i forgot to say that all good grinding machine have linear incoder or scale alog a axis so inaccuracy of ball screw will not effect final out put of servomotor. am i right?
> Hi Aram > > I don't think it's the diameter that's important (unless the forces on > the screw will be very high). The important specs have to do with screw > pitch error, preload on the ballnut, and also the end bearings. A good > screw will have maybe 0.001 error over 1 foot, the best I saw with a web > search were only 0.0005"/foot. To get the kind of precision you're > looking for, you will likely have to have very good temperature control > (like coolant through the screw), do an analysis of the amount of flex > in the shaft due to loading, etc. > > I think the precision of the mechanics will be a much bigger problem > than moving a motor at low speed. > > IANAME, so YMMV (I am not a mechanical engineer, so your mileage may > vary :) ) > - Steve > > [EMAIL PROTECTED] wrote: > >>I bought everything from company that represent company from Taiwan, and >>it is 20 mm in OD and pitch 5 mm. that screw only as a demo to show how >>slow it can go. Real machine will have much larger OD of ball screw. >>aram >> >> >> >>>On Thu, 2008-05-22 at 19:59 -0600, [EMAIL PROTECTED] wrote: >>> >>> >>> >>>>my ball screw has 5 pitch per inch. >>>> >>>> >>>What are the specifications of that screw and nut? >>> >>>Rayh >>> >>> > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
