What is freestep?

FreeStep is a hardware project for a motorized walking aid device, likely a walking exoskeleton or mobility assist frame. The repository is written in Chinese and contains photographs of the assembled device, a link to a Bilibili video showing it in action, and a detailed bill of materials for building one yourself. Based on the video title and the materials listed, the project was created to help people with limited mobility walk. The structure uses aluminum alloy 6061 beams and tubes, carbon fiber tubing, 3D-printed ABS plastic parts, and stainless steel axles. The powered components include 12V DC motors with gearboxes, Festo pneumatic actuators, and synchronous belt drives. Linear bearings and rubber wheels are part of the motion system. The parts list is detailed, specifying wall thicknesses, hole patterns, and assembly notes for each component. Some 3D-printed parts require printing in multiple colors depending on which piece they are, and several metal parts need threads tapped into them before assembly. The repository notes that variation in finished assemblies is expected due to differences in craftsmanship, materials, and equipment between builders. A safety note in the README stresses that the device should undergo thorough safety and durability testing before it is used by a person. This is a maker project shared by an independent team, not a certified medical device. No source code is included in the repository. It serves as a build reference, sharing the design through photographs and a bill of materials rather than CAD files or electronic schematics.