• 27 Posts
  • 511 Comments
Joined 1 year ago
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Cake day: July 23rd, 2023

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  • It depends on your prescription, the material you choose, coatings and such. The shape of the lenses or the type of beveling have no impact on the price, unless they’re highly curved with a step bevel for instance.

    My lenses are standard polycarbonate lenses with a basic scratch-resistant coating. But I have astigmatism and I need progressives, so the lenses come out at $400. And usually I also order a pair for far and near (not progressive) and they’re like $200 per.

    That’s the only problem with the registration tabs in my design: it requires notching the bevel of the lenses - meaning you have to work up the courage to bring a file to brand-new lenses you just paid a sizeable portion of your last paycheck for 🙂



  • It depends on the material and printer and the orientation of the hole. Vertical holes (or up to 20 degree from vertical if they’re angled) are the most accurate because you basically exploit the printer’s X and Y locating abilities. Horizontal holes will always end up ovalized because horizontally they’ll be correct, but vertically they can only have a dimension that’s a multiple of the layer height.

    With the aforementioned Prusa Mk4 printer and PLA, all the vertical small holes I print usually end up under ±0.05mm / 0.002" from the desired diameter. If the dimension is very important (for example, holes for a pogo pin holder that needs to fit with interference, otherwise it would fall off) I’ll print it 0.1mm / 0.005" undersized and then I’ll ream the hole just enough to get the proper fit. It’s quick but not as quick as not reaming the hole obviously 🙂

    Note that our printer is in a closed enclosure and that seems to make a difference for repeatability: if I leave the doors open, the diameter of the final hole varies a bit more. Nor a lot more but noticeably.








  • At this point, I think China is well known for infiltrating local businesses and forcing them to sell networking gear with trojans.

    The US is better known for surveilling people indirectly by exploiting corporate surveillance data collected by big tech monopolies doing their bidding for them and by directly “tapping the line”. I don’t think US officials asking US companies to compromise their products and keep quiet about it would fly in the US. At least not yet. But I wouldn’t put it past them either.

    To be honest, of all three, I’d rather purchase something made in Europe, even for a premium.













  • Well, I know it’s all going through the internet anyway nowadays, so yeah it’s technically always voice-over-IP even if I use the cell network. The only difference between normal calls and WiFi calls is how it connects to the internet really. I just don’t want the extra baggage that comes with staying connected to the cell netowk method of getting on the internet.

    And of course what I referred to when I said VoIP is pure VoIP providers that sell you a number and access to a SIP server, independent from your cellphone provider.