Hi all, With a servo system using quadrature encoder feedback, what is the slowest speed that can reliably be used ?
I would imagine that there is a problem if there are no counts between successive calls to the PID loop ? resulting in jerky instead of smooth slow motion ? any way to improve on this using some smart HAL code ? The setup I'm planning would use a 1000 line encoder (4000counts/rev) motor directly coupled to a 2.5mm/rev ballscrew. If I require one count for each call to the PID loop (1 kHz count rate) then that works out to 0.25rev/s or 15 rpm or a feedrate of 37.5mm/min which does not seem that low ?? comments appreciated ! Anders ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
