Category Archives: Delta

Delta Bot Plucks Out Tunes on a Mandolin

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Is there no occupation safe from the scourge of robotic replacement? First it was the automobile assemblers, then fast food workers, and now it’s the — mandolin players?

Probably not, unless [Clayton Darwin]’s mandolin playing pluck-bot has anything to say about it. The pick-wielding delta-ish robot can be seen in action in the video below, plucking out the iconic opening measures of that 70s prom-theme favorite, “Colour My World.” The robot consists of two stepper motors connected to a hinged wooden arm by two pushrods. We had to slow the video down to catch the motion, but it looks like …read more

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Rewound and Rewired BLDC Makes a Half-Decent Generator

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What’s the best way to turn a high-powered brushless DC motor optimized for hobby use into a decent low-RPM generator? Do you take a purely mechanical approach and slap a gearbox on the shaft? Or do you tackle the problem electrically?

The latter approach is what [GreatScott!] settled on with his BLDC rewinding and rewiring project. Having previously explored which motors have the best potential as generators, he knew the essential problem: in rough terms, hobby BLDCs are optimized for turning volts into RPMs, and not the other way around. He started with a teardown of a small motor, to …read more

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Stepper Motor Mods Improve CNC Flat Coil Winder

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Finding just the right off-the-shelf part to complete a project is a satisfying experience – buy it, bolt it on, get on with business. Things don’t always work out so easily, though, which often requires the even more satisfying experience of modifying an existing part to do the job. Modifying a stepper motor by drilling a hole down its shaft probably qualifies for the satisfying mod of the year award.

That’s what [Russ] did to make needed improvements to his CNC flat-coil winder, which uses a modified delta-style 3D-printer to roll fine magnet wire out onto adhesive paper to form …read more

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Five Weakest Links in Cybersecurity That Target the Supply Chain

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Third-party breaches have become an epidemic as cybercriminals target the weakest link. Organizations such as BestBuy, Sears, Delta and even NYU Medical Center are just a few that have felt the impact of cyberattacks through third-party vendors. The fa… Continue reading Five Weakest Links in Cybersecurity That Target the Supply Chain→

Open Source DIY Printers are Alive and Well: What We Saw At ERRF 18

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If you follow the desktop 3D printer market, it probably won’t surprise you to hear that nearly every 3D printer on display at the inaugural East Coast RepRap Festival (ERRF) was made in China. Even Printrbot CEO Brook Drumm had to admit that this was the year his company may finally bite the bullet and begin selling a branded and customized printer built overseas.

When you can get a decent (but let’s be clear, not great) 3D printer for $200 USD, it’s no surprise that American and European manufacturers are having a hard time staying competitive. But not everyone is …read more

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Delta Printer Morphs into CNC Flat Coil Winder

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Anyone who has ever wound a coil by hand has probably idly wondered “How do they do this with a machine?” at some point in the tedious process. That’s about when your attention wanders and the wire does what physics wants it to do, with the rat’s nest and cursing as a predictable result.

There’s got to be a better way, and [Russ Gries] is on his way to finding it with this proof-of-concept CNC flat coil winder. The video below is a brief overview of what came out of an intensive rapid prototyping session. [Russ] originally thought that moving …read more

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Delta and Sears suffer data breach, credit card information compromised

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US-based Delta Air Lines and Sears Holdings, the owners of Sears and Kmart, have announced that the breach suffered by chatbot company [24]7.ai has resulted in the compromise of credit card information of its customers. According to a statement by [24]… Continue reading Delta and Sears suffer data breach, credit card information compromised→