PartDesign SubtractiveLoft

Description

Subtractive Loft creates a subtractive solid in the active Body by making a transition between two or more sketches (also referred to as cross-sections). Its shape is then subtracted from the existing solid.

available in version 0.17

How to use

1. Press the Subtractive loft button.
2. In the Select feature dialog, select a sketch to be used as first cross-section and click OK.
   • Alternatively, a single sketch can be selected prior to pressing the Subtractive loft button.
3. In the Loft parameters, press the Add Section button.
4. Select a sketch in the 3D view. Repeat to select more sketches.
5. Set options if needed and click OK.

Options

• Ruled surface: makes straight transitions between cross-sections. Dos not apply to a loft with two cross-sections. If not checked, transitions will be smooth.
• Closed: makes a transition from the last cross-section to the first, creating a loop.
• Press the Remove Section button to remove a sketch, by selecting it in the 3D view.

Properties

• DATALabel: name given to the operation, this name can be changed at convenience.
• DATASections: lists the sections used.
• DATARuled: see Options.
• DATAClosed: see Options.
• DATAMidplane: N/A
• DATAReversed: N/A
• DATARefine: true or false. If set to true, cleans the solid from residual edges left by features. See Part RefineShape for more details.

Limitations

• Sketches must form closed profiles.
• It is not possible to loft to a vertex.
• A cross-section cannot lie on the same plane as the one immediately preceding it.
• To better control the shape of the loft, it is recommended that all the cross-sections have the same number of segments. For example, for a loft between a rectangle and a circle, the circle may be broken down into 4 connected arcs.

Links

• Part Loft Technical Details explains how a Part Loft is created, much of its content is relevant to the PartDesign Subtractive loft.