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Joined 1 year ago
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Cake day: June 25th, 2023

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  • Is it alright to go around wiping the OS off of other people’s computers?

    • is what your comment reads like to me.

    To be clear: each machine generally needs a computer to be permanently plugged into it. Generally the computer belongs to the university. You’re not plugging in your own personal laptop into the machine. Saying to install Linux on these computers is essentially tampering with the university’s electronics and IT will be very unhappy that you did that.




  • Contramuffin@lemmy.worldtoScience Memes@mander.xyzLaunches
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    5 days ago

    That’s the thing - in space, orbits don’t decay. Orbital decay only happens if there’s dust or atmosphere that you bump into along your orbit to slow you down. But in interplanetary space, there’s no dust or atmosphere, and certainly not enough to decay your orbit fast enough to achieve results (otherwise, the Earth would have already decayed and melted in the Sun)

    You need to spend fuel to lower your orbit to hit the Sun, and you need to spend fuel to raise your orbit to escape the solar system. It turns out to be really freaking difficult to hit the sun because it simply requires so much fuel to lower your orbit enough to hit the Sun.














  • You can’t outright, but you can at least try to minimize your exposure. Easiest way is to avoid buying products that use plastic packaging, especially if the product that you’re planning to buy is food. Don’t microwave plastics, even the supposedly “food safe” one - that releases a ton of microplastics into your food. Don’t order takeout - again, lots of plastic in the containers. Even paper food containers contain a plastic coating.

    Don’t touch receipts, especially with wet hands. Or at minimum, wash your hands thoroughly after touching it


  • I find that it’s best to use 65C for the bed temperature for the first couple of layers, and then drop the temperature to 50C. If you’re using Cura, there should be an option to do that, but you’ll need to dig through the advanced settings to find it. Doing this has completely solved warping for me (Ender 3 Pro v1 with PLA filament). My understanding is that it works because the temperature differential between the top and bottom layers causes a pulling force that causes the warping that you see. I think it’s something about the expansion of the plastic due to heat - as the plastic cools down, it shrinks, which pulls the layer below it upward. The wider the base, the stronger the pulling force. And the more layers you add, the more the pulling force compounds, until eventually the print warps.

    The solution is simple - minimize the temperature differential. You really only need it to be hot on the initial layer, for the print to stick properly. And afterward you only need to maintain a temp that’s just hot enough that the print doesn’t pop off. Hence, 65C initial, 50C for everything else afterward

    Probably less relevant, but I also find that adhesion improves if you have the printer go at half speed for the first couple of layers. Again, there should be a setting in Cura, but it’s in the advanced settings

    I find that I can just use these 2 modifications and everything just works. No need for glue. I just dust off the bed when it gets dusty but beyond that, I don’t mess with it. Actually, the adhesion is quite strong. Even after the bed has cooled to room temperature, I have to exert a bit of force to pull the print off the bed