Prepare model for 3d printing

     IMPORTANT CONSIDERATIONS     

• If your model has fittings, there should be an additional compensation of 0.2 or 0.3 mm for the holes;

• The surfaces of your model must be at least between 1 and 1.5 mm thick;

• If you are using flat surfaces, you can use commands such as:

_OffsetSrf
_OffsetMesh
_OffsetSubD

• The maximum size of your model must be prepared for a cube with sides measuring 25 cm;

  • This may require dividing it into several pieces.

    
    

     STEP 1       Prepare, clean up and optimize model

1.1 Check for naked edges

Naked edges refer to gaps in your geometry that could prevent successful 3D printing.

Use the following command:

_ShowEdges

This will highlight any problematic areas in pink.

If you spot any gaps, use these commands to fix them:

_Join
_Cap
_FillMeshHoles

1.2 Convert surfaces to a solid

For 3D printing, your Rhino model should be a closed polysurface or solid.

Use this command to ensure that your model is print-ready:

_CreateSolid

1.3 Scale your model correctly

Set the correct units and scale before exporting.

Most 3D printers work in millimeters, so I recommend checking and converting if needed:

_Units

 Choose Millimeters and scale your model accordingly.

     STEP 2       Export your Rhino file for 3D printing

2.1 Choose the Right File Format

Most 3D printers accept .STL files, but some also support .OBJ or .3MF.

I recommend .STL for its wide compatibility.

To export, use the command:

_Export

Choose STL and adjust the settings:

• Binary (Smaller file size)

• High Resolution (For detailed prints)

• Export as ASCII only if required

Click OK, and your file is ready.

     STEP 3       Validate and repair the .STL file

3.1 Use Rhino’s Built-in Analysis

Rhino Software has a Check Mesh tool that identifies potential issues.

Run the command:

_Check 

If errors appear, use these commands for fixes:

_RebuildMesh
_MeshRepair

3.2 Use External Validation Tools

I also recommend using Autodesk Netfabb or Microsoft 3D Viewer to double-check your .STL file.