Four bar linkage

[planetzargon]

I'm trying to create a four bar linkage, with two points I want to adjust until I get it all to fold the way I want. My problem is, how do I connect the last bar? Perhaps there is a better way to do this altogether, in which case, please enlighten me!

[Anonymous · Accepted solution]

See the attached file. I did 3 things:

1. Unlocked joint Rev27

2. Grounded bar2. You can ground any bar, but 1 of them needs to be fixed in space in order to drag the other bars around.

3. Added the remaining joint between bar 4 and bar 5. I wasn't able to add a revolute joint. I suspect something in the model is slightly skewed so the joint origins won't line up. I solved this by using a cylindrical joint, which allows the extra degree of freedom to make the joint work.

[planetzargon]

Thanks for that - the solution here was as you say, to use a cylindrical join instead of a revolute. That worked a charm.

Your speedy response is very much appreciated!