FLYN17 5 - firepick1/FireSlide GitHub Wiki

Flywheel for Nema17 with 5mm shaft

Function

3DP cylinder wound with two layers of dense wire (e.g., 16-18AWG copper wire) provides sufficient moment of inertia to act as a flywheel for dampening rough mid-range resonances that can cause step loss during start/stop phases of a stepper movement.

Moment of inertia about an axis is given as sum of mass times square of radius. Wire wound around a cylinder therefore provides maximum moment of inertia for the mass of the wire. The wire is wound in two separate layers, each fixed at its endpoints by embedding wire ends to provided holes in the flywheel. First layer of wire is wound clockwise and second layer counter-clockwise to keep layers from tangling with each other. Copper is recommended for density, but other wire may work as well.

Symmetrically opposed pair of M3 screws secure flywheel to rear 5mm shaft of dual shaft Nema 17 stepper.

Requires

  • M3 screw with socket cap or M3 set screw (2)
  • M3 nut (2)
  • 1-1.3mm bare copper wire (about 170mm)

See Also