If precision is not important, the JoinEdges command can be used to join surfaces forcibly, however it’s better to recreate the bad surface.Created surfaces and existing surfaces must be within model tolerance to join correctly. Naked edges due to missing surfaces are easily corrected by filling in the hole with a new surface and joining the new surfaces together.Select Analysis → Show Edges → Naked Edges to display naked edges in your object.To close open polysurfaces in Rhino (or convert open polysurface to solid in Rhino), you first find them by selecting Analyze Direction → Show Edges → Select Open Polysurfaces, and then follow the steps below: How To Prevent and Fix Naked Edges To achieve a watertight model, you need a closed polysurface. Naked Edges are surface edges not connected to other surface edges, which create open meshes that cannot be 3D printed.įor successful 3D prints, the 3D model should be watertight, meaning if you dropped the model in a bath, no water would get inside. Bad Objects are those that violate NURBS (Non-Uniform Rational B-Splines) rules or have structural problems - they often appear after joining and Boolean operations. The most common reason models become unprintable is due to bad objects and naked edges. Pro-Tip: Check out our guide on How to Conduct a Tolerance Analysis for 3D Printed Parts if you have complex tolerance requirements and want a simple way to perform a tolerance analysis. No matter what units you use to create your model, files exported from Rhino are almost always read as mm, so set your units to mm before exporting your file for printing. Rhino file tolerance can be set from the document properties window in the units tab. A good rule of thumb is to set your Rhino tolerance to be 10 times that of the printer tolerance (i.e printer tolerance is 0.1mm, so Rhino tolerance should be set to 0.01mm).
You first need to set correct tolerances before you start modeling by finding the tolerance of the program you are exporting your model to.
0 kommentar(er)
