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  1. #11
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    I don't quite get what you're saying... I was doing a flat (2d if that's what you mean) drawing in isometric view, I only started with the 3d at your suggestion for the U-bolt. I learned a good deal about 3D drawing a few years ago, but tend to stay away from it on most things because I get frustrated with things snapping the the wrong sides of things and only realize it after rotating the view to another angle. I've actually been doing this for awhile, but for the most part (until recently) the drawings I've been asked to do are so spread out I find myself having to go back and relearn what commands I need to accomplish something and/or how to use those commands again.

    Pretty much all the work I've done with Autocad has been 2D work, and due to time limitations, many times it's just been simple line drawings of tank batteries, rather than actually drawing out the pipes, valves, fittings etc. I have no problem doing plan view, and elevation view drawings, where I know exactly what the angles need to be, but when It comes to isometric drawings I get stuck trying to figure out how to make things look right. Seems like I ran into similar problems in 3D, trying to figure out how to get fittings/pipe to snap to the spot I want on the tanks. That the frustration with things snapping to the wrong side of something, and I just cant tell. And wireframe sometimes just makes everything even more confusing.

    I took a class on autocad and got my associate certification, but they had no offerings for 3D modeling to further my knowledge in that aspect.

    I forgot to mention, I know this particular drawing doesn't have to be perfect, as I stated earlier I figured out a way to do it originally that got the point across, and just explained it in my email that the ubolt wouldn't be all thread, but I would prefer my drawings to look more professional, and situations like this give me a way to learn how to get the desired results.
    Last edited by mrkmpn; 19th Nov 2013 at 08:58 pm. Reason: Additional information

  2. #12
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    mrkmpn - I agree with the guidance to draw that in 3D. For your Isometric - if you simply want to make your u-bolt not look like it is made from all-thread, just erase the ellipses along the curve of the u-bolt and down along the straight part as far as necessary.
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  3. #13
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    mrkmpn: Any chance you are using the old 2D isometric mode that is accessed via SNAP > STYLE > ISOMETRIC and the crosshairs (for the isometric planes) are controlled via the F5 key?
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  4. #14
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    Here you go.


    U-BOLTS-.dwg

  5. #15
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    gazza_au: It might be nice to mention the source of the drawing that you provided (looks like Andry Brenkman's AutoCAD 2004 drawing posted over at the CADforum). I think the OP wants to know "how" it would be done and not necessarily have it provided for him. BTW...there are no threads on any of the U-bolts in Brenkman's drawing which is one of the things discussed by the OP.
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  6. #16
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    UBOLT_1.jpg
    One way to create a 3D U-Bolt. Everything in the image was created in a top down view using a 2Dwireframe visual style.

    On the far left is my 2D centerlines. The red lines represent the threaded portion of the U-bolt. The yellow objects you see are 3D solids. The smooth top portion of the U-bolt was created by sweeping a circle while the "threads" were created by revolving a closed profile. Since all we need is a pictorial view I see no reason to use a helix and a swept profile of the tooth. On the far right is the 3D model of the threads. Are you with me so far?
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  7. #17
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    UBOLT_2.jpg
    Now what's changed?

    I've simply switched to the standard SW Isometric view of my objects and used a Conceptual visual style. Nothing has been rotated at this point.
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  8. #18
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    UBOLT_3.jpg
    Can you see me now?

    To achieve this I changed the orientation of my UCS and rotated the 3D solids. I moved the single solid thread to one leg of my U-bolt and copied it to the second. I unioned everything together and switched to a Realistic visual style. It probably took no more than 5 minutes to create.

    Note that changing your UCS can be done manually (old school) or via the Dynamic UCS. Choose the option you feel the most comfortable with.

    Disclaimer: The above was meant for demonstration purposes only. Any semblance to accuracy was purely accidental!
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  9. #19
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    UBOLT_4.jpg
    The threads were bugging me so I changed them from very coarse to fine.
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  10. #20
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    mrkmpn: Any chance you are using the old 2D isometric mode that is accessed via SNAP > STYLE > ISOMETRIC and the crosshairs (for the isometric planes) are controlled via the F5 key?
    Yes, I think maybe that's where to confusion comes in. For most things that's the easiest way for me to get a 3D look without having to do it all in 3D.

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