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Rhino 4 Essential Training

Editing corners with Fillet and Chamfer


From:

Rhino 4 Essential Training

with Dave Schultze

Video: Editing corners with Fillet and Chamfer

In this video, we will explore fillets and chamfers and how they can be used on literally every type of entity, from curves, to surfaces, to solids. If you are not familiar with the difference between the two, a fillet is a rounded or curved corner and a chamfer is a straight or angled corner, wherever two curves or edges meet. So, let's get started. We have got this head profile already prepped for an extrusion, but I am going to recommend that we fillet the curve first. This is a concept I call "prefilletize." So, we are going to go to the Curve menu before we extrude and fillet those corners to round them off.
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  1. 4m 13s
    1. Welcome
      1m 1s
    2. Using the exercise files
      28s
    3. Recommended hardware
      2m 44s
  2. 19m 8s
    1. Understanding the three types of entities: curves, surfaces, and solids
      5m 51s
    2. Comparing Bezier curves, B-splines, and NURBS objects
      3m 35s
    3. Comparing isocurve surfaces and mesh surfaces
      4m 50s
    4. Setting measurement units and tolerance
      4m 52s
  3. 18m 16s
    1. Introducing the viewport
      3m 20s
    2. Using construction planes to anchor model design
      5m 27s
    3. Changing the way a model is viewed using shading modes
      3m 11s
    4. Navigating the viewport with pan, zoom, rotate, and reset controls
      3m 24s
    5. Exploring help options
      2m 54s
  4. 29m 48s
    1. Understanding Rhino's command philosophy
      3m 10s
    2. Using toolbars and docking buttons to a toolbar
      3m 33s
    3. Navigating the geometry menus using a "department store" analogy
      3m 35s
    4. Using the command line and status bar to get feedback
      4m 56s
    5. Modifying the nudge control and setting other preferences
      6m 54s
    6. Using the Properties window
      3m 1s
    7. Opening and saving files
      4m 39s
  5. 14m 24s
    1. Creating basic objects: curves, surfaces, and solids
      4m 22s
    2. Performing basic transformations
      3m 14s
    3. Selecting objects
      3m 37s
    4. Organizing a project using layers
      3m 11s
  6. 21m 18s
    1. Understanding lines and polylines
      4m 10s
    2. Building rectangles and polygons
      5m 12s
    3. Creating arcs, circles, and ellipses
      7m 8s
    4. Drawing freeform curves
      4m 48s
  7. 47m 36s
    1. Comparing different types of 3D surfaces
      7m 11s
    2. Extruding surfaces to create features in a model
      8m 58s
    3. Creating surfaces with lofts
      7m 49s
    4. Using Revolve and Rail Revolve to create surfaces
      7m 42s
    5. Using Sweep Rail to create a 3D claw
      7m 49s
    6. Creating complex surface shapes using Network Surface
      8m 7s
  8. 46m 48s
    1. Introducing solids
      5m 42s
    2. Making solids with primitives
      5m 41s
    3. Extruding curves to create solids without primitives
      8m 59s
    4. Creating unique shapes with the union, difference, and intersection Boolean operators
      6m 46s
    5. Troubleshooting solids and Booleans
      8m 53s
    6. Editing with the solid edit tools
      6m 20s
    7. Creating and transforming holes in solids
      4m 27s
  9. 27m 8s
    1. Understanding Rhino's modeling aids
      3m 59s
    2. Working with the Grid Snap modeling aid
      2m 22s
    3. Using the Ortho modeling aid
      3m 4s
    4. Using the Planar modeling aid
      2m 4s
    5. Incorporating the Osnap modeling aid into your workflow
      6m 7s
    6. Understanding the Project and Smart Track modeling aids
      4m 42s
    7. Setting cursor constraints
      4m 50s
  10. 50m 14s
    1. Editing corners with Fillet and Chamfer
      7m 38s
    2. Trimming and splitting with curve Booleans
      5m 37s
    3. Moving and rotating objects with the Drag and Nudge tools
      7m 24s
    4. Copying and pasting objects
      4m 10s
    5. Understanding how Rhino uses Undo and Redo
      3m 42s
    6. Grouping objects
      3m 21s
    7. Scaling objects
      6m 40s
    8. Duplicating objects using the Mirror command
      6m 36s
    9. Making copies and structured sets using arrays
      5m 6s
  11. 20m 37s
    1. Using the Analysis toolbar to understand characteristics of a model
      6m 14s
    2. Defining degrees of curve and surfaces
      6m 6s
    3. Using Rebuild and Change Degree
      8m 17s
  12. 26m 21s
    1. Measuring and labeling values on a model using dimensioning
      5m 22s
    2. Creating screen captures for quick proofs
      5m 16s
    3. Creating 2D views of a 3D model
      6m 44s
    4. Rendering a project
      8m 59s
  13. 22m 5s
    1. Preparing a model for prototyping by confirming that all gaps are closed
      5m 17s
    2. Using the "shelling" technique to create wall thickness
      10m 54s
    3. Exporting to the STL format for 3D printing
      5m 54s
  14. 14s
    1. Goodbye
      14s

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Rhino 4 Essential Training
5h 48m Beginner Apr 08, 2010

Viewers: in countries Watching now:

In Rhino 4.0 Essential Training, author Dave Schultze shows how the 3D NURBS-based modeling tools in Rhino 4.0 are used to engineer products from toy robots to full-sized aircraft. This course concentrates on using Rhino 4.0 for industrial design and rapid prototyping, with a review of common 3D terminology using specific examples. Along with a comprehensive exploration of the Rhino interface, the course includes an introduction to building 3D objects with Rhino's three primary entities: the curve, the surface, and the solid. Exercise files are included with the course.

Topics include:
  • Understanding 3D terminology
  • Viewing a 3D model in Rhino 4.0
  • Manipulating objects with commands
  • Creating curves, surfaces, and solids
  • Applying transformations to 3D objects
  • Creating unique shapes with Boolean operators
  • Snapping to objects and planes
  • Defining curve and surface degree
  • Prototyping a 3D model
Subjects:
Architecture Modeling Product Design CAD 2D Drawing 3D Drawing
Software:
Rhino
Author:
Dave Schultze

Editing corners with Fillet and Chamfer

In this video, we will explore fillets and chamfers and how they can be used on literally every type of entity, from curves, to surfaces, to solids. If you are not familiar with the difference between the two, a fillet is a rounded or curved corner and a chamfer is a straight or angled corner, wherever two curves or edges meet. So, let's get started. We have got this head profile already prepped for an extrusion, but I am going to recommend that we fillet the curve first. This is a concept I call "prefilletize." So, we are going to go to the Curve menu before we extrude and fillet those corners to round them off.

Notice we have lots of options, but we will leave those alone for now. I will start picking a couple of the corners. I am going to highlight this fillet, so you can see that it has not been joined, and it's also not quite the size I like. So, I am going to hit Ctrl+Z to undo it and start over with a different number. Curve > Fillet Curves. This time after I change the Radius to 7, I am going to go ahead and put Join=Yes, so I won't have broken parts.

I am just going to click the two sides, and it now fillets them to the new radius and joins it together. So, it's a nice little trick. I am going to go ahead and right- click on the mouse to repeat and just continue all the way around. Click each side. So, that's prefilletize. Let's go ahead and extrude this into a three-dimensional shape using the Solid menu, so that we get caps on both ends. Solid > Extrude Planar Curve > Straight, select and hit the right-click to accept.

I am going to go ahead and type 30 to get it as a precise distance. So, now we have got something with fillets in one direction but not the other. So, let's go ahead and use the Solid Fillet now, because it is part of a solid entity, and fillet this edge. One thing to look out for is to make the second fillet smaller than the first, going the other direction. This fillet was 7, so that is our new maximum.

I am going to try doing a larger one, just to show you what happens. I type in 8, which is bigger that 7. Select the edge, right-click to accept, and let's see what happens. This is why you can't be larger that the radii you are going around. You get crazy geometry. I am going to hit Ctrl+Z to Undo. Repeat this command again. Solid > Fillet Edge > Fillet Edge, and now we are going to use a number that is smaller. I am going to try 3, definitely smaller than 7.

Select the edge, right-click twice to accept. So, this is guaranteed success every time. Do the first fillet with the curve, the second fillet smaller, and you should never have any problems. I am going to continue and fillet the back edge of the head. So, right-click to repeat, select, and then hit right-click or Enter. And it's pretty clean and tight. Let's explore chamfers.

We are going to make some adjustments to the body here. I would like to have chamfered corners there, so let's explore the Curve menu > Chamfer Curves. With Chamfer, we have two dimensions, so let's go ahead and make the front the same. I am going to change this from 1, 1 to 5, 5. Select Join=Yes, so we don't have to do that later, and then pick the two corners. I am going to try that on the other front.

If I select them, it's all one piece, because Join was set to Yes. Let's go ahead and try it on the back with two different numbers. Curve > Chamfer Curves. I am going to select the Distances now to change it. And it's helpful to remember first versus second, so I am going to go 5 first, 10 second. Why that's important is I want to make sure that the 5 dimension is along the side and the 10 is along the back, so I have to pick it in the exact same order that I entered it. So, 5, 10, and you can see the difference there.

It's very easy to pick them in the wrong order. So, I am going to right- click to repeat, 5 and 10 there. Let's go ahead and extrude this into 3D. I am going to zoom out a bit. Select, going back to the Solid menu and Extrude Planar Curve > Straight. Now we will use a Solid Chamfer option. This is a little bit buried. It's under the Solid Fillet, and there is the Chamfer option.

I am going to pick a new distance. Instead of 1, I am going to type in 2. Remember, 2 is smaller than the 5 here, and then we have 5 and 10 going the other direction in the back. So, you can pick the edges one by one. A lot of times I like to rotate the view and just draw a box around it. Right-click to accept. And there you have it. Let's talk about filling now with a surface. We have done curves and we have done solids and I also discussed the relationship between surfaces and solids and how it's actually a fluid state.

So, this copy of the head, which is about halfway done, is a solid, because it has got multiple surfaces joined together, so you would use one of the Solid commands on it. I am going to go ahead and convert it to a group of surfaces with a simple Explode command. So, now we have three separate pieces of geometry: the front, side, and back. Go ahead and delete the back. We don't need this for the test. We will do a Fillet along this edge but using the Surface menu.

Surface > Fillet two Surfaces. Radius is 3. So, I will change that. And then just pick the two surfaces that are in the vicinity. Note that the two surfaces were filleted but not yet joined. I am going to undo that. Note that we have the back open and the front. Just to show the relationship between surfaces that are unjoined versus joined, suddenly becoming solids, and you can use those commands. So, I am going to pick the front and top, use the opposite of Explode, which is Join.

They are now connected along that edge, so when I select the whole thing lights up. And let's try to do a solid. Even though the back is open, you have multiple surfaces joined together, so you have satisfied the definition of a solid. Solid > Fillet Edge > Fillet. It's currently set to 3, which we will go ahead and use. Right-click to accept. There you can see, the Solid command works on a group of surfaces joined, which are therefore polysurfaces, but it's not entirely closed. The Fillet and Chamfer tools are very easy to use, which is nice since you will likely be spending a lot of time using them.

Remember the two practice tips and things will go much easier. Number one, try to prefilletize, meaning make the fillets on your curves first. And number two, when filleting solids with corners, create the bigger fillets first and then the smaller fillets later, so they flow over the first ones.

Find answers to the most frequently asked questions about Rhino 4 Essential Training.


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Q: I'm noticing several differences between the options that author shows in the video and my copy of Rhino. For example, I can't select curves on the edge of a surface or turn on control point when vertically extruding a closed surface like an ellipse. Also, I do not get the Sweep option. I'm running on Mac OS X Snow Leopard.
A: This course was recorded on a Windows computer. As of February 2012, Rhino for Mac is still in beta, so it is not yet a full-fledged product. Wait until the full version comes out to see if these issues are resolved.
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