On Thursday 01 December 2016 07:55:08 andy pugh wrote: > LinuxCNC supports arcs in XY, ZX, YZ planes > It also allows cycles(?) in the UV, WU, VW planes. > > During my work on G71 / G72 (which attempts to support any plane) I > have realised that a multi-axis lathe might want other combinations. > Noting that there is quite a lot of clear space in the region G17.0 to > G19.9 I have come up with the following: > > https://docs.google.com/spreadsheets/d/1C_vm5pExMxhw5hccaCCjmV5YAAPno4 >YuDGFd-bGzNKI/edit?usp=sharing > > It would be easier if we decided that G16 was spare (used for polar > coordinates on some controls, so _almost_ appropriate) as there are > not quite enough G-codes for all the combinations.
There are folks here with much bigger oars to steer LCNC than mine, but I like it. My vision for this Sheldon lathe involves making yet another toolpost base, with some sort of a well built harmonic drive to rotate the tool post so the side attack angle could be controlled by gcode within a running program so that turning and faceing become just a matter of specifying the desired angle for the next cut. Ideally with a touch the contact method of self calibration of the tool tips swinging radius so a g1z## x## puts the cutting tip in the same place where ever it is set in the instant angle. I think I can hack it up in the gcode we have now, but its pretty complex. Another area I would love to see is the ability to tilt a co-ordinate plane by adding an Rx,Ry,Rz(the other 6 letters too of course) argument. Currently its about the Z axis only, so carving a Z taper gets math intensive. Either way, its a great detector of stiction in the z movements of ones milling machinery :( Thank you Andy. 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> ------------------------------------------------------------------------------ _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
