Iris display stand and centerfinder / Standfuß und Mittelpunktsfinder for Plotting Compass

thingiverse

This is a stand and center finder for an iris circle drawing tool, also known as a Plotting Compass. Unfortunately, I'm not rich enough to afford the original "Iris" from Makers Cabinet, so I bought a cheap one on Ebay. The stand for displaying it on my desk was not included, so I made a custom one. My Plotting Compass has an inner diameter of 77.8 mm fully opened, so depending on which one you have, you might need to scale it a little bit for accurate center finding. The slot for displaying it is 7 mm wide, which works great with my 6.5 mm thick plotting compass. The model is intentionally designed to touch the Compass only at two points to avoid wiggling. Make sure to print rather slowly to get at least fairly sharp edges on the center mark. I used a speed of 40 mm/s for the outer wall and 50 mm/s for the inner wall. PS: Don't do the same mistake as I did, and take the Plotting Compass apart. It took me roughly an hour to reassemble it... xD