My experience in my mill has been pretty good I can machine a 100 mm circle within 0.003mm of true round. Measured as close as I can with mitoyo mics. (I'm a full time machinist)
This is posting radius arcs On Fri, 11 Feb 2022, 08:49 dave engvall, <[email protected]> wrote: > Clearly, I've not been reading in the right place. That 7% is new info > for me. I assume that the 7% is a worst case but I have no idea how > someone came up with that figure. I that magnitude of error is common it > is a serious fault but I don't think I've ever seen real errors but > then how many of us have good enough instrumentation to check that. So > much of what I do are perimeters of features that don't have to exactly > match anything else so obviously we get away with it. In reality I > suppose that if you need it nice and round you interp to close and then > use a boring head but that does not solve some conditions. Can't win > them all. > > Dave > > On 2/9/22 4:17 PM, andy pugh wrote: > > On Wed, 9 Feb 2022 at 19:30, dave engvall <[email protected]> wrote: > >> Hi, > >> It would appear that the 'easy' way to compare the two methods would be > >> to use sim or usrspace. That would get it plotted but I doubt the > >> differences, unless gross, would be easily detectable on a plot. > > Thde docs state that a 7% difference was seen, but with some brief > > experimentation I can't see it: > > > > F1000 > > G0 X0 Y0 > > G2 X10 Y0.1 R5.00025 > > G0 X0 Y0 > > G2 X10 Y0.1 I5.0 J0.05 > > M2 > > > > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
