Project edges vs. including them

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Project edges versus including them.

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In this video, we’ll explore a 3D sketch, project a face into a sketch, include 3D geometry in a sketch and use Move/Copy.

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In Fusion 360, we want to carry on with our gear reduction housing solids.

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We've taken a look at creating a lot of different 2D sketches.

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All of these have been created either on the face or on a plane that we created or one of the existing origin planes.

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Now we want to talk about 3D sketching.

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We're not going to be saving any of our 3D sketch work,

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but I think it's important that we do discuss the options as they can become extremely helpful in certain cases.

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To get started, I want to begin by selecting the end of this bearing face that we created, right clicking and starting a new 2D sketch.

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When we start a new sketch in the sketch palette on the right hand side, you'll notice that we have something called 3D Sketch.

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Depending on your user preference settings, 3D Sketch may automatically be on or off in your sketch palette.

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If it's off, let's go ahead and turn it on now and talk about 3D sketching.

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I'm going to rotate my model a little bit and I'm going to begin by going to my Create drop-down and taking a look at Project and Include.

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We've already used project to bring sketch entities into another sketch,

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but we can also use it to bring faces and edges from other solid bodies into our current sketch.

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For example, if we select project and we grab this entire face, it's going to grab the internal and external edges that belong to that face.

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The same thing, if we grab one of the other ones, you can see the preview on the screen in red, showing us exactly what's going to be created.

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If we rotate the part around and we select the back face, notice that it's giving us everything that's included with that face.

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What I want to do in this case is select this front face and project that onto my current sketch plane.

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Also note that we can use the Bodies option or specified entities.

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When I say, OK, I now have these purple sketch entities that have been projected.

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Let's go ahead and view Project/Include again.

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And let's take a look at the next option in this case Include 3D Geometry.

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We're going to select Include 3D Geometry and we're going to select the same geometry we just used to project.

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But notice that it's not giving us the same face selection and the same preview.

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What it's actually doing is it's grabbing entire faces or edges and it's going to be including them in 3D.

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For example, if I select this arc or this face, notice that what I'm actually doing is I'm getting those entities in my 3D sketch.

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So it's not bringing them to my 2D sketch plane.

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However it is including them and keeping them as a 3D element.

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Let's bring back Body 5 and let's go back to our Create drop-down and Project/Include.

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We can see that we have other options such as Project To Surface and Intersection Curve.

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We also have an option for Intersect which will allow us to grab the intersection on our current sketch plane.

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To view that, let's finish this current sketch and let's start a new sketch on this face.

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When we create a sketch on this face and we go to our Create Project/Include and intersect,

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we can select a face that doesn't have a sketch entity on it.

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And using the current sketch plane, we can create those entities based on the intersection with our selected sketch plane.

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This can be a face on a body as long as it's planar or it could be a specific plane.

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Now in this case, we also have those exact same entities that we could project from the top or the bottom.

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But that doesn't always happen.

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If you have a drafted body or something with some curvature, you might need to use the Intersect option.

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While we are here talking about Intersect, there is another option in the sketch palette called Slice that will create a temporary section view.

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This doesn't create the edges for you but it allows you to cut through the solid geometry.

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So that way you can see exactly what's on the current sketch plane.

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This can be extremely handy as you need to work inside or outside of certain geometry.

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It can be problematic to see through the solids.

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So using that Slice option can be extremely helpful.

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The next thing that I do want to talk about with 3D sketching before we turn that off is actually creating sketch entities.

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Using our Line tool, you'll notice that we have a different coordinate system display because we are using 3D sketching.

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I can begin sketching in 2D but I can also switch to different planes.

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For example, I'm now sketching in the Z direction,

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and I can switch again to the XY and I can begin working in XY and snapping to those various coordinate systems.

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I can then move into the YZ plane and I can come back down.

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I can also snap to geometry in 3D.

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I’m going to hit Escape and notice that we now created some sketch entities that are actually in 3D by using those options.

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So it is important to note that 3D sketching is available and you can do things like Project or Include 3D entities.

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But you can also create them on the fly as long as you turn that option on.

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Let's go ahead and turn 3D Sketch off, finish the sketch.

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And we want to close this file without saving.

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It's important to play around with all these tools.

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But for our specific design, using those options for 3D sketching are not going to provide us any benefit.

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But it is important that we play and understand what they do before we move on.

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So I'm not going to save this, but I am going to continue on with that same design in the next video.