just a few short months ago, 3D printing with stereolithography was an uncommon and very expensive proposition. Consumer-oriented SLA machines such as the Form1 and the B9Creator are as expensive as the upper echelons of squirting plastic printers and the community behind these machines isn’t even as diverse as the forums for the fly-by-night printers featured on Kickstarter every week.

This may be about to change with last month’s reveal of the Peachy Printer, a remarkably clever stereolithography printer that requires no special equipment, hardly any electronics, and costs $100. Even if the folks behind Peachy never ship a single unit, their clever engineering ensures that stereolithography will be a staple in the makers toolbox in the near future.

There is, of course, the problem of material. While plastic filament can be bought  just about everywhere, UV curing resin is a little harder to come by and much more expensive per kilogram or liter. Where then does the stereolithography experimenter get their hands on some of this magical material from the future?

Before we get to the article…

I’ve been writing a 3D Printing column once a week for a few months now, and I’m running out of ideas. If you have something in the 3D printer world you’d like to see covered in a little more depth than the standard Hackaday post, send in a tip. I’ll send you a few Hackaday stickers if it’s a good idea.

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3D Printering: The Problem Of Thingiverse

Most makers, I’m sure, enter into the 3D printing world with a goal in mind. Whether that’s printing enclosures for projects, Warhammer figurines, robot chassis, or even a mechanical computer, there is usually some obvious utility in having a 3D printer at home. 3D printers are a machine tool, though, and any time it’s not being used means it’s an investment with a lower return, or at the very least a really cool toy gathering dust.

Where then do you find new stuff to print that you don’t design yourself?

For the longest time now, Thingiverse has been the largest repository to share, browse, and download object other people have made. Even I have some very stupid stuff up on Thingiverse and have made use of a few random objects I found on there. This does not mean the 3D printer community particularly likes Thingiverse, however: Last year, Makerbot, the people behind Thingiverse, changed the terms of use so (allegedly) Thingiverse owns everything uploaded to their service. Couple this with completely unsubstantiated rumors of things being removed from Thingiverse that compete with Makerbot products, and you have a perfect storm of people unsatisfied with an online repository of 3D objects.

There is a huge market for an online repository of user-submitted 3D objects that isn’t controlled by Makerbot, and many have attempted to enter the fray. Defense Distributed, the guys behind the 3D printed AR lowers and all-plastic handguns launched DEFCAD, a Thingiverse clone, made an attempt by mirroring thousands of Thingiverse objects, removing the attribution in violation of these object’s licenses. Shady, yes, but at least it’s an option. There are other repos such as Cubehero and the newly launched YouMagine, a repo developed by Ultimaker. the Luke Skywalker to Makerbot’s Darth Vader.

But here is the problem with Thingiverse: even if you would like to get away from using this Makerbot service, it’s still the largest collection of 3D printed objects on the Internet. It has the most users, and is growing more each day than any of its competitors. Putting your objects anywhere else only means fewer people will see them, and fewer still will incorporate your designs into their new designs.

There are a few tools for you to ‘roll your own’ object repository. Github has a great new tool for viewing diffs between different versions of objects. There’s even a lot of work in making the Github landing page more like a Thingiverse page. This doesn’t address the core value of Thingiverse – if all the objects aren’t catalogued in one database, searchable by anyone, it’s just not as useful a site as Thingiverse.

I’m simply not smart enough to offer up a solution to this problem. Therefore, I’m turning it on to you: how should the 3D printer community retain the great value Thingiverse offers while still making something as usable as the now-malagined site? Should any new site mirror objects already on Thingiverse a la DEFCAD, only with proper attribution? Who should control the portal to all the objects, if anyone?

If you have any ideas on how to solve the problem of Thingiverse, drop a note in the comments.

3D Printering: Alternative Filaments

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ABS and PLA are the backbones of the 3D printing world. They’re both easy to obtain and are good enough for most applications. They are not, however, the be-all, end-all filaments for all your 3D printing needs. Depending on your design, you may need something that is much tougher, much more flexible, or simply has a different appearance or texture. Here are a few alternative plastics for your RepRap, Makerbot, or other 3D printer:

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3D Printering: Key Patents

Here’s a little tip about tech blogs, and journalism in general: absolutely everything you read is one hundred percent true, except in the cases where you – the reader – know anything about the story being discussed. Those stores on Wired and CNet where a device using an ARM Cortex-M3 is described as having, “the same CPU as a modern-day smart phone?” Totally legit, unless you know that running Android on such a chip is a virtual impossibility.

Such is the case with ‘key 3D printing patents set to expire in 2014’ – a phrase bandied about tech blogs with the fervency of news the seventh seal has been broken. If you believe everything you read on the Internet, we’re looking at a world of 3D printed lollipops, unicorns, and rainbows in just a few short months. Following the logic of journalistic veracity above, this obviously isn’t the case. What does the expiration of these patents actually mean, then?

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3D Printering: Electronics Boards

If you’re gearing up to build a 3D printer, one of the first things you’ll need to look at is your options for electronics boards. Whether you decide to optimize for cost or capability, the choices you make during the planning stages of your build will drastically affect what the final project will look like and how it will behave.

There are a ton of electronics boards out there, so for this installation of 3D Printering, we’re going to take a look at what’s available. Hit the link below to give Hackaday more pageviews read the rest.

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