Draft Accuracy of Geometry

This function can be used to refine the faceting of a part, where the rectangular and triangular faces formed by the facet lines are used to make the contours as close to the actual object as possible.

The program will first facet the volume with a value that it assumes appropriate. This can be refined if needed. The starting point for faceting when creating a face is the default value of the face's portions, based on which the program will create the default faceting.

You can achieve the exact shape of the face (A) by reducing the tolerance value (B) and the angle tolerance value. The angle tolerance affects the mesh formed by triangular faces on rounded surfaces. If you decrease the angle tolerance value, the number of triangles increases and the shape of the surface becomes more detailed.

When cutting up a volume, the program will again facet the volume with a calculated value that it assumes appropriate (default faceting), even if you have refined the faceting.

A small tolerance value will make the model slower to handle. Due to this, you should perform the faceting after finishing the model.

Find the appropriate draft accuracy by trying out several different values.

1. Select View | Settings | Draft Accuracy.

   If you select this function in an assembly model, you can select parts or all of the parts with the middle mouse button.

   In an assembly model, the draft accuracy affects only the local parts. Specify the draft accuracy using the tolerance value.

2. Define the geometry drafting properties in the dialog box
   • Specify the Tolerance and click Apply.
     • Refine the draft accuracy by reducing the tolerance value, for example to 0.1 or 0.01.
     • If you wish to have a coarser draft accuracy, increase the tolerance value, for example to 1 or 10.
   • Specify the Angle Tolerance and click Apply.
     • Refine the shape of a rounded surface by reducing the tolerance value, for example to 0.1 or 0.01.
     • If you wish a rounded surface to have a coarser shape increase the tolerance value, for example to 1 or 10.
   • The program calculates default faceting when you set both Tolerance and Angle Tolerance to 0.
   • If you select Save, the draft accuracy values are saved in the part and faceting will always be done when performing an operation.
   • If you do not select Save, the values last used for faceting will be shown as the draft accuracy values.
3. Confirm the data.