|Drafting → Arc tools → Arc|
|Introduced in version|
|Draft Arc 3Points, Draft Circle|
The Draft Arc command creates a circular arc in the current working plane by entering four points, the center, a point that defines the radius, the first end point and the second end point, or by picking tangents, or any combination of those. It uses the Draft Linestyle set on the Draft Tray.
Arc defined by four points, center, radius, initial point of arc and final point of arc
- There are several ways to invoke the command:
- Click the first point in the 3D view, or type coordinates and press the button in the related Line task panel.
- Click the second point in the 3D view, or enter a Radius.
- Click the third point in the 3D view, or enter a Start angle.
- Click the fourth point in the 3D view, or enter an Aperture angle.
- The primary use of the arc command is by picking four points: the center, a point on the circumference, the start of the arc and its end.
- By pressing , you can select a tangent instead of picking point, to define the base circle of the arc. You can therefore construct several types of circles by selecting one, two or three tangents.
- The direction of the arc depends on the movement you are doing with your mouse. If you start to move clockwise after the third point is entered, your arc will go clockwise. To go counter-clockwise, simply move your mouse back over the third point, until the arc starts drawing in the other direction.
- To enter coordinates manually, simply enter the numbers, then press between each X, Y and Z component. You can press the button when you have the desired values to insert the point.
- Press or click the checkbox to toggle continue mode. If continue mode is on, the Arc command will restart after you finish the arc, allowing you to draw another one without pressing the command button again.
- Hold snapping your point to the nearest snap location, independently of the distance. while drawing to force
- Hold constrain your point horizontally or vertically in relation to the center. while drawing to
- Press or the button to abort the current command.
- A Draft Arc can be edited with the Draft Edit command.
To create a Draft Arc use the
make_circle method (introduced in version 0.19) of the Draft module. This method replaces the deprecated
import FreeCAD as App import Draft doc = App.newDocument() arc1 = Draft.make_circle(200, startangle=0, endangle=90) arc2 = Draft.make_circle(500, startangle=20, endangle=160) arc3 = Draft.make_circle(750, startangle=-30, endangle=-150) doc.recompute()