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Cake day: July 18th, 2023

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  • I had one done recently due to breaking a filling while eating a Jolly Rancher. The whole thing took maybe 2 hours.

    The shot of novocaine to numb my jaw was the only pain, and even that wasn’t bad because the dentist used topical numbing before that. It was no different than getting a cavity filled.

    My dentist has a cnc machine (CEREC) in the office to make the crown, so I didn’t need a temporary cap. Waiting for that to be milled was the longest part.

    I had a bruise on my gums for a couple days from the shot and the retainer clamp, but it wasn’t even bad enough to stop me from eating.



  • darkmarx@lemmy.worldtoDIY@slrpnk.netDrawer Slides
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    4 months ago

    The silver things are runners with ball bearings that drawer slides on. The slides that attach to the drawer will snap into these silver runners.

    Usually, you just need to align the slides on the drawer with the runners and push. They should snap in. The runners tend to slide around while connecting them. If they slide to the back, it’s ok, they will still connect once you get them lined up and push the drawer into them. If you can reach from underneath, you can hold the runner in place while attaching the drawer. Do one side at a time.

    If you’re struggling to get it to connect, I recommend removing the slide from the side of the drawer and seeing if you can get a single slide to attach to the runner. It will click when it attaches. By doing just one, you might have an easier time seeing how it connects.

    Once you figure it out, you’ll need to disconnect it. There should be a little plastic lever that you hold down (or up, depending on the side) while you pull out the slide. Put it back on the drawer and see if you can connect it once it’s back on the drawer.

    They are a little complicated, but once you see how it goes together, it should make sense. If what I said is still confusing or if you are still struggling, reply and I’ll see if I can get some pictures to explain it better.

    • Edit: A common mistake I’ve seen is putting the slides on the drawer backwards. The part attached to the drawer should have the flat part against the drawer. The drawer should look like this ]|_______|[


  • AC as refrigerant, not coolant. Although that might be semantics.

    AC is a type of heat pump. You are moving heat from inside to outside. The physics behind a heat pump, is fairly simple. There are three principles to work with.

    1. Take a gas, compress it, and it gets super hot.
    2. Take a compressed gas, let it rapidly expand, and it gets super cold
    3. Different temperature gases move from hot to cold

    Let’s focus on AC since most folks are used to that concept. In an AC, you have a closed loop of refrigerant. Outside, there is a compressor that compresses the gas, which makes it very hot. The gas is pushed through a radiator with a fan pulling air through it. Since hot moves to cold, the heat trapped in the gas moves to the outside air, and the gas is slightly cooled. (As long as the gas is hotter than outside).

    Inside, there is an expansion valve that lets the gas rapdly expand, making it super cold. It is pumped through a radiator that has inside air blowing over it with a fan. Since hot moves to cold, the heat in the inside air moves to the cold gas, cooling the inside air. (As long as the gas is cooler than the inside temperature). It is then pumped outside to start the loop again.

    So, inside gets cooler while the heat is moved outside. The physics also establishes the limits of the heat exchange. You will only grab heat from inside if the expansion makes the gas colder than the air inside. Typically it expands to around 0 degrees. Likewise, it will dump the heat outside if the gas is hotter than outside air. The compressor typically makes it 130 to 140 degrees (temps vary depending on many factors).

    To use a heat pump for heating rather than cooling, reverse the process. Pick up the heat from outside and dump it inside. This will work as long as outside is warmer than the expanded gas (0 degrees or so). Although you can get some that go to around -20.