draft

Design & Tech CAD

Draft feature

The draft feature is commonly understood with respect to mould tools. It will add or subtract material to a group of edges to the set draft angle.

4 elements:

1. Draft surfaces - those surfaces to which material will be added or subtracted

2. Draft hinges - the edges about which the surfaces will rotate - these do not have to be adjacent to the draft surfaces

3. Pull direction - in the above scenario, either the chosen edge or the bottom surface indicates the zero degrees vector - vertical

4. Draft angle

Silhouette Trim

Useful for finding your split line on complex surfaces eg. creating a mould tool;

Select your solid surfaces - select one surface > RMB menu > Solid Surfaces

Copy and Paste to create Surf Copy feature

select the Copy feature - Edit > Trim

select a plane/planar surf parallel to your split

choose the Silhouette option in the dashboard

choose which side to keep