3D Printing with Mussels and Beets

What do you get when you combine oven-baked mussels and sugar beets in a kitchen blender? No, it isn’t some new smoothie cleanse or fad diet. It’s an experimental new recyclable 3D printing material developed by [Joost Vette], an Industrial Design Engineering student at Delft University of Technology in the Netherlands. While some of the limitations of the material mean it’s fairly unlikely you’ll be passing over PLA for ground-up shellfish anytime soon, it does have a few compelling features worth looking into.

Joost Vette

For one thing, it’s completely biodegradable. PLA is technically biodegradable as it’s usually made primarily of cornstarch, but in reality, it can be rather difficult to break down. Depending on the conditions, PLA could last years exposed to the elements and not degrade to any significant degree. But [Joost] says his creation degrades readily when exposed to moisture; so much so that he theorizes it could have applications as a water-soluble support material when printing with a multiple extruder machine.

What’s more, after the material has been dissolved into the water, it can be reconstituted and put back into the printer. Failed prints could be recycled directly back into fresh printing material without any special hardware. According to [Joost], this process can be repeated indefinitely with no degradation to the material itself, “A lot of materials become weaker when recycled, this one does not.

So how can you play along at home? The first challenge is finding the proper ratio between water, sugar, and the powder created by grinding up mussel shells necessary to create a smooth paste. It needs to be liquid enough to be extruded by the printer, but firm enough to remain structurally sound until it dries out and takes its final ceramic-like form. As for the 3D printer, it looks like [Joost] is using a paste extruder add-on for the Ultimaker 2, though the printer and extruder combo itself isn’t going to be critical as long as it can push out a material of the same viscosity.

We’ve seen a number of DIY paste extruder mods for 3D printers, which is a good starting point if you’re getting sick of boring old plastic. Before long you might find yourself printing with living tissue.

[Thanks to Mynasru for the tip]

Next Week: Bring-A-Hack In NYC

Hackaday, along with Ultimaker and New Lab, are hosting an extravaganza of super hacks and more in New York next week. Grab a project you’re working on and join us on Wednesday, February 28 in Brooklyn.

This is all about showcasing the coolest, newest stuff being worked on by makers, hackers, artists, and engineers. Get ready to talk hardware, stare into far too many LEDs, and enjoy drinks and camaraderie. The event is being hosted by New Lab, and we’re teaming up with Ultimaker to bring you a night of fun and solder fumes. We have great speakers lined up, and we’ve blocked out some time for lightning talks too so fill out this form if you’re interested.

Support for the KiCad Project

RSVPs for this meetup are $5, with all proceeds being donated to the KiCad project via CERN.

Sending some funding to support this Open Source EDA project is a great thing. If this fee is a no-go for you, we’re also looking for a few volunteers for the event. If you’d like to help out and skip that $5 cover, send us a note on Hackaday.io.

Blinking LEDs on the Internet of Printers

When you ask for recommendations on which 3D printer to buy, damn the cost, the Ultimaker is consistently at the top of the list. There’s a reason for the popularity of this printer — it’s easy to use, extremely high quality, and has an entire freakin’ Linux system running somewhere under the hood. That last bit is opening up a few doors to some interesting hacks, like using a 3D printer as an RGB LED.

The Doodle3D team has been playing around with the Ultimaker API to see if they can make their software work with the Ultimaker printer. The Ultimaker has RGB LEDs, so obviously the simplest proof of concept in futzing around with an API is to blink a few LEDs. The actual code was written in HTML, JavaScript, and Node in just two hours. The author admits it’s ugly, but it works. Can’t go wrong with that.

While this is just a simple test of the Ultimaker API, it’s surprisingly high up on the Google results when you search, ‘Ultimaker API’. That’s a shame, because there’s a lot of power under the hood of this printer. If you have some sort of mod you’d like to throw into the ring, here’s the Hackaday Tip Line.

You can check out the demo video of this hack below.

Continue reading “Blinking LEDs on the Internet of Printers”

3D Printed Door Latch has One Moving Part – Itself!

A group at the Hasso-Plattner Institute in Germany explored a curious idea: using 3D printed material not just as a material – but as a machine in itself. What does this mean? The clearest example is the one-piece door handle and latch, 3D printed on an Ultimaker 2 with pink Ninjaflex. It is fully functional but has no moving parts (besides itself) and has no assemblies. In other words, the material itself is also the mechanism.

The video (embedded below) showcases some similar concept pieces: door hinges, a pair of pliers, a pair of walker legs, and a pantograph round out the bunch. Clearly the objects aren’t designed with durability or practicality in mind – the “pliers” in particular seem a little absurd – but they do demonstrate different takes on the idea of using a one-piece item’s material properties as a functional machine in itself.

Continue reading “3D Printed Door Latch has One Moving Part – Itself!”

Tribed 3D Printer Configuration Doesn’t Ever Need To Be Leveled

[Jeremie Francois] has been thinking about ways to improve tool height adjustment and bed leveling in his 3D printer for a long time. His dream was to never ever think about Z height again. A dream that’s shared by many. These days, a lot of 3D printers have a mechanism for auto leveling in the software of the 3D printer. This works pretty well, but for various mechanical reasons, it’s better to have the bed itself be level.

[Jeremie]’s approach is pretty clever. Since you can define any plane mathematically with three points, he has three Z-axis lead screws. This lets him tilt the bed at any angle he likes. Once he had the mechanics in place, he added some force sensitive resistors, an Arduino, and wrote an extension for the popular Marlin firmware. That’s when the problems started.

It turns out that solidly mounting the bed to the resistors transmitted way too many vibrations. The solution was a layer of neoprene rubber. The neoprene also acts as a cushion, so the nozzle won’t break the glass bed during the leveling procedure.

The video after the break is a bit wavy, due to YouTube’s terrible auto-stabilizing software, but if you watch closely, you can see the system at work.

Continue reading “Tribed 3D Printer Configuration Doesn’t Ever Need To Be Leveled”

The 3D Printers of CES

CES, the Consumer Electronics Show, is in full swing. That means the Hackaday tip line is filled to the brim with uninteresting press releases, and notices that companies from the world over will be at CES.

3D printing has fallen off the radar of people who worship shiny new gadgets of late, and this is simply a function of 3D printing falling into the trough of disillusionment. The hype train of 3D printing is stuck on a siding, people are bored, but this is the time that will shape what 3D printing will become for the next ten years. What fascinating news from the 3D printing industry comes to us from CES?

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Injecting SD Card Bootloaders

[Frank] has a Ultimaker2 and wanted to install a new bootloader for the microcontroller without having physical access to the circuitry. That means installing a new bootloader for the ATMega2560 without an In System Programmer, and as is usual on AVRs, the bootloader can only be edited with an ISP. Additionally, modifying the bootloader in any way runs the risk of corruption and a bricked circuit. That’s okay, because [Frank] knows how to do it, and he’s here to show you how.

You can think of the memory layout of the ATMega in the Ultimaker as being split in half, with the printer firmware in the first half and the bootloader in the second half. There’s extra space in both halves, and that’s something that comes in very useful. When the circuit powers up, it jumps to the bootloader, does it’s thing, then jumps to the very beginning of the application code – a vector table – that starts up the actual firmware.

[Frank]’s trick to adding on to the bootloader is to place the SD card bootloader in the space normally reserved for applications, not where you would expect to find a bootloader. This code is accessed by the stock bootloader jumping into a modified vector table at the beginning of the application data that points to new executable code. That code is the actual SD card bootloader, but because it is in the application part of the memory, it can’t perform Flash writing or erasing. To fix that, a tiny bit of code is tacked onto the end of the bootloader for performing Flash writes and jumps back to the application part of memory.