This Library Needs To Be At Least… Three Times Bigger

August 28, 2026 by Bryan Cockfield 11 Comments

Many of us have noted a tremendous price increase in many computer components for some mysterious reason. Whatever this cause is will be debated among the various modern philosophers and Diogeneses, but regardless of cause we all still have to live in this world and make do. That turns us towards getting maximum value from the things we already have rather than trying to go out and buy more computer components right now, like [svofski] using his vast swath of existing microSD cards to build an SD card library.

The library is based around a tiny robotic arm that can physically grip the cards and move them in and out of a reader. The first iteration of the arm involved rotating the two pincers, but this turned out to be overly complicated and [svofski] eventually settled on a design resembling a rack and pinion that slides the two pincers together instead. With the gripper sorted out, it’s placed in system called T-bot arrangement, similar to coreXY kinematics, that lets it pick and place among 12 microSD card slots.

Many of the parts in this build were directly from or inspired by 3D printers, making it relatively simple with so many parts available. [svofski] didn’t build it for a specific use case, though; mostly it was constructed out of fascination for robotic tape changers which perform a similar function. But for anyone who actually needs to duplicate a large number of SD cards, or other types of removable media, this could prove to be a fairly handy robot.

A Hot End And Material Database For 3D Printing

August 18, 2026 by Zoe Skyforest 17 Comments

When it comes to 3D printing in the FDM world, you can go a long way just relying on standard settings that ship with your 3D printer and/or slicer. If you want to push the limits, though, it pays to better understand the hardware and materials you’re working with to know what you can get away with. To that end, [Robert Samples] put together the MeltCalc database to help.

The purpose of MeltCalc is simple—it collates data on hot ends and materials regarding factors like maximum flow rate, print speeds, and heater requirements. If you’re wondering whether a given hot end can flow a given filament at a given rate, for example, this tool is a great place to start. It features 64 different hot ends and 36 polymers typically used in the 3D printing world, and can spit out maximum flow rates and print speed estimations even accounting for fancy tech like Core Heating Technology (CHT) nozzles. It’s all based on thermodynamic modelling which [Robert] put together based on his experience as a chemist who works with polymers. His aim was to provide a tool with realistic flow rates for hot ends, so that end users don’t have to just rely on often-optimistic marketing numbers.

For those eager to dive deeper into the code and modelling, the project source is available on Github. We’ve featured all kinds of other useful hacks in this space lately, too, like our recent look at how to achieve wave overhangs. If you’ve got your own nifty 3D printing tools in the works, don’t hesitate to notify the tipsline.

Cut And Fold Your 3D Printer’s Next Cover

July 15, 2026 by Donald Papp 15 Comments

[cmh]’s ultra-simple top cover for the Snapmaker U1 3D printer has a 3D model, but don’t let that fool you. There’s no 3D printing at all involved in this project. Rather, the model is a reference shape for making an effective top cover out of cardboard or corrugated plastic sheet (also known as Coroplast) which is what [cmh] used.

The pattern can be cut from a single sheet, or from multiple pieces taped together.

Corrugated plastic is a versatile option for things like printer enclosures. It’s cheap, a good insulator, easy to cut, and available from just about any plastics supplier. We’ve made the case that they’re a good alternative to acrylic sheets for printer enclosures, but [cmh] goes even further with a design that requires no additional hardware whatsoever. Assembly doesn’t even require more than tape, really.

He provides a cutout diagram for pieces that, when assembled, make a sort of hat that is just right to cover the top of the Snapmaker U1 without obstructing the extruders. One can even lift the front panel to access the inside without removing the cover, which is a nice touch. Should one wish to add a viewing window anywhere, just cut out a square and tape a sheet of clear plastic over the hole.

For a 3D printer, an enclosure and top cover helps retain heat, block drafts, and keep dust (or curious fingers) away from the printer’s build area. The cover doesn’t need to be completely sealed to deliver those benefits, but if you do prefer your covers completely enclosed, a carefully-chosen IKEA storage box makes a conveniently great cover for the U1.

Microdistillery For Microchemistry

July 3, 2026 by Bryan Cockfield 21 Comments

Much like radio operators being encouraged to use the least possible amount of power to make a contact, chemists have a similar rule encouraging using the least amount of materials in experiments. Not only is this rooted in economics, but in safety as well; if something goes wrong it’s generally good if there’s not excess amounts of reactants. With modern techniques, though, it’s possible to bring experimental chemistry down to incredibly small scales, and [Marb’s lab] found that they needed a custom built still for these new, diminutive experiments.

The first step is to build the heating component of the still. This is provided with a few custom aluminum parts for the base and a pair of heaters originally meant for 3D printers, with the assembled unit wrapped in insulation. The heater accomodates a 25 mL round-bottom flask. Temperature control of the heating mantle is provided by a controller mounted to a DIN rail which receives power from a 24V power supply, and an additional temperature probe is added to measure the temperature of the distillate. A test run with water shows the small still quickly and efficiently evaporating the water up to a condenser.

Although building a still doesn’t have to be technically difficult, building something this small that’s effective and safe is a bit more challenging than a backyard moonshining operation. Scaling chemical reactions down can often be a challenge but is possible with the right mindset and equipment. We’ve seen miniaturization of many things that we might not have expected including hydrogen production, aluminum smelting, and even the construction of a microscope.

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The Teenage Angst Of 3D Printing: Solidoodle, Printrbot, And Bridges

June 29, 2026 by Al Williams 43 Comments

Bridges are a part of our constructed landscape that we take for granted. And bridges by themselves aren’t especially important. What is important is that bridges let you get from one place to another. Technology is often the same. We get from point A to point B through some bridge technology that, probably, most normal people never even notice.

Years ago, point A was commercial 3D printing. Industry had stereolithography, selective laser sintering, fused deposition modeling, and other rapid-prototyping technologies. These were not toys. They were expensive industrial systems used by companies that needed prototypes badly enough to pay serious money for them.

Fast Forward to Today

Today, you can go to a big box store and buy a 3D printer for well under $1,000, and often far less. Modern machines are almost plug-and-play and tend to do all the hard parts for you. That’s point B. How we got between points is a story of hackers who had a dream, and many Hackaday readers lived through it and even played a part in that bridging.

For a long time, RepRap was synonymous with hobby-level 3D printing. The project, started by [Adrian Bowyer] at the University of Bath in 2005, was built around a powerful idea: a machine that could print many of its own parts, thereby helping make more machines. RepRap Darwin reached its early self-replicating milestones in 2008, and the movement produced a thicket of descendants, variants, and arguments about rods, belts, bearings, extruders, firmware, and what “self-replicating” really meant. Of course, the machine could only print some of the parts you needed, but it was still impressive how much of a printer you could make with one printer.

Without RepRap, the desktop 3D printer boom would have looked very different. It created a common pool of ideas: Cartesian frames, printed brackets, hobbed bolts, heated beds, RAMPS boards, Marlin firmware, and a whole common vocabulary. It also created the expectation that a 3D printer was something you could understand, modify, repair, and improve. That expectation would not survive everywhere, but it defined the early culture.

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IKEA Storage Box Just Happens To Make Great Printer Cover

June 14, 2026 by Donald Papp 7 Comments

The Snapmaker U1 3D printer is an impressive machine for the price, but [Beaver Works] found the optional factory-offered top cover a wee bit expensive for his tastes. The solution? 3D print a fixture and use a clear 45 L Samla storage box from IKEA as an effective and affordable cover for the machine.

Why a cover? A cover helps retain heat and block drafts, which can help improve print quality. A cover also keeps the machine’s insides dust and debris-free, not to mention serving as a decent barrier to curious fingers or paws.

This is a great use of an off-the-shelf product that performs at least as well as any bespoke solution. The nature of printer enclosures makes them trickier than one might think, with the size and weight of materials often driving costs up for something that seems relatively simple in concept. Getting one by 3D printing the fixtures and purchasing the bulky part locally and affordably is a great alternative. IKEA even sells the box’s lid separately, so one can buy just the box and isn’t stuck with an unused lid afterward.

Integrating off-the-shelf components into a design is often risky because much of it is outside the designer’s control. Availability can change, and a manufacturer might alter dimensions or design elements without any notice. But IKEA’s storage products are pretty well standardized and work really well for this purpose.

On the off chance you need a design tweak, [Beaver Works] has provided STEP files for the 3D-printed parts, something we always love to see.

A small, orange 3D printer is shown on a desk with a filament dry box. The printer is printing a waving cat figurine. The printer is a CoreXY configuration, and the side panels are 3D-printed orange plastic.

3D Printing A Miniature CoreXY Printer

June 6, 2026 by Aaron Beckendorf 7 Comments

Although no longer so common as during the heyday of the RepRap movement, it’s easier than ever to build your own largely-printed 3D printer, with designs such as Voron’s delivering excellent quality. Nevertheless, there are still niches to be filled by new designs, such as [Alex Yu]’s mostly-printed Encore design.

The Encore uses CoreXY kinematics and linear rails for the X and Y axes. Its has no internal frame; the linear rails are mounted directly to the side panels, which were printed but provided sufficient rigidity. The printer is modular, and all the parts are designed to fit within a 225 mm print bed. The Encore itself uses a 120 mm bed, a Bowden extruder, and a lightweight Bambu-style hotend. The drive motors are NEMA 17 stepper motors, and they use sliding mounts for belt tensioning. The power supply sits behind the rods supporting the Z axis, and the controller board is in the base of the printer.

Building the printer was simple; tuning it, less so. The combination of a Bambu-type hotend with a Bowden extruder created some complications, and the hotend initially received too little cooling. [Alex] solved the cooling issues by using a stronger fan on the hotend, redesigning the ventilation shroud, and adding two inward-blowing fans along the sides of the build volume. After correcting some issues with Z-axis stability, the Encore produced some quite good-looking parts. [Alex] is still improving and documenting some aspects of the printer, but he’s uploaded his progress so far to GitHub.

We’ve seen some mostly-printed printers before, including a high-speed printer, one which printed all structural components, and one which was entirely 3D printed.

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