Part Helix

Description
The Part Helix command creates a parametric helix shape.

FreeCAD creates a helix, with default values for pitch, height and radius. The shape angle can be set too.

By default, the rotation axis of the helix is is equal to the z-axis. The start point of the curve is on the x-axis. Its rotation is counterclockwise.



Usage

 * 1) There are several ways to invoke the command:
 * 2) * Press the button.
 * 3) * Select the option from the menu.
 * 4) * Select the option from the menu.
 * 5) Set options and press.
 * 6) To close the dialog press.

Example


A Part Helix object with the values of the bottom scripting example are shown here.

Properties
See also: Property editor.

A Part Helix object is derived from a Part Feature object and inherits all its properties. It also has the following additional properties:

Data

 * The handedness of the helix.


 * The pitch corresponds to the space between two consecutive "turns" of the helix measured along the main axis of the helix.
 * The height corresponds to the overall height of the helix measured along the main axis of the helix.
 * The radius corresponds to the radius of the circle built by the helix by viewing the helix from the top or bottom.
 * Per default the helix is built on a imaginary cylinder. With this option it is possible to build the helix on a imaginary cone. This angle corresponds to the angle of the cone. The value must be comprised between 0 and +90 deg.
 * Per default the helix is built on a imaginary cylinder. With this option it is possible to build the helix on a imaginary cone. This angle corresponds to the angle of the cone. The value must be comprised between 0 and +90 deg.

Scripting
A Part Helix is created with the method of the document.


 * Where is the name for the object. The name must be unique for the entire document.
 * The function returns the newly created object.

The is the user editable name for the object. It can be easily changed by

You can access and modify attributes of the object. For example, you may wish to modify the pitch, height and radius parameters.

You can change its placement and orientation with: