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Sprocket & Chain animation (developmental for robot arm)

So I've decided that the mechanism that will drive the lower robot arm from the upper arm via the elbow joint is a chain and sprocket set. Here is my experimental Blender animation of it. Just finished. One end of the chain will be pulled by the "bicep" actuator, the other by the "tricep" one. The main sprocket will be right inside the elbow joint. Had great fun today making this!