Fusion
A Motion Study will be the only possibility and I pretty sure it will be unsuccessful also. Fusion 360 has a hard time running to joints simultaneously especially when the motions are sharing a lot of common joints. I believe the joint causing the issue is your ball joint of the eye. Logically it makes sense the way you have it but Fusion 360 is being asked to animate this joint in two or more directions at the same time.
John Hackney, Retired
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He said, A Motion Study will be the only possibility and I pretty sure it will be unsuccessful also,
Nah, all things equal will work with click drag.
@Catherine__P Come back there's some good news,
Your assembly will work when you fix the misalignments, so often it's misalignment that breaks joints.
I didn't get far into the review before the most important joint, was showing anomalies. This Ball joint does not line up with the actuating components.
Actually it's present in the first 2 ball joints I checked, and I suspect all of them, now.
The joint aligns to the small (male) sphere, and it's female socket, but does not align with socket pushrods.
When you get those sorted, you will need a Ball Joint on this end, too, because the other end is coincident to a sphere, this pushrod can't swing in this horizontal direction in the picture.
and would be locking the file right there.
Might help.....
Ok, reviewed both files, as I am coming in cold, the first is obvious, but is it relevant?
Not working got tilted, in what looks like 2 directions, the servo horn no longer looks like it is horizontal (blue Line) aligns close one end and the other not so close, but that can be 3d illusion.
However, Not working does work with click drag on the eyelid. It gets jerky, and you are right moving, the arm does not work. Now it comes down to how far you want the eyelid to move. The pushrod is longer than the distance between the lower pivots. So as the angles change it will get to a point where they will bind, over top dead centre, will be fine, the lower the pushrod is taken, the more binding, will happen.
My rule of thumb, set the eyelid at halfway travel, set the servo arm at halfway travel, and test until it binds up. Ideally the 2 lever arms are parallel in this position, the pushrod length and pivot spacing don't have to match but would help if they do. At halfway the push rod 90 deg to the arm/s
Might help.....
Got the file,
First delete all Contact sets, they cause trouble, like you describe.
Gone....
I have also circled the Capture and Revert icons, clicking on Revert, will reset all previous unsaved moves.
Quick check, Click Drag the eyelid, all works as expected. Click Drag the eyeball, it too, is working as expected, after trial moves Click Revert. (White Icon.)
Next there are some yellow warning icons, best to fix those when they happen, simple as Undo.
Ask questions if you don't know how to avoid them.
Might help....
Good news - bad news,
The eyelid mechanism, is misaligned, here...
The bad news is that the servo, and pushrod, was built off the bad bit.
When fixed should come right.
The correct alignment belongs to the round disc face, and the vertical rectangle face is not parallel. Means that the eyelid will drive and work with the click drag.
0.001 degree makes a difference, click drag is Ok, but driving the servo it is not.
The relevant sketch was not in it's component, so when it sorted, making the black line vertical, (delete the Perpendicular constraint to the hoop), it will all rebuild and click drag can now turn the servo arm. Drive the servo arm, only goes in one direction travel limit will fix this.
Might help...
