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A
chamfer blend refers to the ruled surface as swept out by the line drawn between the two contact points of the rolling ball. An asymmetric chamfer results from two balls of different radii rolling together, with the contact point of one ball joining with the face to one side of the blended edge and the contact point of the other ball joining with the face to the other edge side. Figure 1-7 shows an example of a chamfer blend.
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Figure 1-7. Chamfer Blend
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This definition of a chamfer has the advantage that in the common case when the faces meet orthogonally in the blended edge, the radii are the same as the offsets as measured along each face. Another advantage is that chamfers and rounds behave in the same way when the angle between the faces meeting in the blended edge approaches
pi: the width of the blend face shrinks to zero. One may contrast this definition with using a chamfer depth measured normal to the chamfer surface from the blended edge: the face becomes infinitely wide as the angle reaches
pi. The surface types available for creating chamfers are limited to plane and cone surfaces in the
Blending Component (a wider variety can be created using the rounded chamfer blend in the
Advanced Blending Component).
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