I have been using Solidworks for a few years but have a new dilemma I am being faced with. I am needing to make a diaphragm that will dynamically move within an assembly. I reviewed this post that is from 2008 https://forum.solidworks.com/message/52844 but figured I would post again since I am still unclear and it is an older posting. This example in the post is exactly what I am looking to achieve. When I downloaded the files from this post I can still not get the diaphragm to move as it did in the posts video so I know I am missing something. I would appreciate if someone could explain the steps on how I need to achieve this effect. Also I use 3DVIA for most of my animations so I am not an expert at motion simulation within Solidworks although I have used it before doing simple explodes. Any help with this is greatly appreciated and I am definitely open to other solutions then the one in the previous post since I am sure Solidworks has come pretty far in the four years since the original post. Thanks to all for your help with this.

Derek Parks