My loft is twisted incorrectly around each construct plane

[simon.dyer]

In these pictures you will see my problem easily - the loft through each rib is not aligning up with the points in the sketches.  You can see the sketches are correct when I overlay them - both have 30 points defining the curve starting from the rear, however the loft seems to select diferent points or even creates them magically.
I can move these points manually, but that is long and tedious and inaccurate.  The sketch points are correct and need to be used by the lofter.  See the leading edge this is not right - all twisted around.

Solutions anyone please? 

[simon.dyer]

I've taken another look at your file.dyerrib.f3d  Strangely if I close the open sketch at the rear using a polyline, it correctly forms the shape. But your example in that file, tracing it, is another method.

But please also look at this 'tutorial video': https://screencast.autodesk.com/Embed/Timeline/c1d0d5f5-17a4-485b-86dc-5330e0cba236

Do you see how he imported the csv and it is immediately a closed sketch, with smooth spline leading edge, and sharp tail, even has undercamber with single TE point.

In checking his data, this TE point is both the start and end. Same as mine.

So I don't understand how he does that import in one step directly to the correct shape.

[simon.dyer]

@davebYYPCU If you like to try using my data I'll attach the troublesome tip sketch here as csv, but I'd really prefer not to trace it.  Its a complex wing shape, and I want to do more of these.

[davebYYPCU]

I have the tip rib, it converted and loaded fine,

This with the other pinched rib named root rib, work as in the picture.  No mapping edges, 

You now need correct root rib, rails to shape the spar and leading edge, trailing edge, hinge spars.

Nothing wrong with the script to import "Splines", you started out with hundreds of point mapping dots, 

Yes that root rib needed a line to close the profile, but not a spline in that case.

we close?

[simon.dyer]

Yes that is looking good. Can you zoom in on the TE of the tip rib? Cant see in the image.

When I load the file above tip.csv, the TE is not right. It looks like this.  Does yours look like that after loading in via script?

Can you zoom in after loading it like I did with this image:

[davebYYPCU]

It's the same rib here, will let you show me the profile you are after.

and it gives trouble with the loft, if it isn't changed

I presume there will be some intermediate ribs, to help with the transitions, but the loft has not adhered to the profile in in the top trailing edge region at the tip, I have seen this before, 

I would wait until a few more profiles are added see if it gets sorted.

[simon.dyer]

@davebYYPCUAdding in more ribs did not repair this import problem.  Did you notice in your image how the shaded region of the sketch does not follow the spline edge.  Perhaps Autodesk @jeff_strater can comment on that.

So two questions :
1. Why doesn't the shaded region (that will be extruded/lofted) follow the lines?
2. How can I relax the splines of the Trailing edge ( the pointy end ) so they come to a point like done in the screencast below.

Please see these examples @jeff_strater

The leading edge needs to be polyline smooth, and the trailing edge should come to a point.

I really want to understand how he got it to work in this screencast. https://screencast.autodesk.com/Embed/Timeline/c1d0d5f5-17a4-485b-86dc-5330e0cba236

His imported rib with undercamber:

My imported rib with undercamber:

[davebYYPCU]

1. Don't know.  I can't see anything in the data point files.

2. The data points in his file are logical to Fusion to get the straight termination.

 Your tip file has a 90 degree termination, Fusion has got that right, the import is not causing it, remove the second or second last fit point in the tip.csv file, and run again, 

Shaded profile not matching the sketch may not be from the import script, but it is present in both your demo ribs here so could be?

I have found the top and bottom Spline works for me.

[davebYYPCU]

I was just trying to create a demo with the tip rib, now I think there are problems are coming from the script.

I wanted to create a copy sketch, project limited spline points, to the new sketch.

Clicked on the tip rib shaded area to create a sketch, 

projected my points into the new sketch.

Turned off source sketch of the projections, and my copy sketch is empty.

Highlight my copy sketch in the browser and the points appear with the original spline

I think there is problems in the sketch imported from csv.  Holding both of us back.

Scast has the new sketch on the imported sketch plane,  

and the last sketch was placed on a Coinstruction plane, near the suspect sketch.  Points projected to this sketch also not visible when source sketch is hidden, 

will need some serious digging @jeff_strater 

[jeff_strater]

Thank you so much for bringing this to my intention.  This is an interesting bug.  If you add a line to those sketches, the points show up.  There is something I do need to dig into.

Jeff

[jeff_strater]

I think that this is a model size problem, combined with a "sketch with only points" problem.  Because the model is so large, the points in that sketch are kind of clipped off by the front/back clipping planes if the sketch contains only points.

It's still a bug, but I understand better what is causing it.  For now, once you add geometry to those sketches, they will appear.  We will investigate the bug.

Jeff

[davebYYPCU]

@jeff_strater Thanks for the explanation, yes I can add the chord line to make it work for now.  

We still don't have a guide or explanation for profile adherence to the sketch, and this is not my first post on that one.  Last time was thought to be graphic related, but this time it is seen in the Section analysis, too. When I get up to date will start a new thread for it.

@simon.dyer Were you aware that the file/s are using centimetres as unit for the script, I found it when making the construction plane, so we are working on 13m half span not 1300mm, give or take.  You did mention it will be 3m span. Use the spread sheet to divide all the data points by 10.