Main Ideas of CNC routing

• To CNC a model, your object needs to be able to exist in a tangible, stagnate world that is not virtual. Meaning that it is a closed object, that has a thickness, it is not a render. It is a representation of a real world thing.
• Properties of appropriate "real world" model.
  • Surface Integrity
    • Considered as solid material
    • Water tight
    • No naked edges.
    • No missing surfaces/holes
    • No manifold surfaces
  • Thickness (Object integrity)
    • Object integrity, responding to material constraints
    • Ability to withstand force (gravity, touch.....)
    • Scale, footprint and foundation
  • Appropriate "wall thickness" to withstand the force of the milling end mill.
    • No wall thickness can be under 1/4" (.25") in your model.
  • Formatting model for CNC output.

A CNC router (Or Computer Numerical Control router) is a computer-controlled cutting machine related to the hand held router used for cutting various hard materials, such as wood, composites, aluminium, steel, plastics, and foams.