In any orientation the calculations must use the center of the cutter radius. This applies to milling and turning. Cutter compensation must know the corner radius when using a turning insert and the cutter radius when milling.
On Sun, Aug 5, 2018, 8:08 AM Ken Strauss <[email protected]> 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_orientation_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? > > > -----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 > ------------------------------------------------------------------------------ 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
