Odd part is I have hit estop thousands of times over the past four years on this very machine and never lost zero or had the machine coast more than .0005" but now (post ss instal) if I am moving in the x axis at speeds as slow as .5 IPM and hit the estop it will throw the DRO off .276" everytime , regardless of speed", I am running huge DC servos and their is no way the table is moving anymore than .001 after the estop is hit , and surely not over 1/4" . Its not a high speed or inertia related problem its something software related , If I estop while the z axis is moving , even as slow as 1 IPM it will be off .600" everytime . I am familiar with coasting/inertia after hitting the estop and thats not the problem in this case.