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  • Problem with 'sweep'

    Discussion in 'SolidWorks' started by tsifko, Feb 12, 2014.

    1. tsifko

      tsifko New Member

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      [FONT=&quot]I'm a beginner in the use of solidworks.[/FONT]
      [FONT=&quot]I have to make an elbow which will have a varying diameter.[/FONT]
      [FONT=&quot]Let’s say that I have a 180° elbow, I want in its first 2/3 the diameter to be increased (like a horn) and in the rest 1/3 to stay stable.[/FONT]

      [FONT=&quot]I use solidworks to achieve this. So far, I insert a drawing from autocad to solidworks and based on this I make sketches for the circles, firstly in the start of the elbow, then in the end of the 2/3 (120°) and finally in the end of the elbow 180°. I also make two sketches with the axial line of the elbow in the two parts (one in the part of the increased diameter and onr the stable diameter). [/FONT]

      [FONT=&quot]So I have three circles, the last two with the same diameter and the first one with smaller diameter, and two curved axial lines.[/FONT]
      [FONT=&quot]Then I use sweep between the circles with guides the axial lines.[/FONT]
      [FONT=&quot]Finally I save it as IGES so it could be compatible with pro engineer for cam.[/FONT]
      [FONT=&quot]My problem is that between the first two circles, where the horn is, the pro engineer recognizes it as ellipse and not as circle segmentation (which is the desirable for my case). [/FONT]
      [FONT=&quot]In XY axis where I gave the guides is ok, but in YZ it is 1,7% smaller.
      I would appreciate any helpful advice on my question.
      [/FONT]
       
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    3. gary259

      gary259 Member

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      Hi, just some basic questions.

      - Is the part size fine in SW?

      If yes, the problem is the export from SW or the import process into Pro-E or the file format itself.
      STEP or PARASOLID is much better format than IGES (also known as I-Guess).
      Try measuring exported files in these formats.
      If no, is the 1.7% error across all the part? Are the circles definitely circles in SW?

      - What do you mean by XY axis, you can have X-axis or Y-axis or XY plane but XY axis is not clear to me.
       
      Last edited: Feb 13, 2014
    4. egalindo

      egalindo New Member

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      Export to ProE problems

      I just draw in 3D the form you suggest and I don't have any trouble in translating it. So, the problem can come from the modeling itself. If you can supply the model we can see were the problem is. Is surfaces are twisted in an unnoticed manner translating them into another system can lead to unexpectes results. There are some rules to know to avoid this. I'll be glad to examine it.

       
    5. tsifko

      tsifko New Member

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      First of all thank you for your answers.
      I'm sorry for my mistake, with axis, I meant XY plane.
      The part seems fine in SW. The circles are correct, with correct dimensions.
      The problem is in the whole length of the horn part. (2/3 of 180°)
      I will make a STEP format, and check if this works in practice.
      Egalindo can you recommend me any way to check if I there is a problem with my 3D modeling?
      Thank you both once again.
       
    6. egalindo

      egalindo New Member

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      First, trying with _xt or STEP is OK.
      Second, since I don't see problems in this part to be created and exported my guessings go to: version of SolidWorks is old and has flaws (unlikely), translation has settings incorrect that for some reason creates problems (again unlikely), go to Tools->Check Entity where you can make a check.
      Third: sending the part can be the fastest way to see where the problem is.

       
    7. Dale Carlson

      Dale Carlson Member

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      I don't have an answer to your question, but I used LOFT instead of sweep. Worth a try?
      [​IMG][/URL][/IMG]
      [​IMG][/URL][/IMG]
       
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