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Hanno Braun

making and small-scale manufacturing


I have a daily habit of working on side projects, and I've come to appreciate the benefits of tracking that habit out in the open. If I'm doing work on a software project, I track that on GitHub. If it's more hands-on, I like to post an update here.

  1. I crashed my printer yesterday! Into the screws at the back of the heat bed, that serve as a stop for the steel sheets. No visible damage. The nozzle just flexed out of the way, but I don't know if anything was knocked out of alignment.

    Lesson learned: PrusaSlicer will happily let you drive the nozzle into those screws, if you tell it to. Even though it usually throws an error at you, if it sees a path that is out of bounds.

  2. Now that my printer works again and all my problems are solved forever, I'm back to getting the NonOilen to work. I made good progress, but am having some trouble with warping.

    I'll post a note about printing NonOilen on a Prusa Mini, once I got it working sufficiently well.

  3. In my main workshop, I got this lamp with an integrated magnifying glass attached to my bench. I was missing something similar in my severely space-constrained home workshop, so I got this tiny thing.

    I haven't used it extensively, so I can't give a firm recommendation yet, but it looks decent and literally fits in my pocket.

  4. I switched back to the 0.4mm nozzle on Friday. Printer is still working flawlessly. The calibration cube pictured above is certainly the best I've seen in weeks.

    I think the problems were caused by two separate partial clogs: First after a change from Prusament PLA to Fillamentum NonOilen, the second after I ran the Mini's built-in first-layer calibration (which assumes a 0.4mm nozzle) with the 0.25mm nozzle.

  5. This is hard to believe, but I managed to print something without any issues, for the first time in weeks. And not only once, I did two of these first layer calibration prints in a row, plus a spacer.

    Before that, I was cleaning the nozzle on the outside and figured, why not heat it way up, to see if that can get any potential obstructions out of there. After that and a filament purge, I've only seen good prints so far.

    Could it be that all of these mystery problems were caused by partial clogging of the nozzle or hot end?