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  • 9 Comments
Joined 3 years ago
Cake day: July 19th, 2023
  • Aarrodri@lemmy.worldtoAsklemmy@lemmy.ml•Tell me about when you saved someone's life
    37·
    3 days ago

    My distant aunt and uncle got murdered in a horrible robbery. They had a daughter…my cousin. We hanged out as kids but lost touch until this event. A couple of weeks after the funeral I decided to call her to see how she was holding up. We chatted for a long time and she thanked me for checking on her. Months later she told me she was a few seconds away from suicide when I called called her that time… And our random conversation changed her approach to life.

  • Aarrodri@lemmy.worldto3DPrinting@lemmy.world•(UPDATE: a different issue??) What are these burn marks on my failed 3D print?English
    41·
    5 days ago

    I have been printing more than a decade and have not seen this. But I suspect a clog? Then the filament burns inside and eventually comes out all chared? Or temperature control issues where you nozzle gets way too hot for short times? Just guessing here …

    Edit: did some searching:

    Burn marks on 3D prints usually appear as black or brown specks, streaks, or burnt blobs. They are primarily caused by melted plastic accumulating on the outside of the nozzle, gaps in your hotend causing filament to leak and cook, or a printing temperature that is simply too high.1. Clean the Outside of Your NozzleOften, small amounts of plastic cling to the hotend during printing. Over time, this filament cooks, oxidizes, and drops off onto your print.How to fix: Heat up your hotend to your printing temperature and carefully scrub the exterior of the nozzle and heat block with a small, brass wire brush.

    1. Clean the Outside of Your NozzleOften, small amounts of plastic cling to the hotend during printing. Over time, this filament cooks, oxidizes, and drops off onto your print.How to fix: Heat up your hotend to your printing temperature and carefully scrub the exterior of the nozzle and heat block with a small, brass wire brush.

    2. Check for Hotend Leaks (Loose Nozzle)If melted plastic is seeping out from the threads above the nozzle, it will slowly burn and periodically drip into your model.How to fix: Heat the hotend to at least 250°C. Hold the heater block with an adjustable wrench, and use a socket wrench to tighten the nozzle firmly. The goal is to make sure the nozzle sits completely flush against the heatbreak (or the PTFE tube on non-all-metal hotends).

    3. Lower Your Printing Temperature

    4. Remove Internal OxidizationIf you’ve recently switched from a dark-colored filament to a light-colored one (like white), residual burnt plastic from the dark filament can linger inside and randomly appear.How to fix: Manually extrude 10-20 cm of the new light filament through the hotend at a slightly higher temperature to push out all the old, oxidized residue.