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Loft profile along helix?

Question asked by Justin Lamey on Jun 13, 2017
Latest reply on Jun 13, 2017 by Dennis Bacon

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I used a backwards approach for this just to get something to one of our machine shop guys to do some work, but I am looking for how to do this the correct way.

I want to loft a rectangle profile, and have it sweep along a helix path, and loft into the smaller rectangle. I managed this with the sheet metal loft feature. I tried using regular loft, and then I converted the helix to a 3d sketch, and used that profile as a guide curve. The issue was that the profile stayed constant in its orientation. Please help me on how to do this the proper way.

Thank you,

Justin

Dennis Bacon Jun 13, 2017 8:20 AM

Correct Answer

Justin,,, Take a look at this and see if it's what you are after. This is a loft with centerline being your helix.

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Part1.SLDPRT.zip398.1 KB

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Dennis Bacon Jun 13, 2017 8:20 AM

Justin,,, Take a look at this and see if it's what you are after. This is a loft with centerline being your helix.

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Part1_db.SLDPRT.zip452.5 KB

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Justin Lamey @ Dennis Bacon on Jun 13, 2017 10:45 AM

Yes, that is it, thank you very much!

Do you have or suggest any resources to brush up with all the options within loft? I thought the issue was going to be with my start and end constraints, but I didn't even know I could use the center line feature.

Thanks for the help.

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Dennis Bacon @ Justin Lamey on Jun 13, 2017 11:44 AM

After I replied earlier I began to think that maybe you didn't want the helix to actually be at the center of the profiles. It works just as well if you have the corners of the profiles at the ends of the helix. That way the body would match up identically to what you have with the sheet metal loft. I.E the centerline does not have to be in the center. I just did that from habit. Nice job the the sheet metal loft. I would do any of the included tutorials regarding lofts. They are pretty darn good. Also follow the forum to see the amazing stuff others are doing. YouTube tutorials are a great resource also.

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Dennis Bacon Jun 13, 2017 8:20 AM
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Correct Answer
Justin,,, Take a look at this and see if it's what you are after. This is a loft with centerline being your helix.
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- Part1_db.SLDPRT.zip452.5 KB
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- Justin Lamey @ Dennis Bacon on Jun 13, 2017 10:45 AM
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  Correct Answer
  Yes, that is it, thank you very much!
  
  Do you have or suggest any resources to brush up with all the options within loft? I thought the issue was going to be with my start and end constraints, but I didn't even know I could use the center line feature.
  
  Thanks for the help.
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  - Dennis Bacon @ Justin Lamey on Jun 13, 2017 11:44 AM
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    Correct Answer
    After I replied earlier I began to think that maybe you didn't want the helix to actually be at the center of the profiles. It works just as well if you have the corners of the profiles at the ends of the helix. That way the body would match up identically to what you have with the sheet metal loft. I.E the centerline does not have to be in the center. I just did that from habit. Nice job the the sheet metal loft. I would do any of the included tutorials regarding lofts. They are pretty darn good. Also follow the forum to see the amazing stuff others are doing. YouTube tutorials are a great resource also.
    Like • Show 1 Like1
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Loft profile along helix?

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