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In this lesson, we're going to learn how to clean up our intersecting line work. We'll do that by using the Fillet command. Fillet allows us to create rounded corners. On my screen I have some intersecting lines. We're going to use this geometry to learn how the Fillet command works. Fillet is located in the Modify panel of the Ribbon. The icon is right here. When I launch the Fillet command, AutoCAD is essentially only looking for two objects. I'll click my first object, and my second one, and AutoCAD creates a rounded corner.
Now, I know what you're thinking. This corner doesn't look very round. That's because I neglected to do one thing, I didn't set a radius. I'm going to click Undo to restore those lines, and let's try that Fillet again. I'll launch the command, and take a look at the command line. Notice I have a sub-option here called Radius. Also notice that I can see the current Radius value is zero. That's why I got a sharp corner in the previous example. I'm going to right-click and select the Radius sub-option, and I'll set my Radius to 0.75 and hit Enter.
Now, I'll select this line and this line to create my rounded corner. Let's create one more. I'm going to press the Spacebar to re-launch the command. Notice AutoCAD remembers the previous radius. I'm going to keep this value and I'll click this line and this line to create another rounded corner. Now, let's take a look at this intersection. What if I wanted this to be a sharp corner? Well, I could set my radius to zero. that would create a sharp corner. Or, if I launch the Fillet command, and hold my Shift key down, when I'm selecting my two lines, AutoCAD will create a sharp corner regardless of the value of my current radius.
Now that we have a working knowledge of the Fillet command, let's try and use it in a practical example. I'll pan this over and we'll center the geometry on screen. On my screen, I have a drawing that represents an MP3 Player. Let's use the Fillet command to round the corners of this device. I'll launch my Fillet command and I'd like to set a new radius. So, I'll right-click and select Radius from the menu. I'm going to use a value of 0.25 and I'll hit Enter. Then I'll select this line and this one.
Notice that AutoCAD drops me from the command. One of the problems with Fillet is that AutoCAD always assumes you only want to do one. Let me show you how we can quickly create the other three fillets. I'll re-launch the command. My radius is obviously good. Notice I have a sub-option down here called Multiple. I'm going to right-click and select Multiple from the menu. Then I'll select this line and this line. Notice I'm still in the command. I can then select this line and this line, this line and this line.
Using the Multiple sub-option, I can create multiple fillets until such time as I press the Esc key to cancel out of the command. Let's take a look at the screen quickly. I'm going to zoom in a little bit. Maybe I'd like to fillet all of these corners as well. This geometry was created using the Rectangle command. So, this entity is considered a polyline or a multi-segmented line. I'm going to press Esc to deselect this entity. Then I'll launch the Fillet command. I'd like to set a new radius, so I'll right-click, select Radius, and we'll use a radius of 0.2 this time.
Now, take a look at the command line. Notice I've got an option here called Polyline. I'm going to right-click and select Polyline from the menu. By using the Polyline sub-option, AutoCAD will apply the fillet to every corner of my polyline. Fillet is a tool that gives us more control over our interesting line work. Whether our design requires a rounded corner or a sharp corner, we can accomplish anything we need by using the Fillet command.
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