UGS NX Coordinate Systems

UGS NX - No Comments » - Posted on February, 25 at 11:54 am

Absolute Coordinate System

The Absolute Coordinate System is the coordinate system from which all objects are referenced. Because this coordinate system is a fixed coordinate system, the locations and orientations of every object in Unigraphics modeling space are related back to its origin. The Absolute Coordinate System (or “Absolute CSYS”) also provides a common frame of reference between part files. An absolute position at X=1, Y=1, and Z=1 in one part file is the same location in any other part file.

Work Coordinate System

The Work Coordinate System (WCS) is what you will use for construction when you want to determine orientations and angles of features. The axes of the WCS are denoted XC, YC, and ZC. (The “C” stands for “current”.)

It is possible to have multiple coordinate systems in a part file, but only one of them can be the work coordinate system.

Existing Coordinate Systems

You can create an “existing coordinate system” (CSYS) whenever you need to return to a specific location and orientation in modeling space.

Move the WCS

1. Translate the WCS

This procedure will move the WCS origin to any point you specify, but the orientation (direction of the axes) of the WCS will remain the same.

Choose FORMAT ?WCS ? ORIGIN
The Point Constructor dialog is displayed in the figure.
You can specify points by either choosing one of the icons at the top of the dialog, or by entering the X-Y-Z coordinates in the XC, YC, and ZC fields.

Most of the work will be in relation to the working coordinate system rather than the absolute coordinate system. The default is the WCS.

The default action button is Inferred Point. The name of the active icon appears above the top row of action buttons.

2. Rotate the WCS

You can also rotate the WCS around one of its axes.

Choose FORMAT ?WCS ? ROTATE
The Rotate WCS dialog is shown on the right side.
The dialog shows six different ways to rotate the WCS around an axis. These rotation procedures follow the right-hand rule of rotation.

3. Save the Current Location and Orientation of the WCS

You can save the current location and orientation of the WCS to use as a permanent coordinate system.
Choose FORMAT ?WCS ? SAVE

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