How do you let the COG take over in a fulcrum situation?

[Anonymous]

I have a part in an assy that can either be in position or rotated up out of the way using a lever. This part reminds me of a ferris wheel chair - as the ferris wheel turns, the chair rotates based off the COG. Is it terribly difficult to create this constraint or even possible? Thanks.

[Anonymous]

Creating the ferris wheel constraint is fairly
easy.  Create an create an axis in the chair part that is in the direction
chair would hang.  Set an angle constraint so that the axis is normal
to your ground plane.

Your best bet for placing the axis in the chair is
to put a workpoint at the COG and on the same plan at the intersection of the
pivot center.  Create your direction axis between these two
points.

Another way, if you know at which angle the chair
needs to hang already, is to just place an angle constraint between one of your
origin planes and the ground plane.

Pat

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I
have a part in an assy that can either be in position or rotated up out of the
way using a lever. This part reminds me of a ferris wheel chair - as the
ferris wheel turns, the chair rotates based off the COG. Is it terribly
difficult to create this constraint or even possible?
Thanks.