USER COORDINATE SYSTEM:


AutoCAD Command List

The USER COORDINATE SYSTEM allows you to reposition the XY plane for use with AutoCAD commands.


In many instances, AutoCAD uses the XY plane to orient the placement of certain types of items.

Example:
To place a cylinder through the RIGHT SIDE face of the model shown below, the XY plane must be aligned with the RIGHT side of a model. The UCS icon, seen in the illustrations, changes to match the new orientation of the XY plane.


orthoGraphic Options:

The orthoGraphic option allows you to select a Front, Right, Left, Top.

—Prompt: Command: Type ucs and Enter.
—Prompt: Enter and option [New/Move/ orthoGraphic/Prev/ Restore/Save/Del/ Apply/?/World] <World>: Type g for orthoGraphic and press Enter.
—Prompt: Enter an option [Top/ Bottom/ Front/ BAck /Left/ Right] <Top>: Select an option and press Enter to exit the command.


Creating a UCS with Three Points:

—Prompt: Command: Type ucs and press Enter.

—Prompt: Enter and option [New/Move/ orthoGraphic /Prev/ Restore/Save/Del/ Apply/?/World] <World>: Type in n for the New option and press Enter.

Prompt: Specify origin of new UCS or [Zaxis/ 3point/ OBject/ Face/ View/X/Y/Z <0,0,0>: Type 3 to select the 3point option and press Enter.

—Prompt: Specify a new origin point <0,0,0>:Use an Osnap or coordinate to select the position for a new 0,0,0 point (this selects the junction of the X, Y, and Z axes). NOTE: The intersection Osnap will NOT work with solid models.

—Prompt: Specify point on positive portion of X-axis <1.000,0.000,0.000>:Use an Osnap or coordinate to select the direction of the desired X-axis. NOTE: The numbers inside the brackets< > will not necessarily be the same as those shown in this example.

—Prompt: Specify point on positive-y portion of the UCS XY plane <1.000,0.000,0.000>: Use an Osnap or coordinate to select the direction of the Y-axis. The UCS icon should change position to indicate the new UCS orientation.

Example:

The FIGURE BELOW illustrates the selections that could be made to create a UCS for the RIGHT SIDE using the 3 Point option.


Creating a UCS with the View Option:

—Prompt: Command: Type ucs and press Enter.

—Prompt: Enter and option [New/Move/ orthoGraphic /Prev/ Restore/Save/Del/ Apply/?/World] <World>: Type in n for the New option and press Enter.

Prompt: Specify origin of new UCS or [Zaxis/ 3point/ OBject/ Face/ View/X/Y/Z <0,0,0>: Type v to select the View option and press Enter.

The UCS will change to match the current Viewpoint (Vpoint) configuration of the whole screen or the active viewport.


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