Z axis upgrade

3D printing as a hobby brings with it plenty of tinkering. I noticed an effect in my printed parts that looks like z wobble from my old cupcake, but the openbeam printer should be better constrained in the xy axes to prevent that. Basically there are 8mm guide shafts that keep everything aligned and a pair of z motors with misalignment couplings and a threaded rod and M8 nut to actually impart the force in the z direction with minimal x and you components. I had used some spare M8 threaded rods that I bought from makerbot when they were clearing out old cupcake parts. What I noticed was that the ridges on my parts changed size as a function of layer height. This meant that some layers were being squished more than others. The pattern was the exact same pitch as the threaded rod, which meant the z didn’t […]

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DLNA Adventures

It’s 2014. There really ought to be a good way to handle mp3 files and be able to organize and listen to music in some kind of sensible manner. I was a college kid in the early 2000s, so I had a haphazard collection of mp3s ripped from CDs and shared around campus. I attempted to organize it at least a half dozen times since then, and it has become so scattered that it just became unmanageable over the years and the new computers, external drives, backing everything up to CD and DVD, etc. The current solution: It looks like a decade of procrastination has allowed other people to nearly solve the problems of managing a media library. The current solution looks to be DLNA, which strikes me as the OPC-UA equivalent to the media space. Without boring you with the details of arriving at this solution, here is my […]

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