Benchmarking A Garbage Disposal Using The 3DBenchy Tugboat

We’ve always had a love-hate relationship with 3DBenchy, the tugboat-shaped 3D printer calibration target. On one hand, it’s incredibly useful to have a common, widely used, and challenging benchmark object to evaluate printer performance and improve tuning, but we’d somehow like to get back the countless frustrated hours we’ve spent trying to get the damn thing perfect with various printers. So, it was with no little joy that we watched the video below by [Eric R Mockler], in which he uses 3DBenchy prints to benchmark his newest acquisition: a new-in-box garbage disposal he scored off Craigslist. Take that, tugboat!

[Eric] is considering using the disposal as the first step in a failed-print-recycling method to ultimately turn the waste back into filament, presumably to print more tugboats. The tiny bits produced by the disposal should provide a reasonable substitute for pelleted plastic feedstock going into a filament extruder, if the disposal is up to the task, that is. Reasoning that any device capable of grinding chicken bones should handle little plastic tugboats just as well, [Eric] gave it shot, and found that the ⅓-horsepower disposal had no problem grinding even 100%-infill PLA prints.

The video is short and to-the-point, so we’ll even excuse the portrait orientation, just this once. If you’re considering recycling your failed prints, too, you’ll also need a filament extruder, and we’ve got you covered with a low-cost version, or a high-throughput one.

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Print Your Own Filament

Ask anyone with a 3D printer what they make the most. They’ll probably say “trash.” There are extra pieces, stuff that oozes out of the extruder, support material, parts that didn’t stick to the bed, or just parts that needed a little tweaking to get right. No matter what you do, you are going to wind up with a lot of scraps. It would be great if you could recycle all this, and [3D Printing Nerd] looks at the FelFil Evo Filament extruder that promises it can do just that. You can see the video below.

As you’d expect, the device is a motorized auger that extrudes filament through a hot end not dissimilar to your printer’s hot end. You have to run a bag of special material through it first to clean out the plastic path. After that, you can create filament from standard pellets or pieces of old plastic.

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Filament Extruder Pumps Out 1kg/hour!

3D printers are awesome, and while the plastic filament may not be as much as a rip off as printer ink (yet), it’s still marked up at least 500%! If you really want to break free, you’re going to need your own filament extruder.

ABS, a typical printing material, will run you about $30 USD per kilogram. Don’t get us wrong, that will go a long way — but did you know ABS pellets (technically processed MORE than filament) can be as cheap as $3-4/kg?

What if you could buy the pellets, and make your own filament with them? If you do a lot of printing, this could save you a lot of money. We’ve seen lots of different filament extruders here on Hackaday, and here’s yet another iteration — capable of extruding at an extremely fast rate of 1kg per hour! [Ian McMill] was inspired by [Xabbax’s] Low Cost Filament Extruder, and has put together an excellent Instructable guide on how to make your own — with his own flair of course.

Take a look!

The LATHON Dual Nozzle 3D Printer


Our friends at Freeside Atlanta have been keeping busy despite the city-stopping snowstorms they’ve been suffering recently. This time it’s a 3D printer with dual extrusion: the LATHON printer. [Nohtal] bought his first 3D printer only two years ago, but his experiences led him to build his own to overcome some of the issues he encountered with standard printers.

The LATHON keeps the bed stable and instead moves only the nozzles, using Bowden extrusion to reduce the weight on the moving parts. A key feature is the addition of a second nozzle, which usually limits the print area. The LATHON, however, maintains a 12″x9″x8″ build volume thanks to the Bowden extruders. [Nohtal] documents the majority of his build process on Freeside’s blog, including using a plastic from GE called Ultem 2300 for the print bed, and running the printer through its paces with a slew of materials: ABS, PLA, HIPS, Nylon, TPE, Wood, and Carbon Fiber. You can find more information on the Kickstarter page or at

Check out some videos below!

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The FilaWinder


The latest addition to the line of 3D printer accessories is the FilaWinder, a tool for winding your filament neatly onto a spool. If you’ve abandoned buying your filament by the reel in favor of making your own from cheaper pellets—such as the Lyman Extruder, the Filabot Wee, or other alternatives, including the winder’s companion product, the FilaStruder—then you’ve likely had to roll everything up by hand, perhaps after it flopped around on the floor first.

The FilaWinder spools for you while the filament extrudes, using a sensor to adjust the winding the speed to match extrusion rates as well as running it through some PTFE tube to gently coil it as it moves along. Perhaps most important, the FilaWinder provides a guide arm to direct the filament back and forth across the reel as it spools up, to keep it evenly distributed. Swing by their Thingaverse page for a list of printable pieces and their assembly guide can be found here, as well as on YouTube. You can see an overview video of the FilaWinder winding away after the break.

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MakiBox Turns Plastic Pellets Into 3D Objects

The holy grail of desktop 3D printers – aside from manufacturing full color objects in any shape imaginable – is turning tiny plastic pellets into a plastic filament. Many projects have attempted this with moderate levels of success but turning pellets into filament still an open problem. MakiBot hopes to solve this problem by manufacturing plastic filament just in time to be squirted out a nozzle onto the print bed.

MakiBox is seeing a lot of potential with their pellet drive. Instead of sending huge amounts of pellets into an auger extruder, the team realized the best option would be to send pellets into the hot end one at a time. This makes for better thermal characteristics and produces a very consistent filament.

Turning plastic pellets into 3D objects is an enticing idea but producing a filament on the fly is an interesting concept. While the MakiBox team is making custom color filament right now, in the future it might be possible to mix colors for full-color prints.

Videos demonstrating the extruder after the break.

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Finally, Turning Plastic Pellets Into 3D Printer Filament

Here’s the situation: a kilogram of 3D printer filament costs about $50. A kilogram of plastic pellets costs less than a tenth of that. Does anyone have a solution to this problem?

For years now, the general consensus was making your own 3D printer filament at home was nigh impossible, dealing with temperatures, pressures, and tolerances that home-built machines simply can’t handle. [Bradley] sent in a filament extruder he made because he was disturbed at this current mindset that desktop filament factories have huge technical issues that have yet to be overcome.

[Bradley]’s extruder is based on the Lyman Filament Extruder, a machine that has successfully demonstrated taking plastic pellets, forming them into a filament, and having this filament used in the production of 3D printed parts. [Bradley]’s improvements include a variable-speed motor, a larger hot end, and an automatic timing system to produce set quantities of printer filament.

Of course, since Inventables threw $40,000 at the problem of creating filament at home there were bound to be more than a few successful designs making their way out into the public. When we last covered the developments of home filament manufacturing, the Filabot seemed to be in the lead. Now with [Bradley] (and  [Lyman])’s machines turning out usable filament, it’s only a matter of time before the 40 grand prize is snatched.