About Face-Face Fillet

Conic Parameter

The Conic Parameter option allows you to vary the section of the fillet. For a parameter comprised between or equal to:

• 0.5, the resulting curve is a parabola.
• 0 < parameter < 0.5, the resulting curve is an arc of an ellipse.
• 0.5 < parameter < 1, the resulting curve is a hyperbola.

If the conic mode is activated, the Edge(s) to keep, the Hold Curve and Spine options cannot be selected (and vice-versa).

Conical fillets do not handle twist configurations. If a twist is detected, the fillet operation fails.

If the fillet surface curvature is lower than the support curvature, fillet surface trimming may fail. In such cases, you need to decrease the conic parameter.

Near Point

The Near Point option allows you to select faces as per your requirement to form face-face fillet. If the selected faces to fillet form multiple ribbons, you can specify a reference point nearest to the required ribbon in the Near Point box.

In the below example, two ribbons are formed from the selected faces:

In this case, you can specify a reference point in the Near Point box. The ribbon nearest to this reference point is selected. The result is as shown below:

Edges to keep

You can specify the edges of support body to be kept and create fillet surfaces with hold curve and keep edge as support wherever necessary. This helps in two different situations:

• Initializing the fillet ribbon when no portion of ribbon track lies within the limits of the provided support face.
  
  
• Computing the fillet surfaces with keep edges as supports, whenever the default fillet ribbon track crosses the edges to be kept.
  
  

By default, the Edge(s) to keep box is unavailable. If a hold curve is selected, the Edge(s) to keep box becomes available. When an edge to be kept is selected, it turns purple.

• It is possible to perform thickness, shell, boolean operations on the resulting fillet surface.

• It is possible to specify limiting element.

• Keep edges of type "Round Corner" is not supported.

• The Keep edges should be specified explicitly.

• The fillet ribbon has zero radius at the points where the Keep edges intersects the hold curve. There can be maximum two such points in a fillet ribbon i.e. one at each end of the fillet ribbon.

• Fillet operation may fail in the cases where the keep edge intersects the support face of hold curve.

• Keep edges cannot be the border of edges.

• Keep edges should be sharp.

• Fillet operation fails if twists are encountered.

Limiting Element

Contextual commands creating the limiting elements you need are available from the Limiting element box.

If you create elements using these commands, the app then displays the corresponding icon in front of the Limiting element box. Clicking this icon enables you to edit the element.

You can now specify multiple limiting elements.

Hold Curve

Instead of entering a radius value, you can use a 'hold curve' to compute the fillet. Depending on the curve's shape, the fillet's radius value is then more or less variable.

Contextual commands creating the curves you need are available from the Hold Curve box.

If you create any elements using these commands, the app then displays the corresponding icon in front of the Hold Curve box. Clicking this icon enables you to edit the element.

The Generative Shape Design product license is required to access this capability.

Spine

The spine can be a wireframe or a sketcher element.

Contextual commands creating the spines you need are available from the Spine box:

If you create any elements using these commands, the app then displays the corresponding icon in front of the Spine box. Clicking this icon enables you to edit the element.