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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
