Why not take a thick bar, 2 inches diameter, and rough machine it between centre's to something like the shape below. You have a slightly larger diameter every inch, but thin, like a washer.
This bar can be re-used, and every time you set out to measure, you blue the high spots and take the slightest of cuts. Obviously now without the tailstock. In this case rather set up a die/mini grinder on the carriage to reduce cutting forces. ____--____--____-- -------_--------_------_ On 26 September 2018 at 11:23, andy pugh <bodge...@gmail.com> wrote: > On Wed, 26 Sep 2018 at 06:13, Chris Albertson <albertson.ch...@gmail.com> > wrote: > > > > On Tue, Sep 25, 2018 at 1:04 AM andy pugh <bodge...@gmail.com> wrote: > > > > > I can't help thinking that the way to determine the amount of > > > correction needed is to actually machine a test bar and measure it. > > > A laser beam is straighter than any bar. and is quicker and costs less. > > Yes, but there is more to making straight parts than having perfect > alignment between the unloaded toolpost and the spindle axis. > > You seem to be assuming that _I_ am the one under-thinking this :-) > > -- > 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-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
