On Sunday 05 August 2018 09:07:29 Ken Strauss wrote: > To clarify: > As Gene mentioned I intended to type "G18 (XZ plane)" > I am not using straight LinuxCNC but Tormach's adaptation that they > call PathPilot. They have different versions for lathe and mill that I > believe change the INI file as Andy mentioned. I was planning to use > the mill version. The parts that I am trying to make include both > tapers and curves so the tool orientation matters. > > I had looked at > http://linuxcnc.org/docs/2.7/html/lathe/lathe-user.html#_lathe_tool_or >ientation_a_id_lathe_tool_orientation_a but obviously not understood > the drawing. Is "Position 9" the controlled point? If I use G10 L1 in > mill mode are the I/J/Q parameters ignored in subsequent commands? > Looking at the drawings for position 9, page 78 of 738, I too am confused. Can we be enlightened? IMO there are only 8 usable positions. Which in the practical world, none are 100% accurate because no one sets up a tool with the full side of its cutting edge inline with either axis. Thats just asking for and usually getting a squeak/chatter and a broken insert.
> > -----Original Message----- > > From: andy pugh [mailto:[email protected]] > > Sent: Sunday, August 05, 2018 7:52 AM > > To: Enhanced Machine Controller (EMC) > > Subject: Re: [Emc-users] Cutter compensation with mill turning > > > > On 5 August 2018 at 04:31, Ken Strauss <[email protected]> wrote: > > > I want to use mill turning using hand written code and I am > > > confused about cutter compensation. > > > > Is this using the mill spindle as the spindle, or using a subsidiary > > spindle? > > > > > Is the controlled point at the centre of a circle specified by the > > > D parameter? > > > > With a lathe tool the controlled point is typically _outside_ the > > tool. Without compensation you will normally get accurate faces and > > diameters, the compensation only really becomes relevant for curves > > and tapers. > > > > The controlled points are shown here: > > http://linuxcnc.org/docs/2.7/html/lathe/lathe- > > user.html#_lathe_tool_orientation_a_id_lathe_tool_orientation_a > > > > I do not know how the system knows whether to use lathe or mill > > style radius compensation. It might be based on the LATHE=1 in the > > INI, or it might be done on a tool-by-tool basis using the tool > > table. For mill-turn the latter option would be more helpful. > > > > -- > > 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 > > > > -------------------------------------------------------------------- > >---------- 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 > > [email protected] > > 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 > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users -- Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
