Part Helix: Difference between revisions

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=== Data ===
=== Data ===

{{TitleProperty|Attachment}}

The object has the same attachment properties as a [[Part_Part2DObject#Data|Part Part2DObject]].


{{TitleProperty|Coordinate System}}
{{TitleProperty|Coordinate System}}

*{{PropertyData|Local Coord}}: The [https://en.wikipedia.org/wiki/Screw_thread handedness] of the helix.
* {{PropertyData|Local Coord|Enumeration}}: The [https://en.wikipedia.org/wiki/Screw_thread handedness], or direction, of the helix: {{Value|Right-handed}} or {{Value|Left-handed}}. The default is {{Value|Right-handed}}, meaning the helix turns counterclockwise as it goes up.


{{TitleProperty|Helix}}
{{TitleProperty|Helix}}


*{{PropertyData|Pitch|Length}}: The pitch corresponds to the space between two consecutive "turns" of the helix measured along the main axis of the helix.
* {{PropertyData|Pitch|Length}}: The distance between two consecutive turns of the helix measured along its Z axis. The default is {{Value|1mm}}.
*{{PropertyData|Height|Length}}: The height corresponds to the overall height of the helix measured along the main axis of the helix.
* {{PropertyData|Height|Length}}: The height of the helix. The default is {{Value|2mm}}.
*{{PropertyData|Radius|Length}}: The radius corresponds to the radius of the circle built by the helix by viewing the helix from the top or bottom.
* {{PropertyData|Radius|Length}}: The start radius of the helix. The helix has a constant radius if {{PropertyData|Angle}} is {{Value|0°}}.
* {{PropertyData|Segment Length|QuantityConstraint}}: The number of turns per helix subdivision. The default is {{Value|1}}, meaning each full turn of the helix is a separate segment. Use {{Value|0}} to suppress subdivision.
*{{PropertyData|Segment Length|Length}}:
*{{PropertyData|Angle|Angle}}: 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.
* {{PropertyData|Angle|Angle}}: The angle that defines of the outer shape of the helix. Valid range: {{Value|-90° < value < 90°}}. The default is {{Value|0°}}. If it is {{Value|0°}} the helix is cylindrical, else it is conical.


==Scripting==
==Scripting==

Revision as of 10:17, 2 March 2022

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Part Helix

Menu location
Part → Create primitives → Helix
Workbenches
Part, OpenSCAD
Default shortcut
None
Introduced in version
-
See also
Part Primitives

Description

A Part Helix is a parametric shape that can be created with the Part Primitives command. In the coordinate system defined by its DataPlacement property, the axis of the helix matches the Z axis and its bottom point, the start point, lies on the X axis.

Usage

See Part Primitives.

Example

Part Helix from the scripting example

A Part Helix object created with the scripting example below is shown here.

Notes

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

Attachment

The object has the same attachment properties as a Part Part2DObject.

Coordinate System

  • DataLocal Coord (Enumeration): The handedness, or direction, of the helix: Right-handed or Left-handed. The default is Right-handed, meaning the helix turns counterclockwise as it goes up.

Helix

  • DataPitch (Length): The distance between two consecutive turns of the helix measured along its Z axis. The default is 1mm.
  • DataHeight (Length): The height of the helix. The default is 2mm.
  • DataRadius (Length): The start radius of the helix. The helix has a constant radius if DataAngle is .
  • DataSegment Length (QuantityConstraint): The number of turns per helix subdivision. The default is 1, meaning each full turn of the helix is a separate segment. Use 0 to suppress subdivision.
  • DataAngle (Angle): The angle that defines of the outer shape of the helix. Valid range: -90° < value < 90°. The default is . If it is the helix is cylindrical, else it is conical.

Scripting

A Part Helix is created with the addObject() method of the document.

helix = FreeCAD.ActiveDocument.addObject("Part::Helix", "myHelix")
  • Where myHelix is the name for the object. The name must be unique for the entire document.
  • The function returns the newly created object.

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

helix.Label = "new myHelixName"

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

helix.Pitch = 2
helix.Height = 3
helix.Radius = 4
helix.SegmentLength = 21
helix.Angle = 45

You can change its placement and orientation with:

helix.Placement = FreeCAD.Placement(FreeCAD.Vector(1, 2, 3), FreeCAD.Rotation(75, 60, 30))