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Compared to plastic 3D printers, metal 3D printing ones are at minimum 100x more expensive, if not 1000x or 10000x.


Any time I see a guide like this, everyone will go on and on about the types of cutters, toolpaths, speeds & feeds, etc. but will always gloss over work holding. For every action, there is an equal and opposite reaction. Without reaction forces, the best cutter in the world is useless. A sizeable chunk of your tooling will just be clamps and indexing tools needed to align and secure the thing you're CNCing, while also trying to keep them out of the work area. 80% of the end mills I've ever broken have been by crashing them into a clamp or vice by accident. This is another thing you tend not to see in 3D printing or laser cutting, or plasma cutting for that matter.


I didn’t know soft jaws were a thing until I started working. Even in college, they just teach you to hold the part up with spacer plates and crank the vise. One of the vendors I worked with was explaining why 4-5 pieces cost the same as 1 piece. The time and effort to make multiple jaws for each operation is the time consuming and expensive part.



I've switched from clamps to painters-tape-and-superglue and it's been great. Only for holding, not for indexing.


The wick is wound in such a way so that as more of it is exposed, it curls over and burns up, thus stopping it from getting too long.


How do you wind it that way? Are there patents or textbooks that explain how to do it? How did you find out yourself? Have you been able to do it?


These people are still out there. When I was in high school we had the normal people, then people who took advanced placement stuff, then the "super nerds" who were at the top of all the advanced placement stuff with perfect grades, and then there was this one guy who was most of the way through all the advanced math classes at the nearby university. Same guy was in one of my English classes, and was failing. More or less he couldn't be bothered.

Sadly the later part of your comment may hold - I don't remember what ended up happening with him, whether he graduated high school or what. Hopefully at that level you just disappear into academia and not off the face of the earth in general.


I thought myopia has a significant environmental component, eg doing most of our development indoors instead of outside in bright sunlight?


Myopia is considered a highly heritable condition. See sources 12-17 on this paper as a starting point https://pmc.ncbi.nlm.nih.gov/articles/PMC8947159/#B12-childr...

That does not mean that there is no environmental factor, but it does mean there is a genetic factor.


Equally intriguing, I've noticed that most fridges have the hinge on the right.


Most single door fridges are setup so that the hinges are reversible to invert the door opening direction. If you look at the top/bottom edges of your standard refrigerator you will likely see the pre-drilled mounting holes to invert the hinges, covered with decorative caps or stickers or something.


Not sure why people keep making this argument. If I'm obscenely rich and don't want to follow the rules, it's at least an order of magnitude cheaper and easier to have something on earth than mars. Buy a country or two, or set up a floating city in international waters. The challenges involved in each are peanuts compared to somewhere which has no breathable air.

Mars is cooler though, I'll give you that one.


If you're somewhere with no breathable air, and control the access to Oxygen, everyone else who was dumb enough to sign up to this trip is now under your complete control. That's what it's about.


It will always be infinitely amusing that Musk has gone from a walking-on-water Nerd Jesus to a mustache-twirling Bond Villain on this site in the course of a year.


Eh, the cracks started showing a bit back in 2018 when he baselessly defamed a rescue worker as a pedophile. The slide's longer than a year.

I'm still a huge SpaceX fan, despite it all.


His behavior, especially recent ones, has soured my view of all of his endeavors. I'm saddened by that fact.


Unrealistic. There are far too few ads in between paragraphs.


Also the paragraphs needs those arbitrary phrases which have been turned into links to purchase a vaguely-related product with a referral code.


And the text actually needs to be a collection of chatgpt-style bulleted lists between h1 headers


I suspect LLMs will lead to an increase in bullet-point lists from humans, simply because there's no point writing well when the audience assumes it was ghost-written for you.



What are all those Unknown JSC Vimpel objects in that one well-defined orbit between LEO and geostationary?


Two separate breakups that have been reported by Russians. Given the age and lack of regular tracking I have them listed as a very low confidence on the accuracy of the exact current location.


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