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## Curve from Equation inside datum graph?  2-Guest

## Curve from Equation inside datum graph?

Hi,

Does anyone know if it is possible to, inside of creating a datum graph, put a "curve from equation"?

When I go to datum graph, the option for datum "curves" and then "curve from equation" is not available.

I would like to create a "datum graph" with a "curve from equation" so that I could offset from a spline, based on an equation.

I have a part shaped with a spline curve. I would like to pre-stress it the way a beam would bend (using beam bending equations) so that when it is counter pre-stressed, it deflects in a way to form the spline perfectly, if that makes sense.

If there is a way to control curves inside of "datum graph" using equations in another way, that would work as well.

I hope this makes sense and thanks in advance!

2 REPLIES 2  21-Topaz II
(To:rentien)

Curve from equation is not available in the graph creation tool. Datum curves support 3D geometry, graphs are 2D only and the from equation curve tool is a 3D construct. It is not clear from your problem statement why you need a graph feature, so try a datum curve.

If your base (reference curve) curve is planar then it is pretty easily offset in sketch mode.

Create a datum curve from equation as a feature. You can use this curve to drive derivative geometry. If you have the base curve and just need to offset it in a plane then you can use the offset tool in sketcher. If it is a non planar base curve then you will need to make some construction geometry to offset it variably in space.

========================================
Involute Development, LLC
Consulting Engineers
Specialists in Creo Parametric  22-Sapphire I
(To:rentien)

I too would like more control IN the graph feature, for use downstream in features driven by the graph.  Why not use 2 curves by equations?  They don't HAVE to have a Z component, and can be planar.  I'm terrible at math, but I seem to remember maybe an alternative in the graph feature.  Perhaps using an Excel spreadsheet....  I'm not 100% sure. Announcements