On Jul 20, 2012, at 8:27 PM, Stephen Dubovsky wrote: > "whipping" around. You have a long thin rod that will be spun at high > speed. Its going to act like a "jump rope" ;) Im told long machines hold > the screw stationary and spin the nut to solve that problem.
Hi Stephen, It is easy for me to imagine it bouncing up and down a little, but apparently I am lacking the brain power to imagine what would actually make it whip. It seems either end would have to be rapidly moved up and down (or side to side) for a whip to occur and the ends will be planted quite stationary. The table will move 2 inches per revolution, so even at 550 RPM, it would move the whole length of the rails (10 feet) in 10 seconds which seems really fast to me. The table weighs about 250 pounds, so I can't imagine moving it faster than that. 550 RPMs does not exactly strike me as spinning at high speed. Besides, wouldn't the gyroscopic force help stabilized oscillations? Thanks, Jeshua Lacock Founder/Engineer 3DTOPO Incorporated <http://3DTOPO.com> Phone: 208.462.4171 ------------------------------------------------------------------------------ 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
