Loft: The selected rail does not touch all of the profiles

[Anonymous]

I tried to use the purple line in my design (picture 1 attached) to be my third guide rail, but I got the warning: the selected rail does not touch all of the profiles. I zoomed in and found that the rail was indeed not touching. However, it seemed to me that it wasn't properly aligned with the template body I used to project it onto.

Hopefully, someone can help.

Best,

Nate

[davebYYPCU]

Edit the profile sketch,

Project > Intersect that (and All) Rail/s into the sketch first thing. 

Hide all rails.  Draw the profile snapping to the purple dots the project command created.

This is the only workflow for never getting that error.  (Any thing else is just a fluke.)

Might help

[Anonymous]

Okay, so I projected all the curves and points that were going to be projected to surface. Then I intersected all those curves and points together. Then I projected to surface all those curves and points. The points all projected just fine along the selected face. The curves didn't, however: the tow ends and the middle point of the curve projected fine, but the other two (example of one of them in the screenshot) fell short of the selected face to be projected onto.

Any ideas how to get those two parts of the curve to project properly so that they line up with the selected face and the projected points?

[davebYYPCU]

I appreciate the File is attached but I am on walkabout until 29th, and your pic is not clear with this viewer.

if there is a curves to faces problem, then the faces or curves have some sort of misalignment.

Does Patch > Extrude, the profile sketch curves, through the face give a clean edge intersection?

You could make a temporary cutter body, to show why the projected curves have not behaved as expected.

See if @TrippyLighting or @jeff_strater can chime in with the file itself give more info.

[Anonymous]

Is there any way to forward the info for this case to those two?

[jeff_strater]

the model is attached here, that is good.  What I need is a screencast/video showing what profiles you are trying to loft and what you are selecting as rail curves.  Thanks

[Anonymous]

I couldn't figure out how to paste the screencast url or access it from my screencasts so I attached it as an mp4. Hope that's okay.

[jeff_strater]

@Anonymous, yes, that works fine for the video.  However, the version of the design you posted above does not seem to have sketch19 in it., and I can't find that sketch geometry anywhere in that version.  But, what you show there definitely looks wrong, and may be a bug in Fusion.  If you could share the most up-to-date version, I should be able to reproduce it and we can investigate further.

[Anonymous]

Here's the latest version

[jeff_strater]

thanks for the info.  I can reproduce the problem, we'll investigate.  The bug is FUS-6328

[chrisplyler]

Jeff, what is the lowest numbered FUS-XXXX bug you have on the list? What number did you start at? Are they sequential, or do the four digits represent some coding system?

[Anonymous]

I was clicking around, trying to loft, and I sort of mindlessly clicked one face to loft, then the rail (the one that has been the issue) and then the second face to loft, and, either because of this changed order, or maybe because of something you guys have been working on, well, it now works.

[jamesjanke]

I was having a similar issue and selecting the rail first then the profiles worked.

[TrippyLighting]

@Anonymous a few things I want to point out::

1. The curves in the first sketch are not tangent (G1) or curvature continuous (G2):

2. If that was not intended (it usually isn't) a single 5-degree curve with 6 points or a fitpoint spline with a maximum of 3 points is a better choice and will create a better surface. The top is the original, the bottom is the single curve. 

 

3. These 2 sketch projection tools 

When used in conjunction with splines create projection curves that often exhibit bad curvature (same with offset splines):

It isn't really bad in this case, but it is also completely avoidable in 90% of the cases. 

4. Mirroring a spline in a sketch does not always create an identical spline, particularly if that spline is edited after the mirroring operation. For this sort of design, it is also completely unnecessary.

5. Your comment n the screencast you shared that you need to project these points in order to be able to loft is also incorrect.

Work with surfaces!

Instead of extruding a solid, although that would work as well in this case, only a surface from sketch1.

Then in the surface tab use the spit face or trim command to create an intersection edge between the vertical surface and the curve in sketch2.

If you compare the curvature of that edge with the curvature of your projected sketch you'll find that the curvature of the edge is super smooth:

 

[alexmatthews3]

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