This is a G76 canned cycle and I usually enter 1 (sometimes 2) spring passes. The spring pass(es) take no material so this isn’t a deflection problem.
My theoretical thread depth was 0.0255. I ended up needing to set it to 0.0280, but once set it cuts correctly and repeatably. I thought it was interesting that 0.0280 - 0.0255 is .0025. .0025 is extremely close the distance between a 0.06mm radius tool and the imaginary tip of that tool ((0.00236 to be precise) ….Coincidence? -Tom > On Jun 4, 2017, at 9:56 PM, Jon Elson <jonelson...@gmail.com> wrote: > > > On 06/04/2017 08:22 PM, tom-...@bgp.nu wrote: >> I have to increase the depth a couple thou and re-cut the thread to cut it >> deep enough. > Due to machine spring as well as workpiece deflection, a second pass without > even changing the X depth will take off some material. So, if you turn it > down, measure, and then feed in a few thousandths in Z and cut again and get > the desired depth, that will get you a too shallow cut if you try to cut at > the same Z depth on the next part. > > Jon > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
