from Civil to Inventor

The Autodesk enthusiast exile

Inventor – Loft Angle and Weight

Lofting….I don’t know about you, but this has been one of the things I learned to hate.  Maybe because the application seems to have more control that I do during the process, or because I had some bad experiences with 3DS 10 years ago (pre MAX).  Whatever the reason, I just never liked Lofts very much.

Lofting is an extremely useful tool.  While you can reproduce the model by other means, the pain involved would be extensive.  The Loft Feature has so much control over the process, by weighted interpolation, there is no reason not to use it.  The trick is to control the interpolation to accomplish your goal.

Today, we’ll use Angles and Weights to create a transition between 2 other features, that would normally take a bit more time and planning to complete.

In the image below, you should see the part I needed to tie into another loft feature, with a specific angle at the transition.

image

While a Sweep around an extruded Feature might normally get a similar job done as easily, you would need more than 1 rail, adding complexity to process.  The Right side view (below) shows the problem with fillets and sweeps.  The rear edge is offset farther than the front, and the upper edge is not a typical fillet This is a perfect candidate for a Loft.

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March 16, 2009 Posted by | 2009, 3D Features | , , , , , , , , | 2 Comments

Civil 3D – Selective Design Criteria

Civil3D.com has added another write up of mine, check it out.

Selective Design Criteria on Civil3d.com

It may get some flak, so be sure to read the bashing.

December 2, 2008 Posted by | Alignments, Profiles | , , , , , | Leave a comment