Credit For Clever Corner Clamp

We love this design’s simplicity, but its mundane appearance is deceptive because a lot is going on here. [Bas van Hassel]’s clamp looks like a bench cookie or maybe a compressed hockey puck, but one pie piece-shaped quadrant extends on dovetails to form a right-angle channel, perfect for holding your ninety-degree joint while your glue dries. Opposing disc edges are flat, so your clamp won’t slip. Divots on the top and bumps on the bottom keep your stacks nice and neat when you put them away. All around, we have no trouble believing this designer has spent a lot of hours in the woodshop.

As long as your wood pieces are the same thickness, it seems like a practical use of printer filament, but if you have different sizes, you can always pull the dovetail out of its groove. Thanks to the scaling feature built into slicing programs, we expect some precision makers to utilize this in projects like dollhouses and model airplanes. If you have a high-resolution printer, you could make some miniature tools to construct a flea circus set. At that point, you may need to make some smaller clamps.

Print orientation for the puck is straightforward as it is a print-in-place design, but sometimes it isn’t always clear, so listen to those who know better and don’t be afraid of gears in your vises.



Take Pictures Around A Corner

One of the core lessons any physics student will come to realize is that the more you know about physics, the less intuitive it seems. Take the nature of light, for example. Is it a wave? A particle? Both? Neither? Whatever the answer to the question, scientists are at least able to exploit some of its characteristics, like its ability to bend and bounce off of obstacles. This camera, for example, is able to image a room without a direct light-of-sight as a result.

The process works by pointing a camera through an opening in the room and then strobing a laser at the exposed wall. The laser light bounces off of the wall, into the room, off of the objects on the hidden side of the room, and then back to the camera. This concept isn’t new, but the interesting thing that this group has done is lift the curtain on the image processing underpinnings. Before, the process required a research team and often the backing of the university, but this project shows off the technique using just a few lines of code.

This project’s page documents everything extensively, including all of the algorithms used for reconstructing an image of the room. And by the way, it’s not a simple 2D image, but a 3D model that the camera can capture. So there should be some good information for anyone working in the 3D modeling world as well.

Thanks to [Chris] for the tip!

How To Drill A Curved Hole

Next time you’re renovating and need to run some cables around corners in you walls, save yourself some frustration by building [izzy swan]’s corner drilling rig. It’s something akin to a custom tunnel boring machine but on a small scale.

drill-a-curved-holeStarting with a piece of steel, [izzy] traced and cut out a 90 degree curve with an attached arm that will allow it to rotate from a central block. He then grabs a random drill bit and attaches it to a flex shaft which is secured to the leading point of the steel curve. To complete the handy setup the entire rig is bolted to a block that will clamp over the corner stock.

As it stands, it takes some elbow grease to get the drill through, but it’s not a purpose built setup. On a second demonstration, the flex shaft breaks, but the idea is there. Now, [izzy] advises that this is most easily accomplished when re-framing walls with no drywall obstructing your drill, but the concept for this rig could nonetheless prove handy for welding, grinding, and so forth along any angled curve.

If instead you want to push your carpentry skills to their limits, build a wooden Vespa.

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