Kirk Wallace wrote: > > For my own education, I am used to stepper systems not having feedback > which would be required for EMC2 to fault on following errors. How are > these errors being indicated? > EMC's internal step generator keeps track of the number of steps that have been issued, and uses that as feedback. The step generator strictly obeys its velocity and accel limits, so if for whatever reason EMC asks for a little more accel than the limits allow, the feedback can fall behind, resulting in a following error.
In theory EMC will never ask for more accel or velocity than the limits specify, but there are some very difficult cases. One of them is backlash compensation - the comp move is done at a fairly high velocity and accel to get it over with as soon as possible. If the direction reversal that causes the compensation also demands high accel, the sum of the two can be higher than the ini file limit. Regards, John Kasunich ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
