10. UCS - User Coordinate System

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10. UCS - User Coordinate System

To work in AutoCAD is necessary to know the characteristics of a UCS (User Coordinate System) and work with them because without the knowledge of how to set the UCS is almost impossible to work in AutoCAD

View UCS-a in 2D i 3D


Toolbars UCS and UCS II coordinate system AutoCAD 2007

 
Here I will not describe all the icons (buttons) for positioning a UCS-but only some of the most important. (more about UCS icons and their specific functions in the following topics) First we must distinguish between the
command ORIGIN which locks and unlocks the positioning of a UCS (the same on and off the View => Display => UCS icon => ORIGIN).

When the active option Origin (a check mark next to them) then we have "locked" position the UCS and USC
will still appear on the site of positions that we set it up, no matter how much zoom the view of the working drawings of the window, unless the positional point when Zoom (magnified view of the drawing) go out of the window frame, then we will show the UCS in the lower left corner of the window.

If we Origin option off then we will be UCS run in the bottom left corner of the window. Depending in which respect we will vary the UCS (2D, 3D Vireframe, 3D Realistic Visual Style and 3D Conceptual Visual Style)

If we shrank the UCS work flow and we want to return to the starting position then using the World UCS icon (2) we can do the same, and UCS will be positioned in the left lower corner of the window. This icon, we have both the Toolbar toolbar (UCS and UCS II). When move the mouse pointer over the icon will show you her name.

Use the first icon on the toolbar1 UCS, UCS positioning by clicking on the icon called UCS and then the X axis direction and then in a direction of Y axis at any point. The first course will determine the position of the x-axis (in this case the Origin should be included, then a check mark next to View. (View => Display => UCS icon =>
ORIGIN). Observe the activity functions of ORTHO and SNAP. If Ortho is turned on then you will not be
able to position the UCS at an angle and if SNAP function is activated then you will not be able to position the starting point exactly where you want it to AutoCAD for Snap-step and constantly dodge your precise intention. It looks like this
Rotate UCS-using a button that can be seen in the picture below. In the case of UCS rotated at an angle and then turn on Ortho mode all drawing lines follow the axis X and Y. (imagine that you just rotate the paper on which you draw in 2D)

If you want to UCS back to the starting position click on the WCS


Use the icon No.  position ourselves Origin UCS at a particular point (Origin active - clip included) by first
clicking on the icon and then to a certain point, UCS, and we will be positioned at the respective point in the plane, now we can rotate the axis X or Y or Z.

Use the icons No. 4  Z-Axis Vector by using the 3D drawing UCS positioned so that clicking on the icon and then to the point where you want to set the UCS hold the left mouse button and then determine the direction
of Z axis by dragging the mouse pointer in the direction of Z axis and click to end. It looks like this


Use the icons No. 5   3 Point that we use the 3D drawing UCS positioned so that clicking on the icon and then to
the point where you want to set the UCS and then click on another point and then the third point (we take into account the direction of Counter Clockwise). It looks like this

These three icons are used to us to rotate the UCS around a particular axis. Each individually. We have positioned the UCS in 3D drawing, click on the icon and then the axis around which we rotate the UCS, for example, about the X axis and then determine the rotation angle (taking into account the direction of Counter Clockwise).
I'm here in the pictures below rotate the UCS around  the X axis by 75 degrees counterclockwise-clockwise
so that we can raise the Y-axis (out of plane) to 75 degrees and with that also rotate the Z axis by 75 degrees for rotation performed around the axis X.


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