Nice job! It's always so satisfying to design and make something that is a usable thing vs just another remix of a benchy.
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And here's your gun
Most guns shows have FFL dealers on site. Those guys are definitely running the federally and state required background checks in a little room in the back somewhere. And if the sale happens inside the building, it's even highly likely private sales get run through also, (you will pay for it-- someone has to make money off of it). The Paperwork Gods must be appeased no matter what.
But depending on the state/county/city often you can do a private sale in the parking lot with someone that doesn't get the check. This is not universal across all 50 states. Some states, like California require all firearms transfers to go through a licensed FFL.
YMMV
I wish him good luck in this endeavor.
The "flu shot" tends to be variable in it's effectiveness from year to year. It's a guessing game the CDC play with those virii. They are/were trying to guess what the vaccine needs to be months in advance. This year it seems they missed a bit and it didn't work quite as well.
The future seems bleak on having those shots available for the foreseeable future.
And what about Qidi? Everyone misses this brand. But they offer some well priced core xy printers with features no one else does. And the ability to print high end engineering filaments right out of the box.
Even non-profits need to make a profit somehow. They have operating expenses and need to build a cash cushion much like a for profit business.
Now, Prusa is and always has been a privately owned business and Josef wants to makes money, got to keep the lights on somehow and pay his employees you know. So Prusa is a normal business with a generally "Do no Evil" company outlook and the constraints of trying to be a successful business in the EU.
And despite the higher price that gets forced by trying to operate in the EU, this should make Prusa a more desirable place to do 3D printing business for all those who want to be socially responsible over another very popular brand based in China. But, evidently a cheaper price cuts a lot of slack for most.
Full disclosure: I own a Prusa Mk3s and a Bambu Mini.
There are recognized standards for piping and plumbing around the world. Which one do you use?
The issue is the longevity of the stuff. It lasts for decades and even generations. And over that time period we change the standards as new ideas and materials come into play. As a home owner, I have had to adapt new standards to nearly 100 year old standards. I've owned houses that had clay, cast iron, copper, galvanized steel, and pex randomly shotgunned into the house as every previous owner had done changes over time.
It would be nice it all piping and plumbing as identical around the world, but it ain't gonna happen, (and don't at me with the "metric would solve all that." Are you talking DIN or JIT or even what ever BS the Chinese are doing today).
If you look at the wavy lines around the inlay, that's ringing. It has to do with resonances in the printer itself. The latest hotness to get some control of this type of artifact is called input shaping. On newer printers, like the Bambu, they have an accerometer built into the printer. (And my Bambu mini will do that resonance test EVERY new print-- until I commented it out. It's not needed that often).
Since you are running klipper, you can do input shaping adjustments quite easily. Do NOT GUESS at values. You can damage your printer that way. The documentation is very good to try and help with making improvements. You may also want to re-adjust your Acceleration after you do the resonance testing. In fact I highly recommend you run all these tests after you build an enclosure for your printer. For your extra large prints, cooling and layer time can become quite important also to prevent warping.
This person should probably have watched this video first that posted here yesterday. 80% infill seems to be about the break even point for the biggest gains. No 100% infill really needed in the real world of FDM.
Something, something, 80% rule strikes again and just because you can do something doesn't mean you should.
The mini's are the latest new hotness for desktop computing. I've been running a dirt cheap $90US, mini for 2 years now. It fits extremely well on my desk, just tucked in under the monitor leaving plenty of room for all the other tasks I do daily.
Will it play the latest hot new video game? Nope. But it will run OnlyOffice, FreeCAD and FreeDoom just fine.
Toss in slamming someone in a diplomatic meeting is done with a lot different language than on the street corner and yelling "In your face!"
I switched my trusty old Mk3s+ over to klipper a few weeks ago. It was even easy enough to add an accelerometer for input shaping too. While still not as fast as the Bambu mini sitting next to it, I have increased the printing speed to 70mm/s to 90mm/s for quality prints. And I can achieve a bit over 100mm/s print speeds with a small drop in quality.
It will give the old girl more years of useful life.
The Bambu printers are quite locked down. So you are only getting the functionality they want you to have. So the Core One, (Marlin) or Qidi, (Mainsail and klipper), might be your best choice. Crealty seems to be improving with their new models. But their past history makes me very leery yet. I lean to Prusa because I've owned one for 5 years now and they still support it. Customer support is valuable to me and worth the extra cost in the purchase price.
My A1 mini when you look at the printer settings, on the first screen, under g-code flavor, says Marlin(legacy). It's not even Marlin 2. Plus it's locked so you can't even change it something like marlin 2 or klipper.
Bambu and Prusa both run Marlin. So there is no klipper to be had there. If you insist on klipper, you might want to check out the Qidi Tech Plus 4. It should tick all the boxes you are looking for. And Qidi says they are coming out with their own version of the AMS for the Plus 4 called the Qidi Box sometime this first quarter. Whether they hit that target date or not, I cannot say.
I haven't used an abacus in a very long time, but I haven't forgotten how to use one. I still have a slide rule that I can still use if I have to, (I come from a time before pocket calculators). I used to race the the younger kids in my classroom to see who could do simple math problems faster-- me and the slide rule or them and a calculator. And my rule in class was that there were no calculators. Well, using fingers was acceptable. Because I wanted you to get your hands dirty playing with the numbers. If you wanted a calculator for a test, I would offer you a slide rule.
As a working adult, you must be proficient will the tools your occupation has. And not just the tools you wish you have. If you are running servers in a Windows based environment, it doesn't do you any good to wish for Linux based servers. And you better be good with both Windows and Linux if the environment is mixed. And a professional doesn't complain about their tools, they just use the ones they have to accomplish the job at hand. Of course, if you have the money and power to do the choosing and purchasing of the tools you prefer and want, then by all means buy them. But I doubt that's the case for you.
Perhaps. But despite using Windows, you got the job done, right? Life is all about using the tools do have, rather than the ones you wished you had.
"an enthusiastic emacs user" Well, there's your problem! (Sorry, I couldn't resist the poke)
To be serious, Windows and that mouse are just tools-- same as any Linux distro is. A means to an end. Nothing more. There is nothing to be miffed about when you need to use that tool. Be proficient with all your tools. And when you need to use a tool, don't be concerned about comparing it to the other tools. It diminishes you skills with that tool and and offers no gain to the solution.
I used to teach math in the local school. The kids had a great interest in 3D printing because I had a few fun items in my classroom that I had 3D printed. I decided to spend a couple of weeks teaching a bit of CAD through having the kids spend it designing a personalized key chain to print.
It took me 3 days of class time to teach them how to use a mouse.......They couldn't grasp the idea that a touch screen and CAD don't go together, you need that mouse to make it work. It quickly became apparent that things quickly became difficult for them if it doesn't have a touch screen.
And while some classes are always a bit better than others, there was always a noticeable number of them that struggled with using a mouse.
Openscad is fine for pretty basic one item things. It's not so good for complex designs like the model steam engines I sometimes amuse myself with. And it's sure not capable in a commercial setting.
But if you enjoy openscad and writing code, more power to you and enjoy what you are doing with it!