I mean, there is a hard limit on how much info your brain can take in. It’s time. Every hour spent learning one thing is an hour not spent learning everything else.
I mean, there is a hard limit on how much info your brain can take in. It’s time. Every hour spent learning one thing is an hour not spent learning everything else.
Came here to effectively say this. If we were people in 1820’s Germany, 99% of us wouldn’t have nearly enough spare time to even think about cataloging those beetles.
Libre Office
Others have pointed out the degradation issue, but you’re also assuming that all plastics are thermoplastics. They are not. There’s huge variation in chemical composition and material properties between different plastics, and most of them can’t be melted and reformed.
I don’t know about the regulatory side, but Boeing gutted their experienced engineering corps starting about 10 years ago. In the pursuit of profit of course. I think we’re seeing the effects of that finally coming to the fore.
My understanding of the role of the regulatory agencies for stuff like this is that they can ground a model of plane if they believe there’s a systemic issue. Like we saw with the MAX.
That sounds like a problem from using too small of a drive. Every torque curve I’ve seen for brushless DC or AC servos is constant torque from 0 to about 75% rated RPM, and then starts to drop off.
Well, that’s why you use a proper servo drive. Yes, technically they oscillate at standstill, but it’s so little it literally does not matter. Closed loop servo control is a solved problem unless you’re trying to implement it yourself.
I don’t know why you’re getting down voted. You’re correct, steppers are used due to cost.
I disagree with all your points. What kind of servos are you talking about?
BLDC and AC servos maintain full torque at stop too, and have about 2-3× the torque of a stepper of similar size.
The only way a stepper can rival a servo for precision is with a high degree of microstepping, which is far from guaranteed positioning with open loop control.
I haven’t directly compared response time between steppers and servos, but I would be extremely surprised if there’s a significant enough difference to worry about. Most servo-controlled machines are larger and so are designed to accelerate slower than a printer, if that’s what you mean. This is intentional because inertia is a thing you have to worry about, not because the servo reacts to command changes slowly.
There are valid reasons steppers are used on printers, but it’s not because they have superior performance.
Cost is the short version, yes.
I don’t know what kind of servos everyone here is talking about that are less precise than open loop steppers. Low quality hobbyist stuff, I guess? Proper servo motors & drives are the standard for good reason for robotics, industrial CNC machines, and pretty much everything else that needs powerful motors with high precision. Much higher power density, higher RPM (good for increasing torque with a gearbox), equivalent or better precision, plus closed loop control is a huge capability and safety gain.
That said, good, industrial quality servo motors are 1) expensive and 2) aren’t made in small enough sizes to be comparable to the steppers on most 3D printers. Even the smallest industrial servo + drive I’ve seen is about 5x as big as the steppers on a personal 3D printer and costs $800ish. Obviously, both are deal breakers for a personal 3D printer.
3D printers are a fairly ideal application for steppers. The moving parts are small and light, meaning you both don’t need a large motor and the danger of slippage is lower. Plus, steppers are cheap.
Agreed. Don’t make a threat - just make the GDPR complaint. Inform the company if you want. How many times have you remembered to follow up on one of those threats to see if you should still make a complaint?
It’s not infantilization. These bills are designed to prevent “one more hoop” design by the company to make it too annoying to unsubscribe. Your position assumes good faith behaviour by the company with the newsletter. That is absolutely not a given.
I don’t disagree that the people with money who are funding this kind of development don’t care about regulations or safety.
That said, the idea that they’ll do it out on the open sea or in space are absolutely laughable. Those ideas pitched so far completely ignore all the obvious engineering problems. Not to mention that going to international waters to avoid regulations means that the navy of that country you’re thumbing your nose at now has free reign on you.
In other words, AGI is what every layperson thinks of when people talk about AI. It’s (sort of) what you see in the movies.
LLMs, and every other AI technology we currently have, do not actually have any form of intelligence. They’re called AI because the sub-field of computer science that they arose from is called AI, and has been for decades.
In any industrial context, a “robot” is short for robotic arm. Those things you see in footage of automotive factories.
They also don’t have any kind of AI. It’s just a regular (if specialized) computer in control.
Came here for this, thank you for your service.
“Just stop considering it scandalous” is a severe lack of imagination. Even if/when the stigma of “having a sex life” is gone, the great majority of people consider their sex life to be private. Video floating around that looks like you having sex is a very different thing to hearsay rumors.
Keep in mind that the exact same techniques could be used to sabotage adult relationships, marriages, careers, just as easily as teenage bullying. This isn’t a problem society can shrug away by saying sex should be less stigmatized.
That analogy relies on the reader having any idea what wire EDM manufacturing is. ;) Not exactly an everyday topic.
You can very safely remove the “probably” from your first sentence.