The helix can be used as a path or guide curve for a swept or loft feature. Click View, Geom Curve to toggle the display of individual curve.
To create a helix curve:
Click Helix (Curve toolbar) or click Geometry, Curve, Helix.
There provides four types helix: Cylinder, Cone, Torus and Along Curve. To create a helix, select a coordinate system or circle, cylinder or cone firstly, define the radius next. If you select a circle or a cylinder, the radius will be automatically setting as the radius of the circle or cylinder. For Conical, Torus, Along Curve, you should define two radius.
The other three parameters is loop number, height and total distance.
The Helix dialog has the following creating methods:
Distance/Loop . Creates a helix defined by distance between each loop and loop number (the number of turns).
Height/Loop . Creates a helix defined by the total height and loop number.
Height/Distance. Creates a helix defined by total height and distance between each loop.
a. Cylindrical helix b. Conical helix. c. Torus helix d. Along Curve.