On Wednesday 06 January 2021 06:08:23 andy pugh wrote: > On Wed, 6 Jan 2021 at 03:51, Gene Heskett <ghesk...@shentel.net> wrote: > > But this would be a true 3d need as it needs correction in both X > > and Y travel. lincurve isn't made to do that. So how might that be > > done? > > There was some work done on this several years ago (look at probekins) > but it wasn't very satisfactory. > > The same idea might work well now that we have external offsets.
I'll check that out. I have some experience with that as I'm correcting bed wear on the Sheldon by diddling x offset according to Z position, so its within a thou anyplace in the Z travel. To quote an ex Bro-in-law, its "good enough for the girls I go with". ;-) > But: Will it help? If the bed is not flat, and you clamp a workpiece > to it, does the workpiece conform exactly to the shape of the bed? Or > does the bed distort to match the workpiece? > Depending on what I clamp down, somewhere between I expect. > How far out of true is it? A good mm in some of the places I have checked. But now I need to stay at or below .1mm over a foot of travel for this box mod. I could reclamp it, and survey it with my throw away renasys(sp?), but am trying to get enough data I don't have to do it over for each piece I make. Thanks Andy. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
