Outside Caliper

cults3d

From the archives of functional yet impractical projects, I've extracted a planetary-geared caliper set capable of measuring outside dimensions up to 20cm with a level of accuracy that's more or less precise within 2mm based on my rigorous testing. Interestingly, due to the geometry involved in translating the angle between the caliper arms into degrees displayed on the dial, this device proves to be more accurate at larger measurements than it is at smaller ones. It's no secret that assembling the caliper so that the zero mark on the dial aligns with the tick mark in the viewing window can be a real challenge, especially when dealing with herringbone gears. If what you're looking for is a highly accurate caliper, then I must advise you to purchase one online at an affordable price. However, if your goal is to create a working mechanical curiosity that you've printed yourself, then welcome, friend, and come on in!