Create a curve from series of theoretical points.

[[Ch...]]

How do I create a curve from theoretical points?   I feel like this should be possible, but I can't figure out how.  I have been doing too much management stuff and even have my own cmm programmer now; please tell me that I'm not losing my touch.   

 

[[Cl...]]

Just a thought. What if you open the curve strategy, click on segment - List. Here you can save the points.

I'm wondering if you can open the point list in Notepad and add the points?

[[Ma...]]

There are so many ways to alter curves.

I am lost at what you want to achieve - as Clarke stated - you can save points from curve, alter it in text editor and then load nominals into new curve.
You can rotate nominals, move them. You can even mirror curve - with and without help of model.

[[Cl...]]

Trying it in simulation now.

Edited April 30

[[Cl...]]

With existing curve. Click on the down arrow on the left. Scroll down to the last point. Right click, copy point.

Paste point. A dialog box will open with the XYZ, IJK values to edit. I just tried it and it worked.

[[Ch...]]

I don't think I'm being clear about the goal.  There is no existing curve.  The points are not in a straight line and can't be created with curve.  It's hard to tell in the picture, but the theoretical points are all in the same plane, while the original points are not.   I could make it using FreeForm, but I can't report radius's as they change along the compressor wheel profile.   

They are individual points taken along the edge of a compressor wheel.   Then I create theoretical points and use formulas to put all the points in the same plane.  

In a perfect world I could recall those theoretical points into a curve.  But it won't let me.  

 

[[Ma...]]

Until monday i can not try that, but you should be able to recall points into curve. Just don't use theoretical - use normal points with strategy, where formulas will be in nominals. This should let you recalculate curve.

Otherwise you would need SW for models and make that curve from model.

[[Cl...]]

Assuming you have the XYZ/IJK of each point? They can be entered individually into a curve feature. Or am I still not getting it?

 

Edited April 30

[[To...]]

Is this close to what you're looking for?

[[Ow...]]

It's been awhile since I've done it but, basically type your nominals into different columns of an excel document and then save the document as a (Tab Deliminated).txt file and then read that file into curve like Tom defined above.

In the 2D curve example illustration I've attached, first row is X, 2nd Y, 3rd row Z.

If it is a 3D curve, you'll need the Unom, Vnom,wnom's  vectors as well.(I,J,K).

Edited April 30

[[Ow...]]

I tried to edit my original post to include that you have to have nominals in a curve to recall points into it, it won't recall points to create nominals.

[[Ma...]]

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You can recalculate so nominals can be created. But i think it won't work on theoretical points - it has to be normal points. Recalculating without actuals will make nominal curve from nominals - with actuals will create nominal curve from actuals.

It works the same as recalling measured points from standard features.

[[Iv...]]

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 Did you ever find a solution for recalling theoretical points into a curve? As you said, it seems doable, but the software is not allowing it. Thanks

[[Iv...]]

I can't validate it at the moment, but hopefully I can test it out by the EOD.

I want to try recalling the non-theoretical points into a curve. Once recalled, delete those points and rename the theoretical points with the same name as the deleted points. I tested one point out, and it looks like the theoretical point still connects to the curve! I don't know if it will blow up as soon as you run the results 🤔

[[Iv...]]

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 So, I tested it out, and it works... sort of. The curve adopts the theoretical points after you delete the actual points, with the same name caveat, of course. But the actuals(XYZ) within the curve do not match the theoretical actual (XYZ). They are close in some cases, but then like 2mm plus off in others. So not sure where those numbers are being pulled from. 

My theoretical points are Symmetry Points, so maybe that is having an influence? 

[[Ma...]]

I use CAD/ Creating Features/ Freeform/ Curve and select the file option to import the points. That is if you have Freeform/ Curve as an option.

[[Ri...]]

Can't you convert the theocraticals to physicals then create a Curve?

I have created theoretical points based on alignments to ensure vectors are correct, then make them a physical point.

[[Iv...]]

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 Yes, but that would only create the nominal curve, correct? In this case, I already have the nominal curve, but I'm unable to get the actuals into the curve since they are theoretical, and CALYPSO will not allow it. 

Below is the concept that I'm producing. Creating the theoretical symmetry points based on the max/min coordinate points of multiple opposing curves. I'm then able to bring these into a curve feature using the delte method that I mentioned above (somewhat). Because I already have the nominal points from the symmetry points, and there are only 14 points, I created it by hand. If there were more points, I would've used the method you mentioned to create the nominal path. 

[[Iv...]]

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 I'm not sure if I'm following correctly? Yes, you can change theoretical points to actual points if there is a physical feature to contact. In my case (and Chad Watton's), there is no physical feature to contact. 

[[Ma...]]

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I was addressing Chad's question.

[[Ri...]]

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Why do you need to have a physical feature to create physical points from theoretical points? If the theoretical points are where you believe they should be and you convert to physical points, run the points and see what values you get.

Then try to use them in Curve.

[[Ma...]]

You can use Min and Max coordinate feature to obtain such thing from curve - then this is linked to nominal and actual, so this "3d point" can be used as actuals.

It's in construction close to min/max element