Tool Elliptical arc
For the creation of the elliptical arcs in AutoCAD responds option Arc Ellipse command. Call this option in the following ways:
- from the Draw menu line - a line the Ellipse - the drop-down list Arc line;
- Home tab of the ribbon tools - in Draw group - button Elliptical arc;
- toolbar Draw - button Elliptical arc;
- or to register the name of the team in the Ellipse command prompt, and then select Arc.
How to build an elliptical arc in AutoCAD
First, the construction of an elliptical arc is reduced to constructing a complete ellipse, and point to the final stages of what part of the ellipse must leave. All the methods of constructing a complete ellipse, we have considered in the preceding article, however, consider how to draw an elliptical arc in AutoCAD, one of the semi-axis of the ellipse and the axes (available by default).
Call the Ellipse command in AutoCAD, then choose the Arc option. prompted the command prompt:
Specify axis endpoint of elliptical arc or [Center]:
In response to the request shall indicate the first endpoint of the elliptical arc axis click the drawing. AutoCAD will display the following prompt:
Specify other endpoint of axis:
We set the second axis endpoint click in the drawing. AutoCAD prompts you:
Specify distance to other axis or [Rotation]:
Specify the length of the second half-line click in the drawing. AutoCAD will display a full ellipse. The yellow dashed line will follow from the center of the ellipse to the cursor, crosshair. You will see the following prompt:
Specify start angle or [Parameter]:
Now we need to consistently specify two boundary angle - start angle and end angle. By default, angles are measured from the horizontal line directed to the right (positive X-axis direction), counter-clockwise. The major axis is not located horizontally, so not to introduce additional corners and avoid confusion, the angles are measured from the boundary of the major axis of the ellipse counterclockwise. Start Angle Defines the first endpoint of the elliptical arc.
You can specify the angle by typing its value in the command line or by selecting a point on the drawing. Specify a start angle of 90 degrees. prompted the command prompt:
Specify end angle or [Parameter/Included angle]:
End angle defines the second endpoint of the elliptical arc. Let us end angle by entering its value in the command line 180. As soon as you set end angle, elliptical arc in AutoCAD will be plotted, the Ellipse command completes execution.
Video "Constructing an ellipse, ring in AutoCAD" (Russian)