Lasercut I-beam linear axis, v1

thingiverse

This linear axis design bypasses traditional steel rods and bearings, opting instead for a lasercut structure reinforced with low-friction tape that forms plain bearings. The I-beam architecture provides exceptional rigidity, while trapped-nut pockets accommodating M4 screws on all sides enable the use of this system as a standard base for constructing machines, much like aluminum profiles are used today. A quick video demonstration is available at https://www.youtube.com/watch?v=oqJivOp4JyQ. This design is part of the TapeCore project, which can be found on GitHub at https://github.com/jonnor/tapecore. Upcoming tests aim to construct axes from multiple smaller pieces, with the goal of creating longer axes than those produced by a lasercutter. This will facilitate the construction of large machines and explore the potential for self-replication. For pulleys and idlers, the design utilizes http://www.thingiverse.com/thing:1850661. To build this system, you'll need: * Low-friction tape (UHMW PE or Teflon ideal; Kapton also works well) * A NEMA17 stepper motor with M3 screws * Braided line (such as fishing line) * Four M4x20+ screws * Four M4x15+ screws This design is optimized for 6mm material (MDF, plywood, or acrylic) but can be easily modified using the included FreeCAD source.