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SolidWorks is the world leader in 3D software for product development and design. Start creating manufacturing-ready parts and assemblies, as well as detailed drawings and bills of materials. In this course, author Gabriel Corbett shows how to create 2D sketches that will become the basis for your 3D models. You'll use the Extrude and Revolve tools to turn 2D sketches into 3D parts, then create more complex geometry with sweep and lofts. Then learn how to use the cut features to remove material and shape parts, and use mirroring, patterning, and scaling to modify parts. Next, you'll combine parts into movable assemblies and subassemblies. Finally, you'll create accurately annotated drawings, complete with itemized bills of materials that relate the final parts and assemblies to a manufacturer.
Arcs are segments of a circle and can be created in much the same way. Arcs do need more information than a circle because you need to define where the beginning and ending points are in addition to the sine location and radius. Let's take a look. Up here on the Sketch toolbar, we can see we have a Arc tool and we've got three different types of arcs we can use. We can use a center point, tangent, or the three point arc. So let's go ahead and start with the center point arc. Now almost pretty simple. Just click where we want the center point to be. In this case I will choose the origin and draw where your radius must basic in to begin that right now.
I'll click OK and then you can define how much of that circle you would actually like to draw. So it is pretty handy to determine a length and go one direction or the other direction and when you halved with the angle. Go ahead and click on the left mouse button to finish that arc segment. Now, if you want to define that a little further, what you can do is use some center lines. Go from the origin to the two end-points. What you can do is you can either define the angle. In this case here I've got a vertical line and a horizontal line. But if you didn't want to use that you could delete the horizontal line, and maybe you could adjust that angle of the arc using that.
In fact, you can even add maybe another. Set our line here, and give it an angle, between the two, maybe 30.0, and now define that size. And then you can give it a radius, we'll say 1.5, and that fully defines that arc in space. Next, is a tangent arc. So tangent arc needs to have some line segment to start from to be tangent two. So in this case here, I have this nice line here. I start right at the end point, and I'll draw out an arc. So notice it sticks to the cursor, and I can drag that around and it gives me both the angle as well as the radius.
And I can actually bring that all the way around and snap to another end point to finish out that arc. Then I can move this other line around if I need too, or I could adjust the arc. If I want to make this arc and this line tangent as well I can click on the arc, hold on Control chose the line and then chose tangent. Now they all work as a team and you got two lines that are tangent to an arc. If I look up here under the 3 Point Arc, 3 Point Arc is great for creating maybe fills between these two circles. So I'll click on one of them, click on the other one, and then I can drag out the arc to look about appropriate.
But notice these are not tangent. So then I can always go back, hold down Ctrl, select the two entities and say, Make Tangent. And do the same thing over here. Make tangent, then I've got two arcs that automatically move around the radius, and I can control the arc between the two circles. A really handy way to do that, and in fact, I can do the same thing down here, and then I can trim away this inside arc to make a different type of shape. A lot of different things we can do to work with these arcs. Here's another example. If I choose the three-point arc again, I can start from one line segment.
I can drop it down to the endpoint of the other. And I can drag out this radius to that circle. Click where you're happy. And then if you have maybe the center point of that circle, if you'd like to maybe make coincident with this point here. I can choose both those points, and I could say, just go ahead and merge those points together. I could do the same thing with the tangent arc. Go back up here to tangent arc, start from this point here, and spring it all the way around to this point here. And it automatically adds a tangency between the two different lines. It's a really handy way to do that. The last thing I want to point out is if you're using the Line command, make a straight line segment and click.
If I go forward and actually make another line, it'll just continue making straight lines. However, one little sneaky trick behind the scenes is if you actually go back on top of the original line. When you come back out, it actually turns it into a tangency arc, it makes a really quick way to design things using straight lines and tangent arc segments. So you can click and then it turns right back into the line tool. Or again, if you go back onto that arc, you come back out, you can, again, make another tangent arc to it. So a really handy way. And keep in mind, if you do that starting with the line, whichever way you come out of that line, you come back on it Then you come back out on a corner, it'll be tangent in that direction.
So make sure you're coming off that endpoint in the direction of tangency you'd like to use. Arcs are helpful for creating smooth-flowing shapes and appealing aesthetics. They're just segments of a circle, and sometimes starting with a circle is a good way to define the lcoation for complex arcs.
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