Altium NEXUS Documentation


Created: June 10, 2016 | Updated: April 11, 2017

Parent page: CAMtastic Commands

The following pre-packaged resource, derived from this base command, is available:

Applied Parameters: CommandMode=CAM


This command is used to place arc objects onto the current document. The arc is drawn using three points - center, start and end.


This command is accessed from the CAMtastic Editor by choosing the Place » Arc » Center, Start, End command from the main menus.


After launching the command, you will enter arc placement mode. Placement is made by performing the following sequence of actions:

  1. Position the cursor at the required position and click to anchor the center point for the arc.
  2. Move the cursor and click again to define the required start point location. As you now move the cursor, the arc will appear, drawn from the start point.
  3. Continue moving the cursor until the required arc end point is reached and click to complete placement of the arc.
  4. Continue placing further arcs or right-click, or press Esc, to exit arc placement mode.


  1. The direction in which the arc is drawn - clockwise or anti-clockwise - is defined by the Arc Direction option, on the CAM Editor - Drawing Modes page of the Preferences dialog.
  2. You do not need to position the cursor at the location you wish to define for the end point, simply move the cursor in a clockwise (or anti-clockwise) fashion until the arc reaches the required position.
  3. The command can be canceled at any stage before clicking to define the end point, by right-clicking, or pressing Esc.
  4. Arcs will be drawn using the current DCode. Set the required DCode in the DCode field on the CAMtastic panel.
  5. Arcs will be drawn on the current layer. The current layer is displayed on the CAMtastic panel at the top of the layers list. Double-clicking on any layer in the layers list will cause it to become the current layer.


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