Hi Jeshua > I am sure with a 10-foot span that the horizontal ballscrews > will sag a little from gravity. Is this much of a concern?
I think for long screws it generally a good idea not to drive the ball-screws, but the nut. While this will not reduce the sag you mentioned, it will greatly improve stability and reduce vibrations. There are special servo with hollow axis that you can directly attach to the carriage frame and the ball nut, the result is nice in-line direct ball-nut drive. But using a belt drive an a standard motor you could most probably build nice drive, too. No as rigid and dynamic and precise, but still much better than to drive a long screw. cu Flo ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
