Lesson 3-12 - UCS - The User Coordinate System. THE USER CO-ORDINATE SYSTEM (UCS). THE USER CO-ORDINATE SYSTEM (UCS) When working in 3D. Control the User Coordinate System (UCS) in 2D. In ZWCAD, there are two coordinate systems. Control the User Coordinate System in 3D. Control the User Coordinate System in 3D. When you create one or more user coordinate systems, the coordinate entry is based on the current UCS. Control the User Coordinate System in 3D. You can also save and restore user coordinate system orientations. You define a user coordinate system (UCS). Help > User's Guide > Create and Modify Objects > Use Precision Tools > Work with the User Coordinate System (UCS) > Email. UCS User Coordinate System in 3. D3- 1. 2: User Coordinate System (UCS)Topics covered in this Lesson: Setting and Using the UCS . For example, if you. It's like taking a sheet of paper up off. WCS) and taping it onto the wall (UCS). The WCS is the World Co- ordinate System. This. is the way that the default X,Y and Z axes are directed when. X to the right, Y pointing up and Z. The UCS is the User Co- ordinate System. Note the direction that the X and Y axes are now pointing. Notice that the positive X Axis is now pointing. Here's how it was changed: First start the UCS command. You first choose. Next you have to. The first point is the. The second point is where you want the positive X- axis. The last point is for the positive Y- Axis. Command: UCSCurrent ucs name: *NO NAME*Enter an option . You must also be extremely careful. I would recommend using this method for. UCS work - or at least get very comfortable with. Make sure you are using Osnaps to select your points accurately. NOTE: Pressing enter immediately after entering. UCS command accepts the default of returning to the WCS. Here are examples of the other options of the UCS command. ORIGIN: This option moves the UCS based on a newly picked. It does not shift the drawing plane at all as you. ORIGIN: Command: UCSOrigin/ZAxis/3point/OBject/View/X/Y/Z/Prev/Restore/Save/Del/?/< World> : O Origin point < 0,0,0> :< PICK A POINT> Z- AXIS: This choice allows you to pick two points to define the direction of the Z- axis. First. you pick the new origin, then you pick a point for the positive. Z- Axis. Command: UCSOrigin/ZAxis/3point/OBject/View/X/Y/Z/Prev/Restore/Save/Del/?/< World> : ZAOrigin point < 0,0,0> : < PICK A POINT> Point on positive portion of Z- axis < -8. PICK A POINT> OBJECT: Using this method, you have to pick on a 2. D. object that is lying on a particular drawing plane. This gets. tricky, as you have to be aware how your positive X and Y axes. You also need to know how the object was drawn originally as this defines its plane. Command: UCSOrigin/ZAxis/3point/OBject/View/X/Y/Z/Prev/Restore/Save/Del/?/< World> : OBSelect object to align UCS: < SELECT AN OBJECT> VIEW: By choosing the view option, Auto. CAD will automatically. UCS to be aligned with your current view, keeping the. Command: UCSOrigin/ZAxis/3point/OBject/View/X/Y/Z/Prev/Restore/Save/Del/?/< World> : VX / Y / Z: By selecting either the X, Y or Z options, you. This example shows how you would rotate the UCS - 9. X axis. You'll use this one a lot in 3. D. You might need to change your UCS to draw one object, then go back to what you had it set at before. Command: UCSOrigin/ZAxis/3point/OBject/View/X/Y/Z/Prev/Restore/Save/Del/?/< World> : PRestore/Save/Del/?/: The next options are used in conjunction with. You have the option of saving a particular UCS with. You can then restore that named UCS or delete if you. Here are examples of these options: Command: UCSOrigin/ZAxis/3point/OBject/View/X/Y/Z/Prev/Restore/Save/Del/?/< World> : S (Save a UCS Setting)?/Desired UCS name: VIEW1. Command: UCSOrigin/ZAxis/3point/OBject/View/X/Y/Z/Prev/Restore/Save/Del/?/< World> : R (Restore a UCS setting)?/Name of UCS to restore: VIEW1. Command: UCSOrigin/ZAxis/3point/OBject/View/X/Y/Z/Prev/Restore/Save/Del/?/< World> : ? Down on the status bar, you have an icon that turns this setting on or off. You can also toggle this on and off with the F6 key. With Dynamic UCS turned on, you can easily draw on any surface you want. If you have a drawing like the basic building shown at the top of the page, you can draw a rectangle or box on the roof without manually setting a new UCS. The key is to look and see which face is highlighted as you move your cursor on the screen. In the images below, you can see how this works. The left side shows the 'roof' face is highlighted and the cursor has changed to reflect the new UCS. The right shows how this looks when the right side face is active. Not the change in the colored cursor while the UCS Icon remains the same. Other notes about the UCS: Be careful when choosing a UCS. Look to the. UCS icon and see that it is aligned the way you want it to be. Most of the time I will use the 3 Point UCS option and then Previous to return and then back to a different 3 point option and so on. Point gives me a lot of versatility without having to think about it too much (and concentrate on how I'm going to draw the project. Always be aware of where your UCS is located. For the geometry, use a combination of extruding and boolean operations to build it. Extra Practice: Create this drawing by setting the UCS to achieve what you need. Tip: Extrude a rectangle, set the UCS and extrude another rectangle. Video: Setting the UCS / Dynamic UCSTake the Lesson 3- 1. Quiz. For Further Thought: Remember when you were learning 2. D Auto. CAD and found that the zoom and pan tools were useful? Now that you are dealing with a 3rd dimension, you can see how changing your USC is very useful. The more complex your model gets, the more you will use the UCS. I've seen people fight with drawing something and trying to move it into the correct position rather than just change the UCS and draw it in place to begin with. At the risk of repeating myself - you need to learn 'when' to use these tools as much as 'how' to use them. Understand the User Coordinate System (UCS)You can relocate and rotate. Ortho mode, and other drawing tools. By. default, these two systems are coincident in a new drawing. The WCS origin is where the X and Y axes. All objects in a drawing file are defined by their. WCS coordinates. However, it is usually more convenient to create. UCS. 2. D tools and operations that depend on. UCS include the following. Absolute and relative coordinate entry. Absolute reference angles. Definition of horizontal and vertical. Ortho mode, polar tracking, object snap tracking, grid display. Orientation of horizontal and vertical. Orientation of text objects. View rotation using the PLAN command. Moving or rotating the UCS can make it easier. You can relocate the user coordinate system. Move the UCS by defining a new origin. Once. you have defined a UCS, you can name it and then restore it when. Click Rename.). Click OK. All UCS names are converted to uppercase. Select. the UCS name.
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