On Tuesday 06 February 2018 10:37:00 [email protected] wrote: > In an effort to optimize our lathe for spindle synchronized motion a > question came up. Should a machine sound the same when running a G1 vs > G33 at identical feeds and speeds? > > When we spin the spindle at, say, 800 rpm and command a G1 move in Z > at 80 ipm the machine sounds different from a G33 move at those same > speeds/feeds. > > Perhaps for the motion planner that is two different code paths but > regardless should the two moves sound identical? G33 waits for index > before moves but once moving is there something going on that would > cause it to sound different than a non-synchronized move? > > We are wondering if the difference is sound we are hearing is an > indication of a problem in our spindle or in the way we are tracking > spindle speed. > A g1 or g0 move of Z at 80 ipm, is not going to move at the same speed while the G33 is running, because Z in then slaved to the spindles revs, not the codes speeds. And because it must have head room in the controls, z speed while under g76 or g33.1 control will never reach 80 ipm. So yes, its going to sound different. Extremely obvious if useing steppers.
> -Tom > ---------------------------------------------------------------------- >-------- Check out the vibrant tech community on one of the world's > most engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users -- Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
