You can very safely remove the “probably” from your first sentence.
You can very safely remove the “probably” from your first sentence.
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.
Libre Office
*Thinnest and yet roughest. Not thick enough to be a barrier, and it can rub you raw to provide an entry point at the same time!
“Sealed” is also a vague suggestion with HVAC. Every ducting join, every piece of equipment, all of it leaks. I shudder to think how much heating/cooling is wasted that way.
I kind of disagree with you, in that when I think about the standalone meanings of the words in each phrase, I think they do say the same thing.
The meaning of the words “You are welcome [to the help I gave you]” implies, to me, that there wasn’t actually anything to offer thanks over. You’re acknowledging their thanks, but telling them that they are welcome to take/use whatever it is you’re talking about. [EDIT: normally when someone tells me I’m welcome to something, I feel less compelled to ask and thank in the future. “You’re welcome to anything in the fridge”, for example.]
It does not imply, to me, that I would appreciate them returning the favour. That might be implied meaning in the phrase, but it’s definitely not what those words mean by themselves.
In any case, “You’re welcome”, “no problem”, “no worries”, etc… are all idioms that mean something different than what their individual words mean. The phrases as a whole carry a different meaning than the words themselves suggest.
I like that you pointed out industrial equipment. Those evaluations are usually pretty intense, and that’s within a very controlled environment.
Rule #1 of automation in my experience is: limit the scope of what you’re automating. Control as many variables as you can, make the requirements very specific. Every feature or situation or capability you add increases the difficulty exponentially.
Self-driving vehicles on the open road in the real world is an inherently unbound problem. The scope is nearly limitless. Good luck.
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.
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.
Did you tell him you guess you have to stop doing non-web development then? Clearly you’re not qualified if you can’t have the corresponding title.