Dave Engvall wrote: > On Oct 30, 2008, at 9:06 PM, John Kasunich wrote: > > >> Dave Engvall wrote: >> >> ay have to try something else. Will check for a menu. >> >>> After the comments (JMK) this afternoon about problems with the Mazak >>> at Galesburg I >>> tried running a program on my machine while doing other things. >>> The program was a pretty generic mill a bunch of identical blocks, >>> first roughing at 4.5 ipm >>> and the finishing at more like 12 ipm. Meanwhile I fired up the web >>> browser since that makes the numbers on >>> my latency test increase about as fast and anything I can do. Didn't >>> even get a bump; even on the rapids between >>> blocks. So while my latency numbers are really horrible, i.e. in the >>> 96K range, I can't demonstrate any degradation >>> in the performance of the mill. >>> >>> >> 96K is NOT horrible at all on a servo machine. It is step generation >> that requires latencies of a few microseconds. Servo machines with >> hardware encoder counters and DACs only need to run EMC's servo >> thread, >> at 1mS. Latencies of a hundred microseconds aren't going to seriously >> hurt things. >> >> The "bumps" at Galesburg were the result of latencies of several >> milliseconds, not a hundred microseconds or so. >> >> Regards, >> >> John Kasunich >> > > Thanks John. I guess I can quit worrying about the messages and > concentrate on making parts. > > Dave > >> ---------------------------------------------------------------------- >> --- >> This SF.Net email is sponsored by the Moblin Your Move Developer's >> challenge >> Build the coolest Linux based applications with Moblin SDK & win >> great prizes >> Grand prize is a trip for two to an Open Source event anywhere in >> the world >> http://moblin-contest.org/redirect.php?banner_id=100&url=/ >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > Build the coolest Linux based applications with Moblin SDK & win great prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > yes, thanks John, i never read an acceptable magnitude for latency in a servo system
TomP ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
