View Full Version : equation for a spline

bcooper

08-10-2010, 09:26 PM

We use points to drive a curve to create an impeller vane. I know ProEngineer uses an equation to create the curve based on the point data. Does anyone know how to capture or view that equation?

Thanks in advance for your help

barnlogic

08-11-2010, 10:46 PM

You are posting in the routed systems forum, I doubt anyone will help on this topic as it is more of a modeling problem.

Actually I would suggest posting it in the Toolkit (software development) forum as well since I would probably use Toolkit to get at that data.

c_thompson_68

08-12-2010, 03:02 PM

Pro-E allows the creation

of a curve from equations. I do not think Pro-E can directly extract the

information from a curve created through points, although it maybe

possible using MathCAD with Pro-E. The length of a curve can certainly

be measured and assigned to a variable (

http://www.appianwaytech.com/blog/2010/03/06/tips-and-tricks (http://www.linkedin.com/redirect?url=http%3A%2F%2Fwww%2Eappianwaytech%2Eco m%2Fblog%2F2010%2F03%2F06%2Ftips-and-tricks%2F130&urlhash=zMzp) /130

) used to drive an relation (equation).

If you do not have MathCAD, what I would suggest trying is to export the

point data and import the point data into MS Excel. Use a trendline

(polynomial, power, exponential, etc.) to extract the equation of a

curve from the point data. Next, recreate the curve in Pro-E using the

curve from equation tool.

bcooper

08-12-2010, 04:39 PM

Thanks C_thompson, I'll try that.I never gave a thought to using excell. The point data is origonally created in excell so all the information is already there.

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