Organize design history steps

Tutorial series: Introducing Shapr3D basics


← Back: Modify features with Design HistoryNext: Sketch and revolve →

What you'll learn

Where do you place fillets in your design history to give your motorcycle cover design edges the right curvature? Learn how to place fillets in Design History using breakpoints to reorder features.



Now we want to add a fillet. We have two different sizes of fillets that we're going to create. One's a large fillet and the other one's a small fillet. Best practice when you're working with history-based models that have a shell feature in them is that large fillets go before the shell and small fillets go after the shell. If I need to create a large fillet, I could do it the way I created this cutout. Create the fillet first.


and then move it up the tree. But I want to show you another method for doing that. If you right click on the shell feature, one of the options you get is insert breakpoint, which essentially rolls back the history tree to that point. Shapr3D rolls back after the shell. I want this breakpoint to go before the shell. So I'm going to grab this breakpoint bar and


push it up the tree one. Let's do that again, but look at it from a different point of view. I'll turn the model over, grab the break point and push it up the tree. Notice that it just suppresses the shell feature, but this allows me to grab this edge and make my big fillet. Filleting in Shapr3D is one of the easiest things that is. Just click on an edge and drag the arrow away.


If you push it in toward the model, you get a chamfer. And if you pull it away, you get a fillet. So I'm going to make this a half inch fillet. And now if we take this break point and pull it all the way down the list, look at it from the inside. You notice that I've got a shelled out fillet here, which is very nice.


Now I want to make four smaller fillets and because these are smaller, I want them to be after the shell feature. So here's how we go about doing this. I'll click on one edge and then use shift to click on the rest of the edges. Notice that Shapr3D is going to propagate the fillet along all of the tangent edges. So I can get all four edges that I need to get right here.


click and drag this and let's see what size do I need to make it. 0.1. And because this fillet comes after the shell, it doesn't affect the inside at all. One problem that you can run into is if you make a big fillet, let's just do this here for demonstration purposes. On this edge, if I make a big fillet,


At some point it's going to fail. There are two reasons here why it might fail. One is because


The corners up here are too tight and it can't come around there. And then the other reason might be that it's going to break through to the inside of the shell feature. This is also why we put big fillets before the shell and small fillets after.


We can add some color by switching to visualization. And this allows us to look at all these materials and take something like brushed copper and just drag that onto the model. So this shows you how to do some additional sketching operations, sketch text, fillets, shell, and reordering features. Thanks for watching.


Try it yourself

Motorcycle cover
Piston rod
Rod clamp
4 motorcycle wheel
Block casting


About the instructor


Matt Lombard is an independent product development professional, working in the field for 30 years. He has done a variety of work from plastics design and surfacing work to writing instructional and reference materials and writing about the engineering technology industry. Matt has also served as CAD Admin, PDM implementor, and engineering process consultant.

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