Here is one other machining problem the Delcam team encountered: The company’s machine shop overlooked a feature. A support buttress should have been machined away, but the shop kept it in place, mistakenly assuming this to be one of the designed features. The shop had access to the final CAD model and the near-net CAD model, and could compare the two to see what to machine. In spite of this, the feature was overlooked. The communication needed to be clearer than this, Gunnink says.

Ironically, the use of this advanced 3D process might argue for 2D drawings as communication tools. The shop would not have made the mistake had it simply been given drawings with notes and arrows indicating the features to be removed.

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