On Saturday 03 July 2010, Stuart Stevenson wrote: >Gentlemen, > >Generally, yes. I have never done it but I have been told that screws can > >> be mapped for error, if one has the ability to make that fine a >> measurement over the range of travel. That of course assumes your >> screws have essentially zero backlash. > > I used a laser tracker with <.0002 accuracy in the 120 inches of travel > on the cinci. I was able to compensate to <.001 for the full 120 inches > travel of the X axis. EMC2 has bidirectional compensation so you can > adjust for uneven ball screw/nut wear in both directions. This is linear > compensation. Linear compensation is one part of true accuracy. > >Stuart > Dammit Stuart, would you quit that bragging? Poor little old me has only a $4 tape measure when distances like that are to be checked. ;-)
I still wish you would have had a movie camera going when the cinci was oscillating when you first powered it up. Now that would have made an impressive sight indeed. I cannot imagine something that massive dancing at 20 hertz. -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) To see you is to sympathize. ------------------------------------------------------------------------------ This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
