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  1. Generally, the rhino file prepared for milling must contain the following layers:
  2. Stock: a box, at the world origin, representing the size of the block of your milling material.
  3. Topography: a single NURBS surface for smooth terrain, or a series of flat surfaces for stepped terrain.
  4. Features: layer(s) with NURBS surfaces for roads, water, etc.
  5. For each features layer, there should be another layer with boundary curves for each feature surface.
  6. Buildings: If buildings are to be milled with the base, include a layer with NURBS surfaces at the tops of buildings.
  7. A layer with boundary curves for each building top surface.
  8. Buildings too large or too small to be milled with the topography need pockets. Include a layer with curves outlining the bases of these buildings (at the z depth you want the bottom of the pocket cut).
  9. Final contour: a layer with a curve tracing the four outside edges of the topography layer, and the same curve projected to z=0.
  10. This file can be imported directly into Mastercam.

File preparation: Mastercam

  1. See the CNC tutorial for more detail. In general, you will need to use a template MasterCAM file, import your geometry, assign it to pre-defined toolpaths and adjust the toolpath parameters for your material.
  2. Files must be submitted to CNC TAs for review and approval.

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