Part Helix: Difference between revisions
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A common usage for the helix primitive is for [[Thread_for_Screw_Tutorial|creating screw threads]] in conjunction with a closed profile, and the {{Button|[[Image:Part_Sweep.svg|16px]] [[Part_Sweep|Sweep]]}} operation. This process works essentially the same in the [[PartDesign_Workbench|PartDesign Workbench]] by using the {{Button|[[File:PartDesign_AdditivePipe.svg|16px]] [[PartDesign_AdditivePipe|PartDesign Additive pipe]]}} tool. |
A common usage for the helix primitive is for [[Thread_for_Screw_Tutorial|creating screw threads]] in conjunction with a closed profile, and the {{Button|[[Image:Part_Sweep.svg|16px]] [[Part_Sweep|Sweep]]}} operation. This process works essentially the same in the [[PartDesign_Workbench|PartDesign Workbench]] by using the {{Button|[[File:PartDesign_AdditivePipe.svg|16px]] [[PartDesign_AdditivePipe|PartDesign Additive pipe]]}} tool. |
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=== Properties === <!--T:3--> |
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Once you have created the helix you have the possibility to edit its parameters. |
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{| |
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| [[File:PartHelixProperty_en.png]] |
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| |
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The parameters in this menu are similar to those described above.<br /> |
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{{KEY|Base}}<br /> |
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* {{Parameter|Placement:}} allows you to move or rotate the helix |
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* {{Parameter|Angle:}} |
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|} |
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== Properties == |
== Properties == |
Revision as of 04:04, 20 February 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
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 box is positioned with the lower left corner at the origin (0,0,0). The bottom of the cube is on the xy-plane. Its extension in x, y and z direction follows the positive axis values.
Usage
- There are several ways to invoke the command:
- Press the Create Primitives... button.
- Select the Part → Create Primitives → Create Primitives... option from the menu.
- Select the Helix option from the menu.
- Set options and press Create.
- To close the dialog press Close.
Example
A Part Box object with the values of the bottom scripting example are shown here.
Notes
A common usage for the helix primitive is for creating screw threads in conjunction with a closed profile, and the Sweep operation. This process works essentially the same in the PartDesign Workbench by using the PartDesign Additive pipe tool.
Properties
See also: Property editor.
A Part Box object is derived from a Part Feature object and inherits all its properties. It also has the following additional properties:
Data
Coordinate System
- DataLocal Coord: The handedness of the helix.
Helix
- DataPitch (
Length
): The pitch corresponds to the space between two consecutive "turns" of the helix measured along the main axis of the helix. - DataHeight (
Length
): The height corresponds to the overall height of the helix measured along the main axis of the helix. - DataRadius (
Length
): The radius corresponds to the radius of the circle built by the helix by viewing the helix from the top or bottom. - DataSegment Length (
Length
): - DataAngle (
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.
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))
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