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Alibre Design

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Chapter 5 - 3D Sketching‣ To sketch a circular arc using Tangent-Start, End:1. Select the Circular Arc - Tangent-Start, End tool from the Sketchingtoolbar; or from the 3D Sketch menu select Figures > Circular Arc > Tangent-Start, End.2. Click a line or circular arc.3. Move the cursor to size the arc.4. Click a second time to complete the arc.Note: The plane of the arc is defined by the tangent line passing through the nodes atthe start and end of the arc.You can also modify a 3D sketch circular arc in the same way as a 2D sketch circulararc see "Circular Arcs" on page 55.5.3.3 SplineCreation of NURBS curves by interpolationUsing this method, specify a set of nodes in the Work Area to define the spline. A curveis then interpolated based on the placement of the nodes.1. Select the Spline tool from the Sketching toolbar; or from the 3D Sketchmenu select Figures > Spline.2. Click in the Work Area to start the spline curve.3. Move the cursor and click a second time to place an interpolation node.4. Move the cursor to shape the curve.5. Continue clicking to place additional nodes and curve segments.Note: One or more interpolation nodes may be specified via the direct coordinateentry tool.129

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