On Wednesday 04 October 2017 05:43:19 andy pugh wrote: > On 4 October 2017 at 02:32, John Bald <robotwiz...@att.net> wrote: > > Has anyone built or familiar with the "spanning beam" or "torsional" > > beam lathe stand? > > It seems to be giving a fancy name to a simple idea. > > I would imagine that a single pin joint at the tailstock end would > isolate the machine from the floor even better.
I'll second that thought Andy. My nearly 70 yo Sheldon has a spring loaded ball and socket joint the right end of the bed sits on. So the right bed foot can be off several degrees from level w/o effecting any twist in the bed. If thats a problem, I see zero reason a chevy light truck ball joint couldn't be fitted to carry the load, and isolate things from a poorly poured floor. I put 2 of them out in the weather 25 years ago as the pivot points for an az-el satellite dish mount I made with motors and a 2 axis controller. The only mistake I made was inadequate weather protection for the azimuth drive jack, which lays horizontal, its filled itself with rainwater, which in turn has frozen and destroyed it several times. The first k band dish we had, its still a 1/4 m.o.a. rifle barrel, way better that a $180k 7 meter dish from scientific-atlanta. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
