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Turn any DC Motor into a Servo Motor

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I Built an Internal Cycloidal Robotic Actuator

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BEAR: Backdrivable Robot Actuator for Legged Robots, Humanoid Robots, or Robot Arm Manipulators

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High Precision Speed Reducer Using Rope

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Three Actuators: cheap, powerful and completely 3D printed

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DIY Actuator for quadruped robot based on a ballscrew: Powerful!

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Analog Feedback Servo Motor - Improved Servo Performance

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The Differential Drive - A New Breed of Actuator