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    Inventor Fusion

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    Member
    Posts: 4
    Registered: ‎12-04-2012
    Accepted Solution

    Parallelogram mechanism

    378 Views, 7 Replies
    12-04-2012 10:53 AM

    I'm trying to build a simple parallelogram mechanism which should lift a top plane.

     

    My problem is that as soon as I add the last joint the model won't move and I get "Distance conflict due to joint type". 

     

    I'm guessing that it's mechally imposible for the joints to move the way they are setup, I've attached an image so you can see better.

     

    Thanks in advance.

     

    Screen-Shot-2012-12-04-at-7.51.11-PM.jpg

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    *Expert Elite*
    Posts: 21,728
    Registered: ‎04-20-2006

    Re: Parallelogram mechanism

    12-04-2012 02:12 PM in reply to: MrNickBarker

    Can you attach the dwg file here?

    Please mark this response as "Accept as Solution" if it answers your question.
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    Member
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    Registered: ‎12-04-2012

    Re: Parallelogram mechanism

    12-04-2012 02:36 PM in reply to: JDMather

    The file format which Inventor Fusion for Mac allows me to save is f3d and this forum doesn't allow f3d extensions for attachments, so I just replaced the extension with .dwg change to .f3d to open again.

     

    I tried to use export but there isn't dwg there either.

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    *Expert Elite*
    Posts: 21,728
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    Re: Parallelogram mechanism

    12-05-2012 08:29 AM in reply to: MrNickBarker

    I didn't realize you were using Mac version or that Mac version would not allow you to save dwg.

    Please mark this response as "Accept as Solution" if it answers your question.
    -----------------------------------------------------------------------------------------
    Autodesk Inventor 2013 Certified Professional
    Autodesk AutoCAD 2013 Certified Professional
    Certified SolidWorks Professional
    Inventor Professional 2013 SP 1.1 Edu 64-bit
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    Member
    Posts: 4
    Registered: ‎12-04-2012

    Re: Parallelogram mechanism

    12-05-2012 08:33 AM in reply to: MrNickBarker

    It allows me to export to SAT, STL or STEP. When saving there is no option to choose type, it just saves it as f3d.

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    Employee
    Phil.E
    Posts: 80
    Registered: ‎06-29-2012

    Re: Parallelogram mechanism

    12-05-2012 09:50 AM in reply to: MrNickBarker

    Looking at your model I see a few problems. See attached image.

     

    The joint origins are not lined up. This will cause the mechanism to bind. A mechanism like this requires the same joint origin spacing on both parts that the link bars are linking.

     

    Please mark this response as "Accept as Solution" if it answers your question

     

     

    Please mark this response as "Accept as Solution" if it answers your question.




    Phil Eichmiller
    Software QA Engineer
    Fusion Quality Assurance Team
    Autodesk, Inc.

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    Member
    Posts: 4
    Registered: ‎12-04-2012

    Re: Parallelogram mechanism

    12-05-2012 10:38 AM in reply to: Phil.E

    Thanks, thats what I figured.

     

    Is there an easy way to align joint origins or to snap them toghether? A link to a tutorial would be apreciated (I've watched the esentials videos).

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    Employee
    Phil.E
    Posts: 80
    Registered: ‎06-29-2012

    Re: Parallelogram mechanism

    12-05-2012 10:56 AM in reply to: MrNickBarker

    Use [sketch>circle>extrude cut] to accurately locate holes. Use the holes for Joint Origins. Or use other geometry such as edges or corners that the Joint Origin command wants to snap to.

    Please mark this response as "Accept as Solution" if it answers your question.




    Phil Eichmiller
    Software QA Engineer
    Fusion Quality Assurance Team
    Autodesk, Inc.

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