Join Gabriel Corbett for an in-depth discussion in this video Reference geometry, part of Cert Prep: Certified SOLIDWORKS Professional (2015).
- Sometime while working with more complicated assemblies, we're going to need to add in some reference geometry. Now, adding reference geometry to assemblies is almost exactly the same as adding it to parts. So if you click under the reference geometry tab right here at the top under assembly, notice I have plane, axis, coordinate system, point, center of mass and mate reference. So, starting off with plane, most of the time when you create a plane, it's going to ask you for certain references; that's going to be a plane, a point or a line. If I just choose one of those, I can choose a plane and it just make an offset from that plane.
If I end up choosing a couple different things, it's going to allow me to hinge that off of a certain- or maybe add an angle to something that I can adjust this angle here by saying this face, I'm giving it a 138 degree angle from that edge. That's rotating around that around that edge. So that's a couple quick ways to add reference planes to your part. I can also add planes by choosing individual points. If I cancel out of that, do it again, I can say I want a plane and I want this plane to be between this point right here, this point right here, and that point.
Oh, hold on. So I guess I selected a face by accident. I wanted to choose a point right there. It keeps wanting to choose that face. Let's spin that around and choose not this line here but this point here and this point right there. So there's my three points you can see and I created a plane between those. So a couple quick ways to create some reference geometry. Jumping back up here to reference geometry, I'll just choose axis again. This time, I have a bunch of different options of how I want to create this.
Do I want to create it along an axis that's already existing? An edge or a line, two planes, two points; a bunch of different options here. One of the quickest ways is creating an axis just right in the center of a cylinder. Sometimes you might want to spin or rotate around something like that that can create that axis just that easily. So a bunch of options for creating those. And make sure if you're not seeing them, click under view and make sure you're seeing axis or view, and make sure you're seeing planes. There they are. Reference geometry one more time. Coordinate system. For some reason, if you needed to move the coordinate system in your model to something other than where the origin is, I can choose a point; so say up here at this point right- let's see.
Let's try this point right over here. Make sure I'm choosing the point and not actually the plane or the line. And you can see the XYZ coordinate system. Then I can define where I want my X coordinate system to lie along, so I'm going to choose this edge right here; notice it angles down to that, and then my Y coordinate system, I'm going to say I want my Y going in this direction right here, so I'm going to choose that edge. Now I can flip any one of these, so I have Z going up, I can have X going this way, and I have Y going that way. So get the coordinate system in the right orientation that you're looking for around that point, click on ok, and now I have a new coordinate system here.
Now, if I want to, I can go over here to mass properties, and I can define these mass properties, or the center of mass, around a coordinate system. So by default, it's just choosing the origin. But I can also choose this new coordinate system, and as soon as I do, notice the center of mass change in relationship to that new coordinate system. So that's one reason you might want to create your own coordinate system. Once you're done with that, cancel out, ok, and then under reference geometry again I can just add a point or I can even add a center of mass to the design and you'll see the center of mass, I click on view, show center of mass, and you can see it's right there.
So it's kind of a handy little thing to keep on your model so you can see where things are in relation to the center of mass, especially if you're trying to balance something out. So those are your basics for reference geometry. The last one I didn't cover would be this point, and that's all that is, is going to be defining a point using either an arc or center of a face, an intersection or a projection so, in this case here, let's click on center of face, and I'm going to choose- I'm going to choose that face right there and notice it gives me a little point right in the center, and now I have a point I can define something around.
So that's the basics for reference geometry, adding it to an assembly. And again, I can do exactly the same thing by adding it to a part.
He also breaks down the three segments of the test (part modeling, configurations, and assemblies), providing strategies that will help you pass each section. At the end of the course, there are two sample exams to practice what you've learned.
- CSWP requirements review
- Working with sketch entities, tools, and relations
- Using the boss and cut features
- Performing sweeps and lofts
- Smoothing corners with Fillet and Chamfer
- Creating linear and circular patterns
- Setting up equations
- Creating multibody parts
- Setting mass properties
- Working with materials and constraints
- Inserting components
- Setting up reference geometry
- Arranging features to change the part
- Working with suppression states
- Using a design table to build configurations
- Establishing standard drawing views
- Annotating your drawings