Yardstick Circle Compass

thingiverse

I was working on a project at home where I needed to make some wide circles that were exactly 50 inches in diameter. To do this, I used a nail and tape method on a ruler, but I soon realized that there had to be a more universal and easier way to get the job done. That's when I came up with the idea of the Yardstick Compass! The parts can slide onto any standard yardstick, allowing me to make circles of various sizes ranging from just one foot to several feet wide. I designed this device using 123D design software and included the .X3d file for anyone who wants to modify or remix it. This design is based on a Sharpie marker but can be easily adapted to use other tools like an Xacto knife or Expo Marker. The latest version of the Yardstick Compass includes oversized bolts that can be used to lock down the sliders where you want them on the ruler. Alternatively, you can also use standard sheet-rock screws in the center hole, just make sure to cut off the tip so it doesn't damage the yardstick. You'll need to attach supports when printing this design using a Makerbot or similar machine, but don't worry - I've already oriented the supports for optimal printing on a Makerbot with Makerbot Support. The .STL file is grouped together, but you can easily separate them in Meshmixer if needed. If you have any questions, feel free to reach out and I'll be happy to help. Happy Printing!