Motion Link only shows one component moving

[david.svoboda7Z5KQ]

I am making a simply belt pulley reduction drive train and the drive pulley joint and driven pulley joint both work fine and show rotation.  When I make a motion link with both pulleys, the animation only shows one of the joints rotating.  What did I do wrong?

[davebYYPCU]

No timeline. Nothing to diagnose.

Nothing grounded.

The gear ratio is 1:1, unlikely to be real life.

Might help....

[mufuo · Accepted solution]

As @davebYYPCU said, many things are missing. If you watch this video (Belt Drive (pt 2) Motion Link - Day 76 of 100 Autodesk Fusion 360 Journey - YouTube) with a simple example, something may change.

[david.svoboda7Z5KQ]

The gear ratio is 14:36 then, 14:36.  But I havent created rigid joints yet to make that all work, still stuck on the motion link.  Ill watch the video posted in another comment.   Thanks for the reply!

[david.svoboda7Z5KQ]

I will watch, thanks!

[davebYYPCU]

With the ratio plugged in and the large gear axle grounded I expect the Motion Link to operate correctly.  The joint icon was turning for both gears, but you can not see the larger gear axle turning.

Might help…..

[david.svoboda7Z5KQ]

@mufuo So the only thing I did differently was to ground the shafts that the pulleys rotate on.  Then it worked!  Thanks again!