9 Replies Latest reply on Apr 28, 2013 1:35 AM by Waihoong Loke

Camaro Surface Filleting Problem

Waihoong Loke Apr 22, 2013 3:45 AM

Hi Guys, I'm recently having a play with the Camaro modelling which can be found on https://d2t1xqejof9utc.cloudfront.net/files/18211/2010_Camaro_Body_Tutorial.pdf?1360365195 and I encountered a problem.

I'm trying to do the step at the bottom of page 168 and it is about filleting the edges of lower grill surface openings.

The knit surface is done without problem.

I followed every steps in the tutorial but I failed to fillet the lower edge at 0.0625'' after filleting the upper edge with curve.

I also tried to do the lower edge first then the upper edge, it works but it is different from what I really want as shown in picture below.

It is realised that the main problem is at the intersection of the two edges.

I have attached my working file and your help is well appreciated.

Thanks,

Loke

Camaro47.SLDPRT.zip 3.9 MB

Re: Camaro Surface Filleting Problem

Matthew Perez Apr 22, 2013 8:57 AM (in response to Waihoong Loke)
Hey Waihoong, when fillets fail its usually for 2 reasons. Either the curvature of the edge you are trying to fillet, or some discontinuity in the edge/corner where the fillet ends. I think its the 2nd one in this case. In general when dealing with complex surfaces Fillets are a bad idea. Well fillets that we have access to. A fillet is a constant radius and SW doesnt have control over edge tangency so the fillets will really stand out when we deal with reflections/light. In reality what I would do here rather than fillet(even though i know i did that in my tutorial) is split the surfaces up and do some boundary surfaces and fillet surfaces to blend everything how i want. Since I am on 2013 i can't upload a SW file for you to see, but here is an IGES file. In this file I did a few split lines breaking up the edges I wanted to blend together. Then i used the Delete Face command to remove those faces. I start back with a boundary surface front the front edge then work my way up to doing a filled surface to blend in the corner. If you look at where the new surfaces are you should be able to see how i split up the original faces. I did leave your fillet for the upper edge there but i did split it back away from the edge a little so i could blend the inside edge. I think during the iges conversion a few of your faces failed but the ones we are talking about here came through okay.

Let me know if this makes sense.

Camaro47.zip 940.3 KB
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- Re: Camaro Surface Filleting Problem
  
  Waihoong Loke Apr 23, 2013 1:42 AM (in response to Matthew Perez)
  
  Hi Matthew,
  
  Thanks for your prompt reply.
  
  I understood what you mean but failed to do so in SW.
  
  I have offset the bottom edge of lower grill opening and used it to spilt the upper edge.
  
  Then when I try to fillet it, the fillet feature still propagate to the intersection of the two surfaces as you can see from image below.
  
  Could you show me how to do it step by step and it will benefit others that have the same problem like me as well.
  
  Thanks you Matthew.
  
  Regards,
  Loke
  
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  - Re: Camaro Surface Filleting Problem
    
    Matthew Perez Apr 23, 2013 7:22 AM (in response to Waihoong Loke)
    
    Loke, I didnt use fillets(except for the one you had which is also shown in the image you posted) for any of the edges. I used sketches to make the split lines on the surfaces and I used surfaces like Boundary and Filled to make the "fillet".
    
    If i get time this week i will try to make a video showing the process, but no promises. I have a lot on my plate:)
    
    matt
    
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    - Re: Camaro Surface Filleting Problem
      
      Matthew Perez Apr 23, 2013 7:45 AM (in response to Matthew Perez)
      
      Okay so I squeezed it in so I didnt forget. I didnt record audio since the family is sleeping but hopefully you can follow along. Basically I used sketches from the FRONT and TOP to create Split Lines and delete faces. I could have also used offset surfaces and extended them out. Looking back the internal edge of the opening should probably be larger but the process is the same. You will see when i tried to use filled surface i was getting a wrinkle in the surface. When this happens its because some geometry is driving it too much. In that case i just split and deleted more of the face(it doesnt matter if you have square corners for a filled surface) and let the geometry work itself out.
      
      let me know if you have questions.
      
      SWForumHelpCamaroFillet.zip 15.5 MB
      
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      - Re: Camaro Surface Filleting Problem
        
        Waihoong Loke Apr 23, 2013 11:46 AM (in response to Matthew Perez)
        
        Hi Matthew,
        
        Really appreciate and thank you for your video,it is really useful!
        
        I understood all of the steps but when I come to last step of filleting the surface, bumps appeared on my fillet surface and I couldn't find out why.
        
        Cheers,
        Loke
        
        Camaro49.rar.zip 4.1 MB
        
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        Re: Camaro Surface Filleting Problem
        
        Matthew Perez Apr 24, 2013 9:56 AM (in response to Waihoong Loke)
        
        Did you use Tangent or curvature relations when making all the other boundary surfaces? If not, when you go to do the filled surface then you will have issues.
        
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        Re: Camaro Surface Filleting Problem
        
        Waihoong Loke Apr 25, 2013 5:29 AM (in response to Matthew Perez)
        
        Yes, i did follow every step in the tutorial. Can you please check the problem for me?
        
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        Re: Camaro Surface Filleting Problem
        
        Matthew Perez Apr 25, 2013 9:58 AM (in response to Waihoong Loke)
        
        sorry i dont have anything to unpack a .rar file. if you just zip the part file ill try and take a look at it but i have a lot of work on my plate at the moment.
        
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        Re: Camaro Surface Filleting Problem
        
        Waihoong Loke Apr 28, 2013 1:35 AM (in response to Matthew Perez)
        
        Hi Matthew,
        
        Thanks for helping me.
        
        I have attached the Camaro49 zip file, feel free to take your time.
        
        Cheers,
        Loke
        
        28/4/2013
        
        After a play the edge settings, I found the most satisfying configuration is by making all edges in Tangent but leave one edge in Contact, and this eliminates all the uneven surface by making all edges in Tangent.
        
        I have attached this sldprt file in Camaro50, is that ok if I construct the model in this way?
        
        Message was edited by: Waihoong Loke
        
        Camaro50.SLDPRT.zip 4.1 MB
        
        Camaro49.SLDPRT.zip 4.1 MB
        
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