Greetings
> Neither, of our 5x10 routers have any support on the long table screws (12 ft long). But they are large diameter screws, secured, fixed and stretched in position with a rotating nut moving the table. I think rotating the nut rather than the screw helps a lot with wip. The rotating nut and fixed screw totally eliminates the dynamic problem. But bearings and driving a conventional nut is (as mentioned before) not straightforward. The phenomenon is often referred to as "critical speed" and "whirling". This link is not too mathematical http://www.freestudy.co.uk/dynamics/forced%20vibrations.pdf Another illustration of the belt stretch avoiding architecture is at www.castlewoodconsultants.com/Misc/83113-A_Better_Belt_Drive_A.jpg John Prentice ------------------------------------------------------------------------------ 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
