On 10 August 2011 20:25, Tobias Gogolin <usert...@gmail.com> wrote: > Funny I also found the same http://www.geckodrive.com/g320x-p-28.html and > was studying its specifications, but i couldn't find a way this one would > close the loop!
You end up with two loops, one in the drive and one in EMC2. Effectively the pulse-rate out of the parallel port is proportional to the position error, and the pulse rate into the drive sets the drive velocity. That's closed loop, simply by using a step-generator in velocity mode, ie the input to the stepgen from the PID component is a step-rate request, not a step-count request. EMC2 supports this. -- atp "Torque wrenches are for the obedience of fools and the guidance of wise men" ------------------------------------------------------------------------------ uberSVN's rich system and user administration capabilities and model configuration take the hassle out of deploying and managing Subversion and the tools developers use with it. Learn more about uberSVN and get a free download at: http://p.sf.net/sfu/wandisco-dev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
