Creating an Offset and Rotated Relative CS

To create a new relative CS that is both offset and rotated from an existing CS:

1. In the History Tree, select the CS upon which you want to base the new relative CS, making it the working CS.
2. Click Modeler> Coordinate System> Create> Relative CS> Both or, on the Draw ribbon tab, click Relative CS> Both:

   

3. Depending on your Relative Coordinate System Creation Mode choice (Tools> Options> General Options – 3D Modeler> Drawing), or whether you press F3 or F4, you can specify the origin and axes in one of the following two ways:
   • Axis/Position option selected, or F3 pressed – Use one of the following coordinate entry methods:
     • Specify the Origin, X-axis, and XY plane graphically (click to select), as follows:
       1. Use the cursor to click the Origin point. You can see the coordinate information in the Measure Data window.

          

          To select a point that does not lie in the current plane, use the Movement Mode commands or choose a different drawing plane.

       2. In the same manner, click a point to define the X-axis.
       3. Select a third point, one lying on the XY plan that's not on the X-axis, to complete the CS definition.
     • Specify the Origin, X-axis, and XY plane numerically in the Status Bar, as follows:

       

       1. In the Status Bar, choose the type of coordinate system from the rightmost drop-down menu (Cartesian, Cylindrical, or Spherical).
       2. Select either Relative or Absolute coordinates from the other drop-down menu.
       3. Type the CS origin coordinates in the X, Y and Z (or dX, dY, and dZ) text boxes.
       4. In the same manner, type the coordinates of a point on the X-axis and press Enter.
       5. Type the coordinates of a third point, one lying on the XY plan that's not on the X-axis, and press Enter to complete the CS definition.

       You do not need to specify the Z-axis. It is automatically calculated to be perpendicular to the new XY plane.

   • Euler angle option selected, or F4 pressed:
     1. In the Set Origin and Euler Angles dialog box, specify the X, Y, and Z coordinates of the Origin and select units for each from the drop-down menus.
     2. Select the preferred Euler Rotation Convention (ZYZ or ZXZ).
     3. >Specify the Phi, Theta, and Psi values and select units for each from the drop-down menus.

        

     The new relative CS is created. It is listed in the History Tree under Coordinate Systems. It automatically becomes the working CS; objects that you draw hereafter will be based on the coordinates of this relative CS. Default planes are created on its XY, YZ, and XZ planes.