topic Re: Parallelogram mechanism in Inventor Fusion (Read Only)

Parallelogram mechanism

MrNickBarker — Tue, 04 Dec 2012 18:53:04 GMT

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.

Re: Parallelogram mechanism

JDMather — Tue, 04 Dec 2012 22:12:43 GMT

Can you attach the dwg file here?

Re: Parallelogram mechanism

MrNickBarker — Tue, 04 Dec 2012 22:36:32 GMT

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.

Re: Parallelogram mechanism

JDMather — Wed, 05 Dec 2012 16:29:04 GMT

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

Re: Parallelogram mechanism

MrNickBarker — Wed, 05 Dec 2012 16:33:25 GMT

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.

Re: Parallelogram mechanism

Phil.E — Wed, 05 Dec 2012 17:50:21 GMT

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

Re: Parallelogram mechanism

MrNickBarker — Wed, 05 Dec 2012 18:38:27 GMT

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).

Re: Parallelogram mechanism

Phil.E — Wed, 05 Dec 2012 19:06:30 GMT

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.