Part Modeling > Engineering Features > Round > To Create a Surface-to-Surface Variable Round
  
To Create a Surface-to-Surface Variable Round
 
* If you are not using two surfaces to create a Variable round, refer to To Create a Variable Round.
1. In the graphics window, select two surface references.
 
* Hold down the CTRL key and click to select additional references for the active round set or to remove references.
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. Right-click the graphics window and choose Make variable from the shortcut menu. You can also place your cursor over the handle of the radius, right-click and choose Add radius from the shortcut menu to make the round set variable.
The Spine collector on the Sets tab is activated. Notice that the preview geometry is hidden while you select the spine reference.
4. Select an edge to define a spine for the round. The system copies the current radius and its value and places each radius at each ends of the round pieces.
 
* These are the default radii for a Variable round. These radii do not contain anchors and cannot be relocated. To delete these default radii, you must use Make Constant from the shortcut menu. This command converts the active round set from Variable to Constant.
5. To add another radius, place your cursor over the handle of the radius that you want to copy, right-click and select Add radius from the shortcut menu. These additional radii contain anchors. You can drag the anchor or snap it to a datum point reference to relocate the radius.
 
* You can select Delete from the shortcut menu to remove the radius.
6. To define a radius, drag the radius handle to the preferred distance or snap it to a reference. The system displays the distance value in the graphics window and dynamically updates the preview geometry.
 
* You can type a new value in the Radius value box or select a most recently used distance value from the list in the Radius table (Radius column) located on the Sets tab.
7. Click .
 
You can also use the Add radius, Delete, and Make Constant shortcut menu commands from the Radius table on the Sets tab.
To quickly define a radius, double-click the distance value in the graphics window. After the box opens, type a new value and press ENTER, or select a most recently used value from the list.
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.
You can always select Default in a most recently used list to enable the system to determine the value.
As you work in the graphics window, you can use Clear from the shortcut menu to clear all references from the active collector.
To remove a reference from within 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.