On Thu, 2008-01-17 at 13:27 -0600, Witek GB wrote: > I want to add an EMC CNC controller to my bridgeport clone however, > before I start, I was thinking of retrofitting and installing ball > screws. I think I have too much backlash in what I have now. I have > a taiwanese 10" x 50" bridgeport cone with a M cast into the main > casting. So who sells zero backlash ball scres that are atleast as > accruate as +/- 0.0005/Ft and how much would the setup cost me if I > wanted to put it on my mill? > > Thanks > > WGB
I am doing a 42" x 9" table Bridgeport conversion now. The Hiwin rolled ballscrews I ordered for it were just under $700, has .002" backlash and is rated at .002" error per foot (Ground, .0005" error Hiwins are somewhere around $1400 ). Due to the backlash and other issues, I am looking at Microkinetic screws at just under $1000, .003"/per foot error, with double nuts so the backlash can be adjusted out (also has and oil system ports). I think Micrkinetics also does custom screws. Be careful, when ordering screws, to make sure you understand what you want, and what you will be getting. Don't assume anything. ( See: http://www.wallacecompany.com/machine_shop/bridgeport/ (bottom half of page) and, http://www.microkinetics.com/convkit.htm (about a third of the way down) ) If anyone has had good results with purchasing and using ballscrews, please let me know. Buying ballscrews, just to see if they will work, can quickly kill a project. -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC lathe, Bridgeport mill conversion, doing XY now, Zubal lathe conversion pending) ------------------------------------------------------------------------- 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
