What magnitude of un-roundness are you seeing. Mounting a dial indicator and sweeping the radius and recording at least every 45 degrees would be most helpful.
On sloppy machines like mine with backlash at 0.003 nominally round holes are produced by a boring head. That is, rough mill to a few thou then bore to make them and me happy. Quicky holes that don't have to be really good are circular milled. Several passes make the surface look better but I'm not at all certain the tolerances get any better. ;-) HTH Dave On Sun, 2011-08-14 at 12:51 -0500, Stuart Stevenson wrote: > I have never seen a perfectly round hole. I have seen many holes that are > within the design tolerance for roundness. Without some knowledge of the > imperfection it is impossible to determine the reason of the imperfection. > Please describe the imperfection. > > On Sat, Aug 13, 2011 at 11:18 PM, Chris Reynolds > <[email protected]>wrote: > > > In the past whenever I've machined holes they end up not perfectly round. I > > wondered if part of that could be because of the backlash compensation or > > some other setting that I have. I don't think my machine has that much play > > in it that it would cause circles to come out like that. > > > > > > Chris > > > > ------------------------------------------------------------------------------ > > FREE DOWNLOAD - uberSVN with Social Coding for Subversion. > > Subversion made easy with a complete admin console. Easy > > to use, easy to manage, easy to install, easy to extend. > > Get a Free download of the new open ALM Subversion platform now. > > http://p.sf.net/sfu/wandisco-dev2dev > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > ------------------------------------------------------------------------------ FREE DOWNLOAD - uberSVN with Social Coding for Subversion. Subversion made easy with a complete admin console. Easy to use, easy to manage, easy to install, easy to extend. Get a Free download of the new open ALM Subversion platform now. http://p.sf.net/sfu/wandisco-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
