Part Modeling > Engineering Features > Round > To Create a Round Driven by a Curve
  
To Create a Round Driven by a Curve
1. In the graphics window, select the references from which to create a Constant or Variable round. Notice that the round propagates across tangent neighbors until it encounters a break in tangency. However, if you use a One-by-One chain, the round does not propagate across tangent neighbors.
2. Click Model > Round. The Round tab opens, and preview geometry is shown. Notice that the selected references are in the References collector on the Sets tab.
3. In the graphics window, hold down the SHIFT key and drag a radius handle to snap it to a chain of curves as the Driving Curve reference. As you drag, notice that the reference is pre-highlighted as your cursor moves over it. This enables you to target the correct reference. The system displays preview geometry of the round.
 
* You can use Through curve from the shortcut menu to restore the round to its previous state.
4. Click .
 
If you prefer, you can create a Round Driven by a Curve by clicking Through curve on the Sets tab. The system activates the Driving Curve collector.
In the graphics window, select a chain of curves. The system populates the Driving Curve collector with the reference and displays preview geometry of the round. Notice that the preview geometry is hidden while you select the Driving Curve reference.
You can also use Through curve from the shortcut menu to create this round.
If you are using a chain as a reference and you want to modify it, click Details on the Sets tab and use the Chain dialog box.
If a Driving Curve reference is not present, you can click Model > Sketch to open the Sketch tool and create one.
As you work in the graphics window, you can use Clear from the shortcut menu to remove all references from the active collector.
To remove a reference from a collector, select the reference that you want to remove, and with your cursor still in the collector right-click and choose Remove from the shortcut menu.
To easily create a round as you work in the graphics window, select edge references, right-click and choose Round Edges from the shortcut menu. The Round tool opens enabling you to continue working with the round. Note that this command is available only if you select edge references.