I don't think the POSITION_FILE works reliably w/ steppers. When you shut power off a stepper, it wants to move to a full step position (where it 'cogs'). Power was being applied to hold it at a partial step which is no longer available. So when you turn power off, the machine moves slightly. Thats problem 1.
Problem 2 is powering back up into those same exact micro-step. AFAIK, there are no stepper drivers on the market that remember their position. So it doesn't matter if EMC remembers its last position. The motor drivers typ power up at a full step. AFAIK, there is no way to restore their state (without stepping them, but you didn't know the state at shutdown anyway.) So you've lost up to a 1/2 step. Best (only?) solution is to re-home and continue. SMD ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
