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Sketcher_ConstrainDiameter.md

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---
 GuiCommand:
   Name: Sketcher ConstrainDiameter
   MenuLocation: Sketch , Sketcher constraints , Constrain diameter
   Workbenches: Sketcher_Workbench
   Shortcut: **K** **O**
   Version: 0.18
   SeeAlso: Sketcher_ConstrainRadiam, Sketcher_ConstrainRadius
---

Sketcher ConstrainDiameter

Description

The Sketcher ConstrainDiameter tool fixes the diameter of circles and arcs. It cannot be used for B-spline weight circles.

Usage

See also: Drawing aids.

Continue mode

  1. Make sure there is no selection.

  2. There are several ways to invoke the tool:

    <small>(v1.0)</small> 

: If the **Dimensioning constraints** [preference](Sketcher_Preferences#General.md) is set to {{Value|Single tool}} (default): press the down arrow to the right of the **<img src="images/Sketcher_Dimension.svg" width=|x16px><img src="images/Toolbar_flyout_arrow.svg" width=x16px>** button and select the **<img src="images/Sketcher_ConstrainDiameter.svg" width=16px> Constrain diameter** option from the dropdown.

    • If this preference has a different value (and in {{VersionMinus|0.21}}): press the Constrain diameter button.

    • Select the Sketch → Sketcher constraints → Constrain diameter option from the menu.

    • (v1.0)

      : Right-click in the 3D view and select the Dimension → Constrain diameter option from the context menu.

    • Use the keyboard shortcut: K then O.

  3. The cursor changes to a cross with the tool icon.

  4. Select the edge of a circle or arc.

  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. Select the edge of one or more circles or arcs.
  2. Invoke the tool as explained above.
  3. Optionally edit the constraint value.
  4. Depending on the selection one or more constraints are added, see Notes.

Notes

Scripting

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.

⏵ documentation index > Sketcher > Sketcher ConstrainDiameter