If you are bending a screw the speed does not matter it is the acceleration. That is measured in meters per second squared (or whatever the Imperial equivalent is? feet per second per second?)
I think a typical low performance mill like most of us have might have go a 2m/s^2 A very high performance one might do 20m/s^2 If the mill can do about 10m/S^2 then the force on the ball screw is equal to the weight of the table and whatever is bolted down to it. Remember what Newton said "f=ma". Which happens first the ball nut breaks or the screw bends is determined by the length of the screw from motor to nut. Gene when you used the motor in a design where there was a very large static load, where the motor had to hold the weight of large vertical moving head you'd expect poor movement compared to a horizontal axis. On Fri, Feb 16, 2018 at 12:54 AM, Gene Heskett <ghesk...@shentel.net> wrote: > On Friday 16 February 2018 02:20:40 jeremy youngs wrote: > > > Chris, I think you are spot on . Nema 34 1600 oz in. And automation > > direct 110v drives. > > I have one of those motors. On the Z of my mill, with a 60 volt psu, very > poor performance. 27 ipm or stall lifting the head on the G0704. Its now > on the sheldons Z and while noisy, is also about 4x faster. > > > I had y at 300 ipm 9×42 table. It was a very cheap > > ballscrew and I had it cobbled together now that the Machine is 3 axis > > and spindle functional I will be able to make some belt and pulley > > mounts and resolve some issues. > > ---------------------------------------------------------------------- > >-------- 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 > > > > -- > 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 > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California ------------------------------------------------------------------------------ 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
