TABLE OF CONTENTS After completing this lesson, you will be able to:
Move the UCS to aid in the construction of the model.
Split the screen into 2 viewports.
Construct model easier using Plan view.
Understand and use Boolean operations: Union, Subtract and Intersect.
Sorry LT users, you do not have this option.
In this Lesson you are going to learn how to manipulate the UCS Origin to make constructing 3D models easy and accurate.
All objects in a drawing are defined with XYZ coordinates measured from the 0,0,0 Origin. This coordinate system is fixed and is referred to as the World Coordinate System (WCS). When you first launch AutoCAD, the WCS icon is in the lower left corner of the screen. ( An easy way to return to WCS is: Type UCS
The User Coordinate Sytem (UCS) allows you to move a temporary Origin to any location. (This is a procedure is referred to as moving the Origin .)
Objects that are drawn will always be parallel to the XY plane. (Unless you type a Z coordinate) So it is necessary to define which plane is the XY plane. You define the plane by moving the UCS origin to a surface.
Let me give you a few examples and maybe it will become clearer.
Example 1
