Utilizing math functions [f(x)] to generate sketch geometry.

[kkoenig]

We have parts with complex shapes which can only be defined by generating a curve based on a mathematical equation. For example: sine wave, parabola, hyperbola, etc. How can we command inventor to generate a sketched shape such as this?

[Ed Jobe]

I don't have IV anymore, so I can't give you specific help on the newer versions. However, I have a lisp routine that will generate a parabola. IOW, you can run the function in acad, generate a polyline, and then import that into IV and loft it, sweep it, etc.

[kkoenig]

Thanks for the quick reply Ed. If you wouldn't mind sending me that lisp file I'll give it a try. At least it will give a place to start.
I'm new to this whole forum thing. Can you get my e-mail from my profile?

[Digital Prototype of DOOM]

From what I gather you have to draw the geometry and then apply equations to drive dimensions you'd put in.


Take for example a parabola...

Draw a spline with 3 points. Dimension between the 3 points in a matter that permits the lateral distance to be equal from each endpoint to the centerpoint, and then apply your height dimension...

Like this...

[Ed Jobe]

In case you still want the lisp.

[jonathan.landeros]

Another suggestion, use Excel to generate the points, and import the points into Inventor. You should be able to put a spline through that and get your curve.

Don't know if that absolutely solves your issue, but it's at least another option.