Funky Curves on a Drum Hoop

Discussion created by Kevin Brown on Aug 27, 2019
Latest reply on Aug 29, 2019 by Paul Salvador

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I'm trying to recreate a snare drum hoop. This seemed like a quick project for me, but is turning out to really confuse me.

Note - this is only for visual reference and renderings - I'm not trying to produce these.

What I have attached is what I've come up with so far - this shows the basic hoop, with one "ear". I'm not really stoked about the geometry of the ear, but visually it's OK. I can not figure out how to pattern this around the hoop- it keeps giving an error. I'm wondering if I've done something fundamentally wrong with the way I went about it, and if that's why I cannot pattern.

Any ideas on a better / more accurate way to design this? I believe these hoops are pressed in one or two steps from sheet metal - I'm not sure if a custom forming tool could work here, I haven't really used them in SW before.

Thanks! SW2018 SP5

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drum hoop.SLDPRT.zip304.3 KB

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14 Replies

Paul Salvador Aug 28, 2019 12:49 AM
Hello Kevin,.. do this with surfaces, add the radii and thicken..
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- Kevin Brown @ Paul Salvador on Aug 28, 2019 8:04 AM
  Thanks for this - Surfaces is another aspect of SW that I haven't had a chance to really explore yet.. but this solution looks like what I'm after. I'll mess around with surfaces and see if I can produce the same result. Thanks!
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  - Paul Salvador @ Kevin Brown on Aug 28, 2019 3:26 PM
    Hello Kevin,.. yes, it is different but for this application, the way to go about it.., honestly, the corner should be trimmed/cut away to add a Fill or a Boundary Surface would blend close to the forming deformation.... (image)
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    drum hoop z b.zip389.2 KB
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    - Kevin Brown @ Paul Salvador on Aug 28, 2019 1:00 PM
      This looks exactly what I'm looking for - but a lot of these features I've never used. Any chance you could share the sldprt? I'd like to reverse what you've done so I can understand it better.
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      - Paul Salvador @ Kevin Brown on Aug 28, 2019 3:27 PM
        ..sure, I attached it above and simplified the early ring/cuts before adding the blends.
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        Kevin Brown @ Paul Salvador on Aug 29, 2019 11:24 AM
        Just wanted to follow up on this. I learned a lot just from messing around with this model - so thank you. I ended up cutting the surface, and then doing a circular pattern on the surface body and knit/merging - since I couldn't pattern the boundary - then thicken.. I still need to study the surface boundary and fill features, but this got me what I needed for now. I'm a bit afraid to go down the surfaces rabbit hole My company has a subscription to solid professor - so I believe there is lots of content there on surfaces I can go through.
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        drum hoop z b-kb.SLDPRT.zip1.8 MB
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        Paul Salvador @ Kevin Brown on Aug 29, 2019 12:13 PM
        Kevin, glad you are utilizing the features... btw, looking at your features,.. and what Maha said earlier about Mirroring the Boundary Surface,.. I see you keeped the two surfaces (fill/boundary).. so, as Maha suggested, choose one, and mirror... also (as another option), you can thicken the 1/10 trim and pattern.. then Combine (instead of knit 10 and thicken). (image)
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    - Maha Nadarasa @ Paul Salvador on Aug 28, 2019 7:45 PM
      Instead of mirroring this portion to other side. Why did you create a new portion to other side?
      
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      - Paul Salvador @ Maha Nadarasa on Aug 28, 2019 9:10 PM
        Maha, because I'm showing two surface blend examples, Boundary and Fill.
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        Maha Nadarasa @ Paul Salvador on Aug 28, 2019 9:12 PM
        Thanks
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Maha Nadarasa Aug 28, 2019 12:56 AM
You have to add fillet.
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- drum hoop-2018v.SLDPRT.zip234.3 KB
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- Kevin Brown @ Maha Nadarasa on Aug 28, 2019 8:06 AM
  Thank you! This looks great. I have not used the boundary feature before. I appreciate you including the model. I'll look through your feature tree and see if I can learn something from this. I appreciate it.
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Maha Nadarasa Aug 28, 2019 9:17 AM
Method 2
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- drum hoopM2-2018v.SLDPRT.zip169.2 KB
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- Kevin Brown @ Maha Nadarasa on Aug 28, 2019 11:06 AM
  Thanks for these - it's always good to look at how others make something, I learn a lot from that. I'm not able to circular pattern either of these features, with the boundary or with the loft.
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Funky Curves on a Drum Hoop

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