Without thinking too much about it... would it not be 255? (in computer terms - you don't start at 0)
sam On 8/6/2013 10:25 AM, andy pugh wrote: > I am in discussion with a chap who is retrofiting a Hardinge HXL. It > has linear scales, interpolator boxes set to 256x and is running a > 5i25/7i77 combo. > > The repeatability is good. Actually is is better than good, it returns > to the exact same digit on a 0.1um (0.000004") length probe every > time. > http://youtu.be/2oWc6val6ME > > The problem is that the travel distance isn't accurate. A 50mm move is > out by 0.158mm. The encoder scale is set to 25600 (10um scales, 256 > interpolation). > It doesn't seem like it could be missed encoder counts or the > repeatability wouldn't be so good. > > Any ideas where to look? Bear in mind that this is all done by linear scales. > ------------------------------------------------------------------------------ Get your SQL database under version control now! Version control is standard for application code, but databases havent caught up. So what steps can you take to put your SQL databases under version control? Why should you start doing it? Read more to find out. http://pubads.g.doubleclick.net/gampad/clk?id=48897031&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
