EAGLE Help

ARC


Function
Draw an arc of variable diameter, width, and length.

Syntax
ARC • • •
ARC width • • •
ARC CW width • • •
ARC CCW width • • •

Mouse
Right button changes orientation.
Center button changes active layer.

See also CHANGE, WIRE, CIRCLE

The ARC command, followed by three mouse clicks on a drawing, draws an arc of defined width. The first point defines a point on a circle, the second its diameter. Entering the second coordinate reduces the circle to a semi-circle, while the right button alters the direction from first to second point. Entry of a third coordinate truncates the semi-circle to an arc extending to a point defined by the intersection of the circumference and a line between the third point and the arc center.

The parameters CW and CCW enable you to define the direction of the arc textually. This is useful for script files.

CW: Defines curve sense to be clockwise
CCW: Defines curve sense to be counter clockwise

Line Width

The parameter "width" defines the thickness of the drawn line. It can be changed or predefined with the command:

CHANGE WIDTH width;
The adjusted width is identical to the line width for wires.

Arcs with angles of 0 or 360 degrees or a radius of 0 are not accepted.

Arcs are not treated as parts of signals, so they are not recognized by the DRC program.

Example for text input:

GRID inch 1;
ARC CW (0 1) (0 -1) (1 0);
generates a 90-degree arc with the center at the origin.
Index Copyright © 1999 CadSoft Computer GmbH