Joint to keep two planes aligned

[eric202020]

I need to align the center plane of a beam with another plane (formed by 3 points in a 3D sketch in this example).  A rigid joint doesn't automatically keep the planes aligned if the plane is changed.

I've seen a few similar threads, but haven't found anything like this case.

In the screen cast, I show creating the rigid point and updating the angle to make sure the plane formed by 3 points in a 3D sketch are aligned with the plane through the center of the beam.  If I then move a point in the sketch, I must manually update the angle again.

Is there a way to do this automatically with a different type of joint or some other feature?

[davebYYPCU]

No screen cast.

Planes have no geometry so I would say not possible at this stage, because Fusion uses common points in the construction of the Joint, changing the angle of a plane not totally related to the joint has no effect.

Might help....

[eric202020]

Thanks for the fast reply.  I've added the screencast and made sure to click on "Insert" this time 🙂

The plane is actual a midplane of real geometry, so there should be a solution that I'm just missing.

[davebYYPCU]

As I said, without the movie, 

the moving sketch point has nothing tied to the joint, and nothing to do with the midplane

A line in that sketch instead of the axis, and the joint disc tied to the line, will get it done.

Might help....

[eric202020]

I removed the axis so it is just a line.  Unfortunately, the joint disc doesn't rotate with the line as it stays true to the coordinates, so the exact same problem.

[davebYYPCU]

Delete the perpendicular line causing the wrong selection to be made.

You need the joint disc to align on the long line midpoint - for a fighting chance.

The line moves with the moving point, the bar has to maintain alignment.

Might help....

[eric202020]

OK, adding a new joint origin on the perpendicular line and then selecting the line (where the axis was) as the X-axis of the joint origin fixed works!

I'll do a screen cast for it tomorrow.

[davebYYPCU]

Yep, nothing to do with either plane.

[eric202020]

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@davebYYPCU wrote:

Yep, nothing to do with either plane.

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Other than what I'm doing is using the planes to attach a sketch to and doing the lines to attach a joint origin to just so I can place a component.  Joints are very nice in typical cases (bolts, etc) compared with constraints in other CAD systems, but things like this are not very intuitive and seem hacky IMHO.