Ok, thanks for the responses. I found some thread gauge wires and with them have determined that we are cutting too deep. This would cause the pointy peaks and root, so the next question is why are we cutting too deep…? We believe we are entering the correct value for K (thread depth) but I was observing the DRO and Linuxcnc seems to be sending the cutter quite a bit below where it should stop.
I am going to get some more definitive info what is exactly happening, but I am now wondering if there is a bug in the G76 cycle (causing it to cut deeper than it should) or if it is something on my machine… -Tom > On Jun 2, 2017, at 12:31 PM, Ed <ate...@mwt.net> wrote: > > On 06/02/2017 10:36 AM, tom-...@bgp.nu wrote: >> There is a custom adjusting screw that I buy commercially and when I get >> them the threads have a text-book geometry to them. That is, they have a >> small flat top on the major diameter and small flat bottom at the minor >> diameter or root. They are made to class 2 or perhaps even class 3. I know >> that these screws I am getting commercially are made using single point >> carbide insert tooling on a cnc lathe. >> By the way, this seems to happen for nearly every thread I have cut on the >> machine, but I haven’t cared as much in the past as the screws have been for >> my own purposes, but this one will be used in a product sent to customers. > SNIP > > >> >> I am wondering if I am doing something wrong with the insert I am using or >> what. Any thoughts? >> > Get an insert for that particular TPI, it will leave the proper flat on the > top and bottom of the thread. > > Ed. > > > ------------------------------------------------------------------------------ > 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
