From the course: AutoCAD 2019 Essential Training

Isometric views with elliptical arcs - AutoCAD Tutorial

From the course: AutoCAD 2019 Essential Training

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Isometric views with elliptical arcs

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- We've got a new drawing for you now called IsometricViews.dwg and that's exactly that we're going to look at now is creating a simple Isometric View. But we're going to utilize a command that we've covered in the previous video. Which is the ellipsoidal arc command. When you created an ellipse, you create an ellipse using two axes, a major and a minor axis to give it ellipsoidal shape. When you're working in isometric view, you tend to work with the 30 degree or 60 degree rotation so that it looks like it's three-D but it's not, it's a two-D interpretation of a three-D view. That's what isometric views are all about and also you can work with perspective and things like that as well. Now you'll notice in this particular drawing, we have two vertical lines opposite each other left and right. What we're going to do is we're going to create an isometric view or a little dumpy cylinder using the ellipse command and ellipsoidal arc command. And you'll see what I mean when we actually finish the drawing, on how it creates a very simple isometric view. So making sure you're using the isometric layer which is there in the last panel in the home tab on the ribbon. Go to the draw panel and click on the file for ellipses and select axis end that one there. Now we're going to use our snap points, so make sure your object snaps are on, we're going to go from end point snap there click to end point snap there click. So that starts our ellipse, now we're not going to specify the other axis. You'll notice on the command line in the brackets there, we go rotation. I can right click that brings up on the short coming menu and I select rotation, so not I'm going to specify the rotation around the major access. And this is going to be 60 degrees which is one of our isometric angles to create an isometric view. So I'll type in 60 degrees, so basically that's the circle rotated 60 degrees about it's major axis and what you'll find when you press enter is there's our ellipse in a nice isometric rotation angle. So you can now see the top of our dumpy cylinder in our isometric view. We go back now to the ellipse command in the draw panel and I select axis end again and come into the drawing area. Notice on the command line at the bottom of the screen I've got arc or center. Right click, you can select those on the short come menu, select arc. Now drawing an ellipsoid arc is exactly the same work flow process as drawing just a regular ellipse. So I'm going to specify end point there and end point there like so, and there's our ellipse. Then again I right click again and select rotation like I did with the ellipse on the top of the cylinder. Select rotation and type in 60 again and press enter. Now this time it doesn't finish the command, because it's asking you now for the start angle. Where you're going to start and then finish your ellipsoidal arc. Now we're going to utilize our object snaps for this, make sure you go counter clock-wise it's an arc. So by default autocad does arcs in a counter clock-wise direction. So I'm going to go from here, this end point snap click and as I draw now can you see the arc coming around, I go to this end point snap and I click and there's my ellipsoidal arc, but more importantly, there's my nice isometric view of my dumpy cylinder that I've created using just two vertical lines and the ellipse arc command.

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