Planetary gear simulation unrealistic!!

[DrBwts]

Hi,

So I'm trying to design a planetary transmission clutch. The video of the simulation is here

http://www.youtube.com/watch?v=LNwmsSHFuPk

The sun gear is the driven gear and the notched plate is the planet carrier (ie not attached to the sun or ring gear directly). now I was expecting the ring gear to rotate freely leaving the planet gears & carrier in place until it hit the stop. But as you can see SW has other plans!

I ran a similar simulation with Gearotics minus the planetary carrier (as Gearotics cant do that kinda thang) and the gear motion was as I expected. The ring gear rotated freely leaving the planet gears in place but still roting about their own axis.

Anyone know why this would happen?

Thanks

 

[rollupswx]

Attach your assembly here.

 

[Eltron]

SolidWorks pretty much falls down when it comes to physical dynamics.

Dan

http://www.eltronresearch.com

Dan's Blog

 

[rollupswx]

DrBwts - can you attach the assembly here?

SolidWorks pretty much falls down when it comes to physical dynamics.

Is anyone going to challenge this statement?
The reason I ask is we have plans to move more towards SWx solutions, but we are currently using an Autodesk solution that works very well in this area (Autodesk Inventor - Dynamic Simulation). I don't want to spend a lot of time learning a tool that, "pretty much falls down" in this area.

 

[CorBlimeyLimey]

As with most things, if it's done right ... it works.

http://www.youtube.com/watch?v=G03ExLj6alI

http://www.youtube.com/watch?v=Q7-dOJoKs90

http://www.youtube.com/watch?v=kbUfitBQZW8

http://www.youtube.com/watch?v=ZwdF96B55lY

 

[rollupswx]

Do any of those address the motion proposed by the OP? (I don't think so, but then I didn't have the patience after the first one is incorrect.)

 

[DrBwts]

No none of them do. In the end I had to introduce a locking lever to the system to get it to work.

As far as the mechanism sim in SW is concerned. It does have some contact issues especially when contacts are complex curves at acute angles.