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Cake day: August 15th, 2023

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  • Fake or outdated info, actually. While this is a small tangent, I make it a habit to review basic, introductory information on a regular basis. (For example, I’ll still watch the occasional 3D printer 101 guide even though I could probably build one from scratch while blindfolded.)

    I have been in IT for a very long time and have branched out into other engineering fields over the years. What I have found, unsurprisingly, is that methods and theories can get outdated quick. So, regularly reviewing things I consider “engineering gospel” is just healthy practice.

    For the topic at hand, it doesn’t take much misinformation (or outdated information) to morph into something absolutely fake, or at best, completely wrong. It takes work to separate fact from fiction and many people are too lazy to look past internet pictures with words, or 15 second video clips. (It’s also hard to break out of believing unverified information “just because that’s the way is”.)






  • That wasn’t much of a pay wall.

    Billionaire Larry Ellison says a vast AI-fueled surveillance system can ensure ‘citizens will be on their best behavior’ Kenneth Niemeyer Sep 15, 2024, 10:06 AM MDT

    Walking down a suburban neighborhood street already feels like a Ring doorbell panopticon.

    But this is only the start of our surveillance dystopia, according to Larry Ellison, the billionaire cofounder of Oracle. He said AI will usher in a new era of surveillance that he gleefully said will ensure “citizens will be on their best behavior.”

    Ellison made the comments as he spoke to investors earlier this week during an Oracle financial analysts meeting, where he shared his thoughts on the future of AI-powered surveillance tools.

    Ellison said AI would be used in the future to constantly watch and analyze vast surveillance systems, like security cameras, police body cameras, doorbell cameras, and vehicle dashboard cameras.

    “We’re going to have supervision,” Ellison said. “Every police officer is going to be supervised at all times, and if there’s a problem, AI will report that problem and report it to the appropriate person. Citizens will be on their best behavior because we are constantly recording and reporting everything that’s going on.”

    Ellison also expects AI drones to replace police cars in high-speed chases. “You just have a drone follow the car,” Ellison said. “It’s very simple in the age of autonomous drones.” He did not say if those drones would broadcast the chases on network news.




  • All good! It’s the same situation as I described and I see that increasing temps did help. It’s good to do a temperature tower test for quality and also a full speed test after that. After temperature calibration, print a square that is only 2 or 3 bottom layers that covers the entire bed at full speed or faster. (It’s essentially a combined adhesion/leveling/extrusion volume/z offset test, but you need to understand what you are looking at to see the issues separately.)

    If you have extrusion problems, the layer line will start strong from the corners, get thin during the acceleration and may thicken up again at the bottom of the deceleration curve. A tiny bit of line width variation is normal, but full line separation needs attention.

    Just be aware if you get caught in a loop of needing to keep bumping up temperatures as that starts to get into thermistor, heating element or even some mechanical issues/problems.


  • I suppose you are correct. If the bit isn’t structural, it doesn’t need to pass any test for microcracks. If it is structural and it passes testing, YOLO that shit.

    It’s just the core frames that need serious attention though. I don’t think I have been around a single aircraft that wasn’t constantly bleeding some kind of fluid, so everything else not related to getting the thing in the air and keeping it from completely disintegrating while in flight is mostly optional. (I am joking, but not really. Airplanes hold the weird dichotomy of being strangely robust and extremely fragile at the same time.)


  • And there are significant technology differences. The new upgrade will be the B-52J or K.

    Proper aircraft maintenance cycles are intense, so it would surprise me if any of airframes we use now have 1952 original parts. Aircraft are subject to lots of vibration and the aluminum in B-52s will eventually stress-crack because of it. (It wouldn’t surprise me if composites were added in many places instead of aluminum replacements, but that is just speculation.)

    Also during those maintenance cycles, it’s much easier to do systems upgrades since the aircraft is basically torn down to its frame anyway.

    It’s the same design to what we had in 1952, but they ain’t the same aircraft, philosophically speaking.









  • 185C is cold for PLA. It may work for slow prints, but my personal minimum has always been around 200C and my normal print temperature is usually at 215C.

    Long extrusions are probably sucking out all the heat from the nozzle and it’s temporarily jamming until the filament can heat up again.

    Think of the hotend as a reservoir for heat. For long extrusions, it will drain really fast. Once the hotend isn’t printing for a quick second, it will fill back up really fast. At 185C, you are trying to print without a heat reservoir. I mean, it’ll work, but not during intense or extended extrusions.