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Distance Dimension
Radius Dimension
Sketcher

Sketcher ConstrainRadiam

Menu location
Sketch → Constraints → Radius/Diameter Dimension
Workbenches
Sketcher
Default shortcut
K S
Introduced in version
0.20
See also
Sketcher ConstrainRadius, Sketcher ConstrainDiameter

Description

The Sketcher ConstrainRadiam tool fixes the radius of arcs and B-spline weight circles, and the diameter of circles.

Usage

See also: Drawing aids.

Continue mode

  1. Make sure there is no selection.
  2. There are several ways to invoke the tool:
    • introduced in 1.0: If the Dimensioning constraints preference is set to Single tool (default): press the down arrow to the right of the button and select the Radius/Diameter Dimension option from the dropdown.
    • If this preference has a different value (and in 0.21 and below): press the Radius/Diameter Dimension button.
    • Select the Sketch → Constraints → Radius/Diameter Dimension option from the menu.
    • introduced in 1.0: Right-click in the 3D View and select the Dimension → Radius/Diameter Dimension option from the context menu.
    • Use the keyboard shortcut: K then S.
  3. The cursor changes to a cross with the tool icon.
  4. Do one of the following:
    • Select the edge of a circle or arc.
    • Select the edge of a B-spline weight circle.
  5. If a driving dimensional constraint is created, depending on the preferences, a dialog opens to edit its value.
  6. A constraint is added.
  7. Optionally keep creating constraints.
  8. To finish, right-click or press Esc, or start another geometry or constraint creation tool.

Run-once mode

  1. Do one of the following:
    • Select the edge of one or more circles or arcs.
    • Select the edge of one or more B-spline weight circles.
  2. Invoke the tool as described above, or with the following additional option:
    • Right-click in the Elements section of the Sketcher Dialog and select the Radius/Diameter Dimension option from the context menu.
  3. Optionally edit the constraint value.
  4. Depending on the selection one or more constraints are added, see Notes.

Notes

  • If driving constraints are created and multiple elements that are not external geometry have been pre-selected, only the first of those receives a dimensional constraint, while between the first and the others equal constrains are applied.

Scripting

Sketch.addConstraint(Sketcher.Constraint('Radius', ArcOrCircle, App.Units.Quantity('123.0 mm')))
Sketch.addConstraint(Sketcher.Constraint('Diameter', ArcOrCircle, App.Units.Quantity('246.0 mm')))

The Sketcher scripting page explains the values which can be used for ArcOrCircle, and contains further examples on how to create constraints from Python scripts.


Distance Dimension
Radius Dimension
Sketcher

This page is retrieved from https://wiki.freecad.org/Sketcher_ConstrainRadiam

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