OPENSCAN

TLDR: I improved the setup and got myself some highly accurate steel spheres with nominal diameter of 20 and 25 mm ± 0.0025mm. I used the OpenScan Mini to scan a scene with both spheres, scaled it using a reference measurement from one sphere, and analyzed the diameter and surface deviation of the second one. I reliably get a diameter of ~20±0.03mm as well as a surface deviation within 2σ = 0.03mm I knew that my latest post claiming a bold 0.008mm accuracy made a very click-

TLDR: I scanned a feeler gauge with the OpenScan Mini, processed the data in the OpenScan Cloud and scaled the object with the help of the known dimension. Next, I digitally measured the thickness of each feeler and got a deviation of 0.008 mm from the claimed/real thicknesses (0.05 mm - 0.55 mm). There are several points that will be discussed in this article. But just to give you a perspective, that 0.008 mm is somewhat around a fifth of the thickness of the human hair. Sin

Five years ago, I did not even know what an Arduino could be and now this... I am still overly happy about this wonderful and very positive article, that you can find at heise.de (paywall) or in your local kiosk. As you might have noticed, over the last few months there has been quite some silence from my side over, but this will definitely change again since health and other challenges have been mostly solved. So here is just a sneak peek of some upcoming articles and update