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Inventor 2014 Essential Training
Illustration by Richard Downs

Projecting geometry


From:

Inventor 2014 Essential Training

with John Helfen

Video: Projecting geometry

In the previous movie on creating work planes, work axis, Within a sketch, projecting geometry can be incredibly helpful. I'm going to start by creating a 2D sketch by clicking Create What you'll notice is that it did not project these edges that are on an angle.
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  1. 1m 24s
    1. Welcome
      47s
    2. Using the exercise files
      37s
  2. 6m 20s
    1. Exploring major workflow steps
      2m 19s
    2. Reviewing different file types
      4m 1s
  3. 22m 3s
    1. Navigating using the ViewCube
      4m 56s
    2. Navigating using the navigation tools
      5m 31s
    3. Using the browser
      3m 34s
    4. Using the ribbon bar
      2m 47s
    5. Using the Quick Access Toolbar
      42s
    6. Using the Marking menu
      4m 33s
  4. 22m 6s
    1. Basic menu customization
      6m 40s
    2. Custom ribbon bar panels
      6m 22s
    3. Keyboard
      5m 9s
    4. Marking menu customization
      3m 55s
  5. 20m 24s
    1. Project file introduction
      3m 54s
    2. The project file: .ipj
      4m 4s
    3. Setting up the project file for this course
      7m 11s
    4. Frequently used subfolders
      5m 15s
  6. 22m 31s
    1. Introducing sketching
      4m 55s
    2. Working with origin geometry
      4m 46s
    3. Understanding constraints
      7m 39s
    4. Application options
      5m 11s
  7. 50m 43s
    1. Drawing lines
      6m 29s
    2. Creating rectangles and arcs
      9m 26s
    3. Creating splines
      6m 35s
    4. Creating slots
      5m 43s
    5. Construction geometry
      6m 18s
    6. Dimensioning
      9m 34s
    7. Parameters
      6m 38s
  8. 30m 33s
    1. Move, copy, and rotate sketch geometry
      7m 43s
    2. Trim, extend, and split sketch geometry
      6m 20s
    3. Scale, stretch, and offset geometry
      7m 47s
    4. Creating rectangular, circular, and mirrored sketch patterns
      8m 43s
  9. 19m 27s
    1. Understanding work features
      3m 58s
    2. Creating offset work planes
      4m 17s
    3. Creating work planes
      6m 59s
    4. Creating work axes and points
      4m 13s
  10. 16m 50s
    1. Projecting geometry
      7m 7s
    2. Importing AutoCAD data
      9m 43s
  11. 54m 31s
    1. Part feature introduction
      5m 14s
    2. Creating a base extrusion feature
      8m 46s
    3. Keeping extrusions connected with the To next face/body option
      4m 29s
    4. Creating revolves
      7m 42s
    5. Creating complex shapes with the Loft tool
      8m 50s
    6. Adding control to a loft by creating rails
      8m 40s
    7. Creating a sweep feature
      6m 16s
    8. Creating a sweep feature with model edges
      4m 34s
  12. 24m 44s
    1. Adding holes to a part model
      10m 10s
    2. Modifying edges with fillets and chamfers
      4m 18s
    3. Hollowing parts with the shell feature
      10m 16s
  13. 25m 37s
    1. Creating rectangular feature patterns
      9m 23s
    2. Adding intelligence to a rectangular pattern
      5m 45s
    3. Creating rectangular feature patterns along a path
      2m 22s
    4. Creating circular feature patterns
      3m 11s
    5. Mirroring part features
      4m 56s
  14. 31m 30s
    1. Understanding iParts and iFeatures
      3m 19s
    2. Creating an iPart from an existing part
      11m 0s
    3. Changing between versions inside an iPart
      5m 50s
    4. Extracting iFeatures for use in other parts
      5m 11s
    5. Inserting iFeatures into a part
      6m 10s
  15. 26m 23s
    1. Introduction to assemblies NEW
      1m 59s
    2. Placing components NEW
      7m 40s
    3. Creating components in the context of an assembly NEW
      8m 9s
    4. Placing fasteners from the Content Center NEW
      8m 35s
  16. 46m 14s
    1. The Mate/Flush constraint NEW
      9m 42s
    2. The Angle constraint NEW
      5m 34s
    3. The Insert constraint NEW
      3m 55s
    4. Driving constraints NEW
      10m 0s
    5. The Transitional tab NEW
      3m 50s
    6. The Motion tab NEW
      9m 18s
    7. Contact sets NEW
      3m 55s
  17. 18m 38s
    1. Adding materials to parts in an assembly NEW
      4m 3s
    2. Visual styles NEW
      4m 52s
    3. Enhancing the design experience with shadows NEW
      2m 9s
    4. Adding a ground plane, reflections, and perspective to a design NEW
      3m 34s
    5. Changing the lighting style to match a design NEW
      4m 0s
  18. 39m 11s
    1. Exploring initial drawing creation NEW
      5m 6s
    2. Placing base and projected views NEW
      9m 31s
    3. Creating section views NEW
      8m 0s
    4. Creating detail views NEW
      3m 56s
    5. Creating a breakout view NEW
      5m 41s
    6. Creating auxiliary and cropped views NEW
      6m 57s
  19. 25m 57s
    1. Creating general dimensions NEW
      9m 20s
    2. Changing dimension precision NEW
      4m 21s
    3. Creating baseline, ordinate, and chain dimensions NEW
      5m 51s
    4. Creating baseline, ordinate, and chain dimension sets NEW
      6m 25s
  20. 10m 43s
    1. Creating individual balloons NEW
      4m 34s
    2. Creating a group of balloons with automatic ballooning NEW
      3m 40s
    3. Adding a parts list to the drawing NEW
      2m 29s
  21. 30s
    1. Next steps
      30s

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Inventor 2014 Essential Training
8h 36m Beginner Apr 17, 2014 Updated May 19, 2014

Viewers: in countries Watching now:

Already up and running? This course is the next step in building your Autodesk Inventor skillset. Author John Helfen takes you through the interface and key processes of this parametric design system, including sketching, part modeling, assemblies, and drawings. Each process works in conjunction with the rest, allowing you to create parts and assemblies and document them in a way that they can be manufactured. Learn how to set up your project file; create and modify geometry; create extrusions, sweeps, and lofts; build parts with placed features and patterns of features; and create iParts and iFeatures. John also covers assembly visualization techniques, drawing views, and balloons and parts lists.

The course was created and produced by John Helfen. We're honored to host this training in our library.

Topics include:
  • Customizing Inventor's menus
  • Drawing rectangles, arcs, splines, and slots
  • Moving, copying, and rotating geometry
  • Trimming, splitting, scaling, and stretching geometry
  • Creating work planes
  • Projecting and importing geometry
  • Creating extrusions, revolves, sweeps, and lofts
  • Adding holes to a part model
  • Creating rectangular feature patterns
  • Creating iParts and iFeatures
  • Using constraints to position parts
  • Creating drawing views
  • Setting dimensions
Subjects:
Prototyping Product Design CAD 3D Drawing
Software:
Inventor
Author:
John Helfen

Projecting geometry

In the previous movie on creating work planes, work axis, and work points, we used a part very similar to this. The one difference is that we had an angled cut that started at this intersection and ran across the face of this part. We're going to work through creating that cut in order to talk a little bit about projecting geometry. Within a sketch, projecting geometry can be incredibly helpful. As a matter of fact, Inventor Bug does it by default, right out of the box. I'm going to start by creating a 2D sketch by clicking Create 2D sketch from the toolbar, and I'm going to select this top face.

Inventor rotates us into a normal view. And you can see that it's projected some edges automatically, as I mentioned. It's projected all the edges that are touching this sketch plain by default. You can turn this option off, but I find it very useful, and I find that most people leave it on. What you'll notice is that it did not project these edges that are on an angle. And that's what we're going to do here. In order to create this angled slice, we could go back to our top view, right click and select Create Line, and we could begin drawing the shape we want to cut.

We could start at the intersection point; we could draw a line over here. We could draw a line down to the bottom pulling it and connect it back to its start point. Now, what you'll find is if we zoom in here, that's not very accurate. You can see that this line doesn't match up with this line exactly, and we could go through adding constraints to make these colinear. I could, for example, dimension this line, but in order to place this dimension, I need to actually go and measure the distance between these two lines. But there's a much easier way to do it with projected geometry.

I'm going to right-click and Undo several times to back out and get back to prior to creating those lines. This time, instead of going into the Line tool, I'm going to use the Projected Geometry functionality. Which is found in the Sketch tab under the Draw panel. And what it allows me to do is select individual pieces of geometry that I can project to this sketch and use to create my shape. I could select individual lines or if I cancel out of that and Undo, I can also select Project Geometry and select the entire face.

What that's done is just taken all the edges around that face and projected them, so that if I look at it from a top view, they line up perfectly with the lines and geometry below. Now, if I right-click and select the Line command, I can be very accurate about the fact that I know that this line is directly from the line below it. And when I left-click to place that geometry, I know that the end point is exactly on that line. The next thing I can do is right click and select General Dimension.

To define the exact angle at which that line resides. I'm going to select 40 on my keyboard and click the green checkbox, and you can see now that the line is purple indicating that it's fully constrained, and I can always come back to this and change this angle. If I finish this sketch, we rotate back to an isometric. And I can now right-click in the graphics window, select Extrude, and I have the ability to extrude this feature. I'm going to change the termination to through all, and instead of joining the material, I'll cut material.

And you can now see if we select the green checkbar, that we have an extrusion in the browser, the sketch we created is consumed, and we can always go back and edit that by double clicking it. I can, for example, change this to 30, hit enter, or click the green checkbox, and when I finish that sketch, the model will be updated to reflect that change. That explains how to project a geometry by default. The other option I want to look at is projecting cut edges. This is another one you'll use from time to time that can come in quite handy.

In order to show this, I need to create a new work plane. And I'm going to make on that is parallel to this plane. And it runs through the midpoint of this line. What I've essentially done is generated a work plane that cuts right through the middle of this part. And we're going to go ahead and begin by selecting that work plane and creating a new sketch on it. What you'll see is that I'm rotated into the view so that I'm looking normal on the sketch, but I have all this geometry in my way. If you look here, you can see all this geometry out in front of the work plane is blocking the view that I need to create this sketch.

What I can do is I can right click in the graphics window and find Slice Graphics. It's also F7 on your keyboard. And, when I toggle this, you'll see that all the geometry is removed and remember, F7 on your keyboard is the toggle for this. So, if I press F7 on my keyboard, the material comes back. It's simply a toggle, so that you can quickly slice away graphics and see what you're working on. The other thing that's important here, and what I really want to show, is how to project these cut edges. Because this sketch was created, and it didn't touch any other edges, like these outer edges; nothing was projected to the sketch.

But again, projecting those cut edges would be very helpful in controlling some of the geometry I'm going to create. So I'm going to use the drop down menu under Project Geometry, and I'm going to select Cut Edges. And when I do that, you can see Inventor automatically runs around the edge of the part and finds the lines that intersect this work plane and projects them to the sketch. And the reason I do that is I can now create a new line. And I can use these reference edges to, for example, draw a line from the midpoint of this line that's perpendicular to the line on the top.

You can see by doing that, I'm using those very specific points that I selected, the midpoint here and the perpendicularity, which was automatically added by Inventor when I got this line to a perpendicular point. And I now have those two points controlling this entire sketch. If I finish the sketch, you can see that my geometry comes back, and I do have a sketch that's ready to be used in a 3D modeling action. If I right click and select Extrude, I can select these profiles through the part.

And I have the ability to now make, for example, a slot in this part. Rather than extrude in one direction, I'm going to extrude in a symmetric fashion. And instead of joining material, I'm going to cut material. Now I can use my Heads-up display to adjust the length of this extrusion. And you can see I've created a slot directly on the midplane of what used to be this long line here. And it's not important that you understand how I did this. We'll cover this when we get into creating features.

You can see here that I can create work geometry that cuts through a part and then use Project Geometry to get very specific reference lines that I can use to create more advanced features.

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