SP16: Compact Clock

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SP16 is my simplest and most reliable weight driven clock. It has an 8-day runtime and an accuracy of 1-2 minutes per week. All gears sit on three primary arbors making it very compact with a small bill of materials. This makes it even easier to build than my "Easy Build" clocks.

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The overall size is 7.7" (196mm) wide, 11.6" (295mm) tall, and 6.1" (156mm) deep, not including the pendulum. Printing takes around 35 hours on a 250x210mm or 220x220mm size printer using 0.9kg of PLA.

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The gears are an optimized cycloidal design optimized for 3D printing. I call them "Perfect Print Gears". The frame is a simple two-piece design with the pendulum placed next to the gears. The deadbeat escapement with a small tooth span requires a large pendulum amplitude. This should increase reliability by providing an impulse over a large portion of the swing.​