On 16 October 2011 15:20, Andy Pugh <bodge...@gmail.com> wrote: > I would be looking at the position loop in the drive for that problem. As far > as EMC2 is concerned it is driving an open-loop stepper system.
(waves hand) I still think this is a problem with the Granite tuning... Does stepgen ever overshoot then return? I can't see any reason why it should. I can imagine that if the trajectory planner's idea of the max accel differs from the stepgens, then the planner might start to decell later than the stepgen can manage (or is allowed to), but I don't think that the stepgen will then count back to the setpoint? The Granite drives are where the position loop is closed, and this sounds to me like a position loop tuning problem. -- atp "Torque wrenches are for the obedience of fools and the guidance of wise men" ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2d-oct _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
