Fit Spline

Use the Fit Spline tool to fit sketch segments to a spline. Fit splines are parametrically linked to underlying geometry so that changes to the geometry update the spline.

Fit spline chooses the most logical fit to the geometry you select, but you can modify the fit. If you select an entity that has been fit, the entity is no longer part of the spline. If you select an entity that is not part of the spline, the spline adjusts to include the selected entity.

You can also include model edges in a fit spline. However, you cannot constrain other geometry to the splines.

The Fit Spline PropertyManager controls:

Parameters

• Delete geometry. Deletes the original sketch segments from the sketch. Otherwise, the segments remain as construction geometry separate from the spline. When cleared, you can select the Constrained, Unconstrained, or Fixed options.

• Closed spline. Creates a closed contour spline.

• Constrained. Parametrically links the fitted spline to the defining geometry.

• Unconstrained. Creates the fitted spline as the same shape as the original defining geometry but with no constraints. You can dimension, constrain, and drag the spline.

• Fixed. Creates the fitted spline as the same shape as defining geometry but it is fixed in space.

• Undo Spline. Restores a spline to its previous state by cancelling the last operation.

Undo Spline is available only when you have multiple splines, click to pin down the PropertyManager, change one spline, and then click OK .

• Edit Chaining. Allows you to edit the chain of splines created. Editing applies only to the order of the non-contiguous spline elements, not the sketch entities. Click or to undo or redo the edits.

Tolerance

• Tolerance . Specifies the maximum deviation allowed from the original sketch segments. Use the thumbwheel to adjust the tolerance so you can see changes to the geometry in the graphics area.

• Actual Deviation. Updates based on the Tolerance value and the geometry selected. This is automatically calculated.

Preview Options

• Inflection points. Displays all points where the concavity of the spline changes.

• Minimum radius. Displays the radial measurement of the curve with the smallest radius of the spline.

• Curvature comb. Displays the visual enhancement of the slope and curvature of most sketch entities.

To fit sketch segments to a spline:

1. In an open sketch, click Fit Spline (Spline Tools toolbar) or Tools, Spline Tools, Fit Spline.

2. In the graphics area, click the sketch entities to fit to the spline.

3. Set the properties in the Fit Spline PropertyManager.

4. Click OK .