On Aug 7 2015 4:16 PM, andy pugh wrote: > On 7 August 2015 at 12:23, EBo <e...@sandien.com> wrote: >> Possibly, but I cannot tell from the information Renishaw published >> in >> that brochure. > > I think that the target is a barcode. The head can see enough barcode > to tell exactly where it is on the code sequence to within one bar, > then looks at the absolute position of the bars in the viewing area > to work out the rest of the bits of data.
I think it is following on the same idea roughly. Looking at the renshaw they claim it can give you 1nm (1e-9m) or 3.9e-8 inches precision. I have no idea how they are pulling that off besides laser interferometry and ring counting. Can you suggest another method that would work? ------------------------------------------------------------------------------ _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
