PartDesign SubtractiveEllipsoid

Menu location
PartDesign SubtractiveEllipsoid
Part Design → Subtractive Primitive → Subtractive Ellipsoid
Workbenches
PartDesign
Default shortcut
None
Introduced in version
0.17
See also
PartDesign CompPrimitiveSubtractive, PartDesign AdditiveEllipsoid

Description

Inserts a subtractive ellipsoid in the active Body. Its shape is subtracted from the existing solid.

On the left: active body (A) shown in grey and subtractive ellipsoid (B) shown in transparent red; result on the right.

There are several ways to invoke the tool:
- Press the Subtractive Ellipsoid button. Note: the Subtractive Ellipsoid is part of an icon menu labelled Subtractive Primitive. After launching FreeCAD, the Subtractive Box is the one displayed in the toolbar. To get to the Ellipsoid, click on the down arrow besides the visible icon and select Subtractive Ellipsoid in the menu.
- Select the Part Design → Subtractive Primitive → Subtractive Ellipsoid option from the menu.
Set the Primitive Parameters and Attachment.
Click OK.
An Ellipsoid feature appears under the active Body.

The Ellipsoid can be edited after its creation in two ways:

Double-clicking it in the Tree View, or by right-clicking and selecting Edit Primitive in the context menu; this brings up the Primitive Parameters.
Via the Property View.

DataAttachment: defines the attachment mode as well as the Attachment Offset. See Part EditAttachment.
DataLabel: label given to the Ellipsoid object. Change to suit your needs.
DataRadius1: the radius value along the ellipsoid's vertical axis; by default, parallel to the Z-axis.
DataRadius2: the radius value along the ellipsoid's length; by default, parallel to the X-axis.
DataRadius3: the radius value along the ellipsoid's width; by default, parallel to the Y-axis. At the default value of zero, the ellipsoid forms an oblate spheroid.
DataAngle1: (labelled V parameter in the Primitive Parameters) lower truncation of the ellipsoid, parallel to the circular cross section (-90 degrees in a full spheroid)
DataAngle2: (unlabelled in the Primitive Parameters) upper truncation of the ellipsoid, parallel to the circular cross section (90 degrees in a full spheroid).
DataAngle3: (labelled U parameter in the Primitive Parameters) angle of rotation of the elliptical cross section (360 degrees in a full spheroid).

Structure tools: Part, Group
Helper tools: Create body, Create sketch, Attach sketch, Edit sketch, Validate sketch, Check geometry, Create a shape binder, Create a sub-object(s) shape binder, Create a clone, Create a datum plane, Create a datum line, Create a datum point, Create a local coordinate system

Modeling tools:
- Additive tools: Pad, Revolution, Additive loft, Additive pipe, Additive helix, Additive box, Additive cylinder, Additive sphere, Additive cone, Additive ellipsoid, Additive torus, Additive prism, Additive wedge
- Subtractive tools: Pocket, Hole, Groove, Subtractive loft, Subtractive pipe, Subtractive helix, Subtractive box, Subtractive cylinder, Subtractive sphere, Subtractive cone, Subtractive ellipsoid, Subtractive torus, Subtractive prism, ‎Subtractive wedge
- Boolean: Boolean operation

Dress-up tools: Fillet, Chamfer, Draft, Thickness
Transformation tools: Mirrored, Linear Pattern, Polar Pattern, Create MultiTransform, Scaled

Extras: Sprocket, Involute gear, Shaft design wizard
Context menu: Set tip, Move object to other body, Move object after other object, Appearance, Color per face
Preferences: Preferences, Fine tuning

Getting started
Installation: Download, Windows, Linux, Mac, Additional components, Docker, AppImage, Ubuntu Snap
Basics: About FreeCAD, Interface, Mouse navigation, Selection methods, Object name, Preferences, Workbenches, Document structure, Properties, Help FreeCAD, Donate

Help: Tutorials, Video tutorials
Workbenches: Std Base, Assembly, BIM, CAM, Draft, FEM, Inspection, Material, Mesh, OpenSCAD, Part, PartDesign, Points, Reverse Engineering, Robot, Sketcher, Spreadsheet, Surface, TechDraw, Test Framework