On Thursday 04 August 2016 09:18:55 Leonardo Marsaglia wrote: > 2016-08-03 15:07 GMT-03:00 Gene Heskett <ghesk...@shentel.net>: > > Servo's, generally speaking, will use only the power it takes to > > accomplish the job. Ball screws, for horizontally moveing loads, > > will use 1/4 or less of the power it would take to do the same job > > with good acme bolts & bronze nuts, and because of the relatively > > coarse tpi, will move it farther and faster. > > Well, here we're using a delrin nut with 8 mm lead and it's working in > servo mode better than what I expected for a vertical load. > > https://www.youtube.com/watch?v=JX1r7xQHvrI
Pretty short movie, doesn't stay on the screw long enough. I've no experience with delrin nuts but have read good things about them. I would expect clean but lubricated with the right stuff is the key to long life. > The charriot alone is at least 40 kg, and the transformer that's > mounted on weights 60 kg if I remember well. I'm moving it at almost > 10 m/s with a 5 HP AC motor, no permament magnets. I guess if this > machine could be fitted with a heavy ballscrew this would a lot > easier. Anyway, there's the problem of covering the ballscrew to avoid > the water for cooling the part to reach it. 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> ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
