Hi One way to measure diameter errors to get the corrections is to fit a dial test indicator gauge so it measures a point 180 degrees from the cutting tool. Any errors in the turned diameter will be doubled.
For example, if the cutting tool path has an error of 0.01mm, then the diameter error will be 0.02mm. A DTI mounted opposite the cutting tool will see a 0.02mm error. This method assumes the cutting tool path is repeatable. > On 27 November 2019 at 12:00 andy pugh <bodge...@gmail.com > mailto:bodge...@gmail.com > wrote: > > > On Tue, 26 Nov 2019 at 23:46, Gene Heskett <ghesk...@shentel.net > mailto:ghesk...@shentel.net > wrote: > > > > On Tuesday 26 November 2019 13:59:39 andy pugh wrote: > > > > > > > On Tue, 26 Nov 2019 at 16:42, Gene Heskett > > <ghesk...@shentel.net mailto:ghesk...@shentel.net > > > > > > > > > > > > > > > I'd expect a better cylinder, but not perfect on a .0001" dial. > > > > > > You can't use a dial. That depends on your (known flawed) lathe to support > it. > > A lathe exists to make accurate diameters. So measure the actual diameter > with a micrometer. > > Start with what you are _trying_ to make, and measure how far from spec it > is. > > > -- > atp > "A motorcycle is a bicycle with a pandemonium attachment and is designed > for the especial use of mechanical geniuses, daredevils and lunatics." > — George Fitch, Atlanta Constitution Newspaper, 1916 > > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > mailto:Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers > _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
