when we draw any compound curve such as two or three circle
that are tangency coincident we obtain any curve,

i wanna learn that new compund curve formulas;

my first message in this forums so may be i cant explain exactly but if any body help me i will be soo happppy,

i wanna learn that new compund curve formulas;

my first message in this forums so may be i cant explain exactly but if any body help me i will be soo happppy,

12FirstPreviousOnce those points are found you can easily import them to solidworks via a design table creating points then use Spline to connect them.

It is not exact but the standard deviation is minimal depending on how accurate you need the curve to be. It is lots of work to do especially if your curve doesn't need to be exact.

Im sure someone else can provide easier alternatives.

i will wait another ideas,

and that compound curve is continuous curve (not discontinuous)

canuse one formula to describe a spline that approximates those arcs. After forming your arcs, try going over it with a spline that is close to the same shape. After that, extract the XY coordinates of the spline's control points. You might be able to find or write a macro that does this automatically. Using the coordinates of the control points and the TREND() function in Excel (or whatever other software you have available) you can calculate a regression for those known coordinates. If you use Excel, you will have to fit to a function of the formy = m1*x1 + m2*x2 + ... + b, where m1, m2, m3 correspond to x, x^2, x^3 as used in a spline's polynomial equation.I'm not sure if this is of any help to you, but SW has a function called a "Fit Spline" that fits a single spline to a any geometry that you choose. You can control the accuracy of the fit spline. It's in Tools/Spline Tools.

but i cant send any file;

can anybody help me to send a file to explain what i want;

You have to zip the file before you can attach it. The process to attach a file is tedious. It seems like you have to click a number of buttons to get it done. As I recall, you have to upload the file and then you have to attach it.

In Pro-E, datum points from excel can be imported, than a curve can be routed through these points in the X, Y, and Z directions. I assume SolidWorks can do this as well, but I have not tested it. Perhaps the 3D Curve allows the creation of a spline through 3D datum points.

thanks for everything to everyone

sorry may be this isnt related our question but i have to learn to give more clue in our question and answer

2. In the Attach File(s) window that comes up, click the Choose button and select the file you want to upload (zip, png, jpg).

3. Click Upload File.

4. Now select that file in the file listing and click the green Attach File link.

Chris,

You're referring to "TrajPar" (Trajectory Parameters?)

Yes I have asked and I have complained and I have touted the fact that Pro/E had this capability from Day-One, so what's the problem?

Got Me!!!

thanks for interest

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thanks for interest

i will be soo happy thanks

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By the way, what is your avatar? It looks like some Persian flag.