A 3D-printed clock that uses flaps for the digits that get rotated.

Non-Split-Flap Clock Does It With Fewer Flaps

May 16, 2024 by Kristina Panos 17 Comments

As cool as split-flap clocks and displays are, they do have a few disadvantages. The mechanism sticks out on the side, and the whole thing relies on gravity. Some people don’t care for the visual split in the middle of each digit that comes as a result. And their cousins, the Numechron clocks? Those wheels, especially the hours wheel, are really big compared to the size of what they display, so the clock housings are huge by comparison.

[shiura] decided to re-invent the digital display and came up with this extremely cool spinning flap mechanism that uses a lip to flip each flap after it is shown. Thanks to this design, only half the number of flaps are needed. Not only is the face of the clock able to be much larger compared to the overall size of the thing, the whole unit is quite shallow. Plus, [shiura] tilted the display 15° for better visibility.

If you want to build one of these for yourself, [shiura] has all the STLs available and some pretty great instructions. Besides the printed parts, you don’t need much more than the microcontroller of your choice and a stepper motor. Check out the demo/build video after the break, and stick around for the assembly video.

Don’t mind the visual split in the numbers? Check out this split-flap clock that uses a bunch of magnets.

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The 3D Printed Computer Space Takes Shape

May 10, 2024 by Jenny List No comments

A few weeks ago we brought you news of a project to recreate the flowing lines of the first computerised arcade game, Computer Space, as a full-size 3D printed replica. We left the project with all the parts put together to make a complete but unfinished shell that was very recognizable as a Computer Space cabinet but had neither finishing nor internals. Now we’re very pleased to bring you the conclusion of the project, as it moves from unfinished 3D print to playable cabinet.

The video below the break is a journey of print finishing to a very high standard with that lustrous blue glitter resin, but oddly it’s most interesting to find out about the manufacturing quirks of the original. How the rear door was imprecisely cut from plywood and fixed on with gate hinges, how the ventilation holes differ from cabinet to cabinet, and how the collection vessel for those quarters was an old tin. The monitor is a newer broadcast CRT in this version and the electronics are naturally modern, but if you didn’t know, you’d be hard pressed to spot that you weren’t playing the real thing.

Finally we see the gameplay which is admittedly frustrating, and a little bit of punditry as to why this wasn’t the commercial success of the following Pong. It’s a fascinating look at the early computer game industry.

Have a look at our coverage of the first episode of this project.

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3D Printed Adapter Helps You Eat Chicken Nuggets On The Highway

April 27, 2024 by Lewin Day 62 Comments

So often, we see 3D printers used to create some nifty little tool for a tricky little job. Maybe it’s to lock cams together for a timing belt change, or to work as a jig for soldering some complex device. However, some hacks are even simpler than that. [maker_guy] realized that eating nuggets in the car could be easier than ever with a little printed adapter.

The print is simple. It’s a round caddy for the nugget sauces given out by Chick-fil-A restaurants. Why round? Because it lets the nugget sauce sit neatly in your car’s cupholder at an accessible height. Put the sauce tub in the adapter, peel it open, and you can dip to your heart’s content.

So simple, yet a game changer all the same.

No more delicately balancing Zesty Buffalo by the gearstick while you try and chow down. Nor will your seat covers be tainted with Honey Mustard!

“Not a hack!” you scream. “It’s frivolous nonsense!” To that I say, are you a nugget eater or not? I myself partake, and I can absolutely see the value in this. You see, us journalists work hard. We’re often stuck eating substandard food in our cars on the way from one thing to another, like so many others in busy professions. If a smart little 3D-printed adapter can make mealtime easier and save some mess, I’m calling that a win.

You should never be afraid to use your creativity to make tools to improve your life. Parts are on Thingiverse if you need to print your own. Mod it to suit McDonald’s product if you need. Heck, print in black and it’d look like a stock part of the car!

You don’t have to like this simple adapter, but you can’t deny its utility! Share your own nifty little adapter ideas in the comments.

Manual Supports For 3D Printing

April 21, 2024 by Al Williams 14 Comments

[MakerSpace] wanted to 3D print an RFID card holder. On one side is a slot for a card and on the other side has recesses for the RFID antenna. They used these to control access to machines and were milling them out using a CNC machine. Since there were no flat surfaces, he had to turn on supports in the slicer, right? No. He does use supports, but not in the way you might imagine.

Inspired by creating cast iron using sand casting, he decided to first 3D print a reusable “core” using PETG. This core will support future prints that use PLA. When printing the actual item, the printer lays down the first few layers and pauses. This allows you to stick the core in and resume the print. After the print completes, you can remove the core, and the results look great, as you can see in the video below.

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FLOSS Weekly Episode 778: OctoPrint — People Are Amazing At Breaking Things

April 10, 2024 by Jonathan Bennett 7 Comments

This week Jonathan Bennett and Katherine Druckman sit down with Gina Häußge to talk OctoPrint! It’s one of our favorite ways to babysit our 3D printers, and the project has come a long way in the last 12 years! It’s a labor of love, primarily led by Gina, who has managed to turn it into a full time job. Listen in to hear that story and more, including how to run an Open Source project without losing your sanity, why plugins are great, and how to avoid adding a special services employee as a co-maintainer!

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3D Printer Hot Off The Griddle

April 5, 2024 by Al Williams 9 Comments

If you look at [Proper Printing’s] latest video — see below — you’ll immediately get the idea behind his latest printer. There are two heads on two separate gantries, which, of course, opens up many possibilities. But when you think you’ve seen enough, you find out the heated bed is a kitchen griddle, and… well, for us, we had to keep watching.

The heated bed idea was interesting, although the flatness left something to be desired. While it is a simple idea, getting the two gantries to move reliably across the hotbed griddle took a lot of parts and a careful design. We wonder how evenly the griddle heats — ours definitely has hot spots when we cook with it.

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Wear Testing Different 3D Printer Filaments

April 2, 2024 by Jenny List 5 Comments

Over the couple of decades or so since it started to be available at an affordable level, 3D printing has revolutionized the process of making custom objects. But as anyone with a 3D printer will know, sometimes the materials don’t quite live up to the application. There is a huge variety of available filaments to help make better prints, but which one really is the most hard-wearing? [My Tech Fun] set out to measure the resistance to wear of a variety of different 3D printed materials.

The test takes a standard print made across a variety of different materials, and several of each using different manufacturers’ offerings. These are then put on a test rig that moves backward and forward twice a second, with the test piece rubbing against a steel shaft under pressure from a 2.5 kg weight.

As might be expected, the common and cheap PLA performed the worst while PETG, PA, and TPU performed the best. But for us the interesting part comes in the variance between brands; the best PLA sample outperforms the worst ABS and nearly equals the worst of the PETG. Proof that maybe you do get what you pay for.

The whole test is well worth a watch, and if you 3D print anything that might be subjected to mechanical stress you should find it to be of interest. If comparing filaments is something you’d like to see more of, we’ve featured some tests before.

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