Part Cylinder: Difference between revisions

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The [[Image:Part_Cylinder.svg|24px]] [[Part_Cylinder|Part Cylinder]] command creates a parametric cylinder solid.
The [[Image:Part_Cylinder.svg|24px]] [[Part_Cylinder|Part Cylinder]] command creates a parametric cylinder solid.


FreeCAD creates a cylinder, with a radius of 2 millimeteres and a height of 10 millimetre.
FreeCAD creates a cylinder, with a radius of 2 millimetres and a height of 10 millimetre.


By default, the cylinder is positioned with the center of the bottom circle at the origin (0,0,0). The bottom of the cylinder is on the xy-plane. Its extension in z-direction follows the positive axis value.
By default, the cylinder is positioned with the center of the bottom circle at the origin (0,0,0). The bottom of the cylinder is on the xy-plane. Its extension in z-direction follows the positive axis value.

Revision as of 06:26, 20 February 2022

Part Cylinder

Menu location
Part → Primitives → Cylinder
Workbenches
Part
Default shortcut
None
Introduced in version
-
See also
Part Primitives

Description

The Part Cylinder command creates a parametric cylinder solid.

FreeCAD creates a cylinder, with a radius of 2 millimetres and a height of 10 millimetre.

By default, the cylinder is positioned with the center of the bottom circle at the origin (0,0,0). The bottom of the cylinder is on the xy-plane. Its extension in z-direction follows the positive axis value.

Part_Box

Usage

  1. There are several ways to invoke the command:
    • Press the Cylinder button.
    • Select the Part → Primitives → Cylinder option from the menu.

Example

Part Cylinder scripting example.

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

The described placement and orientation changes are not shown because of simplicity for the given example.

Properties

See also: Property editor.

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

Cylinder

  • DataRadius (Radius): The radius of the cylinder. This defines a plane in the XY area.
  • DataHeight (Height): The height of the cylinder. This is the dimension in the Z direction.
  • DataAngle (Angle): The rotation angle of the cylinder. The rotation angle permits the creation of a portion of cylinder (it is set to 360° by default).

Prism

Scripting

A Part Cylinder can be created using the following function:

cylinder = FreeCAD.ActiveDocument.addObject("Part::Cylinder", "myCylinder")
  • Where myCylinder is the user editable name for the object.
  • The function returns the newly created object.

The label text of the object can be easily changed by

cylinder.Label = "new myCylinderName"

For example, you may wish to modify the width, length or of the start and finish vertex.

cylinder.Radius = 10
cylinder.Height = 25
cylinder.Angle = 270
cylinder.FirstAngle = 30
cylinder.SecondAngle = 45

The result is a three-quarter cylinder.

You can change its placement and orientation with:

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