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You Bring It, This Blings It: Retrofitting A Hot Foil Stamping Machine

March 31, 2018 by 15 Comments

Hot foil stamping is a method often used to embellish and emboss premium print media. It’s used on things like letterhead and wedding invitations to add a touch of luxury. The operation is actually quite simple, where a custom die is heated, pressed into a heat transfer foil, and then transferred on to the print media. Some of the very first manuscripts used gold leaf embossing to decorate intricate calligraphy. You can also see it often used to decorate the sides of religious texts.

Professional foil stamping machines are often pricey and the cheaper ones you can get from eBay are usually poorly made. [Lindsay Wilson] found this out when he purchased a low-cost hot foil stamping machine that was too difficult to use reliably. It got shelved for years until he had another hot foil stamping project. This time he was prepared. He took the machine apart and robust-ified it by attaching it to a heavy-duty arbor press. He also retrofit the heating assembly with his own temperature controller to improve the accuracy for the foils he wanted to use.

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Oracle V Google Could Chill Software Development

March 30, 2018 by 96 Comments

Unless you’ve completely unplugged from the news, you probably are aware that the long-running feud between Oracle and Google had a new court decision this week. An appeal court found that Google’s excuse of fair use wasn’t acceptable and that they did infringe on Oracle’s copyrights to Java. Oracle has asked for about $9 billion in damages, although the actual amount is yet to be decided. In addition, it is pretty likely Google will take it up to the Supreme Court before any actual judgment is levied.

The news is aimed at normal people, so it is pretty glossy about what exactly happened. We set out to try to make sense of it all. We found a pretty good article from [Michaela Barry] about what the courts previously found.  There were three main parts:

  • There were 37 API (Application Programming Interface) declarations taken verbatim from Java. This would be like a C header file if you aren’t familiar with Java.
  • Google decompiled 8 security files and used them.
  • The rangeCheck function — 9 lines of Java code — were exactly the same in Oracle’s Java and Android.

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Super-Blue CNC Part Fixturing

March 29, 2018 by 20 Comments

Simple clamps are great if you need to keep the pressure on two parallel surfaces, but if you have an irregular plane, or you need to cut through it, clamps are not the correct tool. The folks at [NYC CNC] feature a video with a clever hack borrowing from other disciplines. Painters tape is applied to the top of a level mounting surface in the machine and then burnished. The same is done to the bottom of the workpiece. Superglue is drizzled between the tape layers and pressed together so now the stock is held firmly below the toolhead.

Some parts are machined in the video, which can be seen below, and the adhesion holds without any trouble. One of the examples they cut would be difficult to hold without damage or stopping the machine. The accepted wisdom is that superglue holds well to a slightly porous surface like tape, but it doesn’t like do as well with smooth surfaces like metal. Removing residue-free tape at the end of a cut is also cleaner and faster than glue any day.

If you have yet to cut your teeth, you can watch our very own Elliot Williams getting introduced to CNC machines or a portable machine even a child can use.

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LED Strips Are So Hot Right Now

March 23, 2018 by 111 Comments

Sometimes there will appear a figure that flies in the face of reason, and challenges everything you think you know about a subject. Just such a moment came from [Chris Taylor] at Milton Keynes Makerspace when he characterised a set of LED strips, and the figure in question was that he found an LED strip creates the same amount of heat as its equivalent incandescent bulb.

We can hear your coffee hitting the monitor and your reaching for the keyboard to place a suitably pithy comment, because yes, that’s a pretty unbelievable statement. But it’s no less true, albeit that the key to it lies in its details. If you have a 100 W incandescent bulb, 88% of the energy is radiated as light and infra-red, leaving 12 W heating the bulb itself. To get the same light output from an LED meanwhile we’d only need 17 W, of which 11.9 W would be left to heat the LED. Which means that an LED strip can get as hot as an incandescent bulb with equivalent light output, and he’s run some tests to prove it.

If you’ve worked with LEDs, you’ll know that they get hot. But to learn that they have the potential to get as hot as their incandescent equivalents is something of a eye-opener, and should demonstrate the need for adequate thermal mitigation. It’s easy to take them for granted, and we’ve taken a look before at some of their safety pitfalls.

Disclosure: [Jenny List] is a member of MK Makerspace.

Uber Has An Autonomous Fatality

March 20, 2018 by 266 Comments

You have doubtlessly heard the news. A robotic Uber car in Arizona struck and killed [Elaine Herzberg] as she crossed the street. Details are sketchy, but preliminary reports indicate that the accident was unavoidable as the woman crossed the street suddenly from the shadows at night.

If and when more technical details emerge, we’ll cover them. But you can bet this is going to spark a lot of conversation about autonomous vehicles. Given that Hackaday readers are at the top of the technical ladder, it is likely that your thoughts on the matter will influence your friends, coworkers, and even your politicians. So what do you think?

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All Your IPhone Are Belong To Us

March 19, 2018 by 46 Comments

Apple’s commitment to customer privacy took the acid test after the San Bernadino shooting incident. Law enforcement demanded that Apple unlock the shooter’s phone, and Apple refused. Court cases ensued. Some people think that the need to protect the public outweighs the need for privacy. Some people think that once they can unlock one iPhone, it won’t stop there and that will be bad for everyone. This post isn’t about either of those positions. The FBI dropped their lawsuit against Apple. Why? They found an Israeli firm that would unlock the phone for about $5,000. In addition, Malwarebytes — a company that makes security software — reports that law enforcement can now buy a device that unlocks iPhones from a different company.

Little is known about how the device — from a company called Grayshift — works. However, Malwarebytes has some unverified data from an unnamed source. Of course, the exploit used to break the iPhone security is secret because if Apple knew about it, they’d fix it. That’s happened before with a device called IP-box that was widely used for nefarious purposes.

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3D Printer Halts And Catches Fire — Analysis Finds A Surprising Culprit

March 18, 2018 by 144 Comments

Let’s build a robot that gets hot. Really hot — like three times hotter than McDonald’s coffee. Then make it move around. And let’s get the cost in at around $100. Sounds crazy? Not really, since that describes the cheap 3D printers we all have been buying. [John] found out the hard way that you really need to be careful with hot moving parts.

The short story is that [John’s] Anet A8 caught on fire — significantly caught on fire. Common wisdom says that cheap printers often don’t have connectors for the heated bed that can handle the current. There have been several well-publicized cases of those connectors melting, especially on early production models of several printers. However, this printer had an add-on heater with a relay, so that shouldn’t be the problem. Of course, a cheap power supply could do it, too, but the evidence pointed to it being none of those things.

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