PartDesign AdditiveHelix

Description
The Helix tool creates a solid by sweeping a selected sketch or 2D object along a helix path.



The profile (B), is swept around axis (A) in order to produce the solid helix (C)

Usage

 * 1) Select the sketch to be swept into a helix. A face on the existing solid can alternatively be used.
 * 2) Press the  button.
 * 3) Set the Helix parameters (see next section).
 * 4) Press.

Options
When creating an Additive Helix, the Helix parameters dialogue offers several parameters specifying how the sketch should be swept.

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 * [[Image:partdesign_revolution_parameters.png|left]]

Axis
This option specifies the axis about which the sketch is to be swept.
 * Vertical sketch axis: selects the vertical sketch axis.
 * Horizontal sketch axis: selects the horizontal sketch axis.
 * Construction line: selects a construction line contained in the sketch used by the Helix. The drop down list will contain an entry for each construction line. The first construction line created in the sketch will be labelled Construction line 1.
 * Base (X/Y/Z) axis: selects the X, Y or Z axis of the Body's Origin;
 * Select reference...: allows selection in the 3D view of an edge on the Body, or a datum line.

Mode
This controls what parameters will be used to define the helix, Allowable choices are: Pitch-Height, Pitch-Turns and Height-Turns.

Pitch
The distance between turns in the helix.

Height
The height of the helix (center-center).

Turns
The number of turns in the helix. Define as Height/Pitch

Left handed
If checked, the turning direction of helix is reversed from default clockwise to counterclockwise.

Reversed
If checked, the axis direction of helix is reversed from default.


 * }

Properties
Below are properties which can be defined after creation of the feature. Data properties Base and Axis are uneditable.


 * : angle of rotation. See Angle.
 * : label given to the operation, can be changed at convenience.
 * : true or false. See Symmetric to plane.
 * : true or false. See Reversed.
 * : true or false. If set to true, cleans the solid from residual edges left by features. See Part RefineShape for more details.