In robotics, price is basically actuator count. Stringman reaches an entire room with four motors, hanging its gripper from lines anchored in the ceiling corners. Working from above, it reaches floors too cluttered for any wheeled or legged robot. And since the lifting force is shared by all motors, payload capacity scales with their combined torque instead of a single actuator's, peaking near the center of the room where the lines share the load most evenly.
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Stringman is open source and OSHWA certified. The mechanical CAD, the PCBs, and the control software are all published.
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