Hackaday · Creativity & design

Low-Cost Dexterous Robot Hand Developed

A new robot hand, dubbed the Yeah Hand, has been developed using mostly 3D-printed parts and affordable servo motors, aiming to provide greater dexterity at a lower cost.

The Yeah Hand utilizes five servo motors per hand, with fishing-line tendons transferring motion from the motors to the fingers, mimicking a human hand's structure. To minimize friction and prevent overheating, each tendon passes through PTFE Bowden tubes. In testing, the hand completed 800 open-close cycles without overheating.

The hand demonstrates significant strength, capable of lifting up to eight kilograms and exerting a maximum grasping force of five kilograms. For improved grip, silicone pads are integrated onto the inner surfaces of the fingers, and the thumbs feature thumbnails for handling delicate objects.

Two versions of the hand are available: a robotic version with various mounting flanges and an ROS driver, and an experimental prosthetic version. Control can be made more intuitive using a glove equipped with flex sensors that mirror the user's hand movements.

This development offers a more accessible option for robotic hands compared to many existing human-like designs, potentially benefiting hobbyists and those with specific needs.

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