Crash During Motion Simulation

[jsaluti]

I made a simple gear assembly to try the joints and motion simulation and every time I try to run a motion simulation, 360 crashes.

The contact function also seems to only partially work, allowing the gears to partly pass through each other.  It lags.  I can't seem to figure out how to attach the file.  Its saved in my user directory I assume online and i cant figure out how to save it locally. Any help would be appreciated.  Thanks.

[jeff_strater]

I'll answer the easy question first:  To archive a file locally so that you can post it to the forum, choose Export:

then, for type, choose "archive files (*.f3d)

This will export the file to your local disk and that file can be uploaded to the forum.  You will have to zip it up first, because .f3d is not one of the file types recognized by the forum software...

OK, now the harder question to address:  Certainly, Fusion should not crash, and if you can post your design we will investigate it.  However, if you are trying to model gears, I would not recommend using contact sets to do it.  In theory it should work, but it is a very expensive way to do it.  Contact sets work by detecting interference at each increment of the motion simulation.  This is a geometric computation, which is fairly expensive on its own.  Especially for gears, which have a lot of geometry to them.  Instead, I would recommend using "Motion Link" to simulate gear motion:

This command lets you tie the motion of two joints to each other.  It offers a scale factor, which can be used to simulate gear ratios.  You will be much happier with the results, I think.

Jeff Strater (Fusion development)