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LEGO Pendulum clock with grasshopper escapement

16.4K views
Oct 24, 2021
3:17

This is a follow-up to the previous video here: https://www.youtube.com/watch?v=eM4AT5o_-Xc As described in my previous video, the escapement pallets would wear out over time. This didn't bother me that much, replacing them as they wore out was not a problem, and the parts lasting around a year cost less than a single cent each. However, I realized that this wear was likely the largest source of inaccuracy of the clock. As the pallets wore down, the characteristics of the clock would change, requiring a different effective length of the pendulum. I wanted to fix this, so I've replaced the escapement with a design inspired by @davidziemkiewicz1350's grasshopper (https://www.youtube.com/watch?v=NPtZhrQ5KO4) and Kei Abe's pendulum suspension (https://www.youtube.com/watch?v=tzuKKuLGjqI?t=296). I think this escapement is probably one of the easier escapements to replicate, and certainly the easiest of my designs. It uses few parts and relies very little on exactly positioning parts with clutch power, which can be annoying to set up. A small change I've made since the video was posted is to use the rubber liftarms with 2 axle holes as the parts the escapement pallets fall onto. This makes the clock almost completely silent!

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LEGO Pendulum clock with grasshopper escapement | NatokHD