PartDesign SubtractiveLoft: Difference between revisions

From FreeCAD Documentation
No edit summary
No edit summary
(2 intermediate revisions by the same user not shown)
Line 14: Line 14:
{{GuiCommand
{{GuiCommand
|Name=PartDesign SubtractiveLoft
|Name=PartDesign SubtractiveLoft
|MenuLocation=Part Design → Subtractive loft
|MenuLocation=Part Design → Create a substractive feature → Subtractive loft
|Workbenches=[[PartDesign_Workbench|PartDesign]]
|Workbenches=[[PartDesign_Workbench|PartDesign]]
|Version=0.17
|Version=0.17
Line 50: Line 50:


<!--T:8-->
<!--T:8-->
* '''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.
* '''Ruled surface''': makes straight transitions between cross-sections. Does 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.
* '''Closed''': makes a transition from the last cross-section to the first, creating a loop.



Revision as of 10:16, 28 May 2021

PartDesign SubtractiveLoft

Menu location
Part Design → Create a substractive feature → Subtractive loft
Workbenches
PartDesign
Default shortcut
None
Introduced in version
0.17
See also
PartDesign Additive loft, PartDesign Subtractive pipe

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.

Usage

Dialog-based workflow

  1. Press the Subtractive loft button.
  2. In the Select feature dialog, select a sketch to be used as base profile object 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 the next sketch in the 3D view. Repeat to select more sketches in the order you want them to be lofted through. (You can change the section order any time later in the loft dialog by dragging sections in the list to the desired position.introduced in version 0.19)
  5. Set options if needed and click OK.

Selection-based workflow

introduced in version 0.19

  1. Select several sketches. It is hereby important in what order you select them:
    • The sketch selected at first will become the base profile object in the next step
    • The sketches selected after the first one will become the loft sections. Also here the selection order is important: The sketch selected as second will become the first loft section, the one selected as third becomes the second section and so on. (You can change the section order any time later in the loft dialog by dragging sections in the list to the desired position.introduced in version 0.19)
  2. Press the Subtractive loft button.
  3. Set options if needed and click OK.

Options

  • Ruled surface: makes straight transitions between cross-sections. Does 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.

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