Continuous Curves for Patch Loft

Continuous Curves for Patch Loft

Anonymous
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Continuous Curves for Patch Loft

Anonymous
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Hello there!

I have a question regarding continuous sketch lines/splines for the use as profiles for the loft command in the Patch workspace:

 

I have created several curves in sketches to be used as profiles for a loft command. These curves were made by projecting a straight line onto an existing body (Screenshot 01, Body1), then breaking the link on these projection lines, to get independent sketch entities.

Screenshot 1.jpg

 

The end goal is to match the edges of the patch created by the loft EXACTLY with the body surface. I want to use the patch (which is to be thickened later on of course) to cut away a piece from the above mentioned complex Body1, since it is too big in places.

 

In this instance I want to create a loft between the curves A and B (Screenshot 02).

Screenshot 2.jpg

 

When I select the loft command though and try to add the curves as profiles, I notice, that curve A is not recognized as a single curve and therefore I am unable to execute the command. (Screenshot 03 - 06)

Screenshot 3.jpg

 

Screenshot 4.jpg

 

Screenshot 5.jpg

 

Screenshot 6.jpg

 

Click-holding over the point, which seems to be the break in the chain, reveals two sketch points and two sketch curves as well as a coincident constraint to connect the two.

 

I already tried to add a tangent constraint but that does not work (Screenshot 07).

 

Screenshot 7.jpg

 

Does anybody have a clue how to resolve this? After all this seems like one of the perfect uses for the projection functionality, right? Creating a curve that exactly follows the surface of a complex body so you don’t have to painstakingly draw it out yourself and failing by fractions of millimeters…

 

Thanks in advance for any help!

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laughingcreek
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What setting did you use for the surface projection?

 

I doubt you are going to be able to get satisfactory lofting results, even if you do manage to get the lines to work (for a number of reasons, but primarily because the original surface wasn't a loft surface, so your never going to match it with a continuous loft surface.)  Maybe if you illustrate what you are tying to do, and attach your model, someone can suggest an alternative work flow.

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