On 29 February 2012 10:56, Dave <[email protected]> wrote: > There is a lot of BS on that webpage. Optical encoder accuracy.. > Impressive to those who don't know better I guess. > > This is really the only important fact regarding accuracy: > >>We use Leica laser trackers to measure the volumetric Cartesian > errors. These devices have accuracies of approximately 0.002 inches (51 > microns) in our working envelope. > > Those are required to get any decent accuracy on a machine that large. > That machine probably grows and shrinks a quarter of an inch or more > with temperature swings. > > Dave > > >
What temperature swing? 0.2deg ? Temp control is cheap. Regards Roland ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
