Go to Create
CV Curve Tool
Option Box and reset the settings.
In the Front view create a curve, starting
in the origin, with 5 units between each CV
point. Hold down the x key on your keyboard
when placing the CV's to snap to the grid.
For this tutorial I will use a total of 6
CV points.
Then go
to Create
NURBS Primitives
Circle
Option Box. Reset the settings and
hit Create.
With the Nurbs Circle selected, shift select
the curve. Enter the Modeling
menu set and go to Surfaces
Extrude
Option Box. Reset the settings and
hit Extrude.
You should now have extruded the circle along
the curve you made in step 1.
Grab the
Nurbs Circle and move it about 3 units in
the x axis. The extruded surface will move
as well because of contruction history, but
it's important that you ONLY move the circle.
In the circle's outputs you'll have an extrude1
node. Click it to expand it and set Use
Component Pivot to Component
Pivot and Use Profile Normal
to off. Nothing will happen
yet, but it will when you increase the Rotation
value.
Speaking of the Rotation value. Try setting
it to 360. Now the extruded surface will make
a spiral that goes one time around the curve.
If you try moving the circle along the x axis
you will see that its position will increase
the circumference of the spiral.
Keeping the circle in positive 3 in the x
axis will give you a result like the image
to the right.
CV Curve Tool 
