Use this command in situations where you need to create a single compound spiral solution as a transition between two curves with different radii.
Because free spirals have only one geometric solution, you cannot specify length or A value. The program makes the calculation.
The following illustrations show a free spiral between two curves. The solution depends on the selection order of the curve that the spiral is being attached to. The first illustration shows a left solution, where the inner circle was selected first. The second illustration shows a right solution, where the inner circle was selected second:
To add a free spiral (between two curves)
- Click the alignment. Click Alignment tab
Modify panelGeometry Editor
. - On the Alignment Layout Tools toolbar, click
Free Spiral (Between Two Entities). The current spiral definition is displayed on the command line. For more information about changing the default spiral definition, see Specifying Curve and Spiral Settings.
- Select the entity before and the entity after to add the spiral to.
The solution depends on the order in which you select the curves that the spiral is being attached to. For a solution where the spiral is coming from the left, select the inner circle first. For a solution where the spiral is coming from right, select the inner circle second.