> > I believe that the proposed silicon sphere Avagadro/kg standard is > 95mm +/- 30nm, which is a truly impressive bit of manufacturing. > http://www.acpo.csiro.au/spheres.htm >
Owwwwwww I LOVE shiny stuff...... that sphere looks marvelous. I could not take my hand of it all day 8). And yes, that is a marvel. Speaking of marvel.... To eliminate backlash and try something new at the same time I am setting up my old bridgeport with a new belt I got. It's a 2.5 timing belt with very fine teeth and it's 3 inches wide. If that flexes I don't really wish to be around because the 'reason' of that flex would be something to behold from a distance. To drive it I will direct drive it with a servo and a backlash free cycloidal gearbox which I found on that show in New York for an affordable price. The ratio is 1:30 and the experiment will be done this summer. If it works, it will be a great alternative to a ball screw with all it's hidden issues. Right now I have very little to 0.125 backlash on the X axis. Which makes a very messed up and dangerous operation. I can only cut conventional in one direction or it will eat my breakfast, bit, and material. Time to toss it or overhaul the screw section... R ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
