On Saturday 25 February 2017 16:13:23 bari wrote: > On 02/25/2017 02:17 PM, Tomaz T. wrote: > > I'm in doing a little research on replacing "low pitch" slow > > ballscrews with faster R&P and found this anti backlash system: > > > > > > https://www.damencnc.com/en/components/mechanical-parts/rack---pinio > >n/320 > > > > > > > > Does anyone here use it, and is it worth of investment compared to > > single pinion "standard" drive? > > It works! It's nothing new. Two servos are used where one drives the > pinion gear and the other acts as a slave on a second pinion > preloading the rack to remove the backlash. > How much gear mapping does it require to get the same accuracy the ball screw can deliver? Seems to me there has to be a tooth by tooth cyclic non-linearity, repeated for the number of teeth per rev of the pinion? Severely angled teeth might work pretty good, and I see some of that in the anims.
> http://www.atlantadrives.com/systems1.htm > > http://machinedesign.com/motorsdrives/separating-rack-and-pinion-myths >-reality Cheers Bari, 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
