Constructing Centerlines

Use the Centerline command to construct Centerlines. You can set the extension for Centerlines to exceed the entities which define the contour.

The specific LineStyle for Centerlines is assigned automatically.

Centerlines are created between pairs of Lines, Arcs, and PolyLine segments.

Linear contours need not be parallel; the resulting line represents a bisecting line in this case. The two entities can be of different lengths.

Selected pairs of Arcs must be concentric.

You can create Centerlines continuously in one command. When you select pairs of PolyLine segments one after the other, the resulting centerline segments are joined to one entity, whereas each pair of lines or arcs creates separate Centerlines.

The Centerline represents an entity of its own.

To construct Centerlines:

1. Do one of the following:
   • On the ribbon, click Home > Annotations > Centerline.
   • On the menu, click Draw > Centerline.
   • Type Centerline.
2. Specify the first entity.
3. Specify the second entity of the same type (linear or curved).

   The Centerline is created between the pair of entities.

4. Repeat steps 2 and 3 for more pairs of Lines, Arcs, or PolyLine segments.

   To undo the previously created Centerline, specify the Undo option.

5. Press Enter.

To set Centerline extensions:

1. Do one of the following:
   • On the ribbon, click Home > Manage > Options.
   • On the menu, click Tools > Options.
   • Type Options.
2. Click Drawing Settings.
3. Expand Centerline Settings.
4. In Centerline Extension, specify a value for the extension.

   The default value is 0.25 (if you use an ANSI-based template drawing) or 2.5 (if you use an ISO-based template drawing) drawing units.

5. Click OK.

  Note: Use EntityGrips to modify the length of Centerlines which preserves their orientation.

Access

Command: Centerline

Ribbon: Home > Annotations > Centerline

Menu: Draw > Centerline