Part II: Building Intelligence into Your Parts
faces is selected first. If this were a more commonly used feature, the interface for it might be
made a little less cryptic, but because this feature is rarely, if ever, used, it just becomes a quirky
piece of trivia.Double hold line fillet ....................................................................................
A single hold line fillet is a form of variable radius fillet, but instead of it being defined using
the variable radius fillet type, it is created using the face fillet. Rather than the radius being
driven by specific numerical values, it is driven by a hold line, or edge, on the model. The hold
line can be an existing edge, forcing the fillet right up to the edge of the part, or it can be created
by a split line, which enables you to drive the fillet however you like. Figure 7.46 shows these
two options, before and after the fillets. Notice that these fillets are still arc-based fillets; if you
were to take a cross-section perpendicular to the edge between filleted faces, it would be an arc
cross-section with a distinct radius. However, in the other direction, hold line fillets do not nec-
essarily have a constant radius, although they may if the hold line is parallel with the edge
between faces.FIGURE 7.46Single hold line fillets
Hold line (edge) Hold line (split line)
You can select the Hold line in the Fillet Options panel of the Face Fillet PropertyManager, as
shown in Figure 7.47. The top panel, Fillet Type, is available only when the feature is first created.