On Friday, February 25, 2022 10:31:55 AM EST andy pugh wrote: > On Fri, 25 Feb 2022 at 15:19, gene heskett <ghesk...@shentel.net> wrote: > > Out of the alphabet of ABCUVW, which is the proper axis to call it? > > If it is a rotary axis with an axis along Y then it is typically called > "B". That won't change then, thanks.
> > And, does this change the kinematics module which is trivkins now? > > Probably not. This should be a case of driving the Y, with B following it but doing several revs in the length of the stick, with incremental z carving the profile, and incremental starting degrees to widen the resultant spiral path around the maple stick. > It sounds like your job can be done with trivial > kinematics. Complex kinematics on cartesian machines is only generally > needed for TCP code. (TCP means that the G-code references XYZ > positions and BC angles in the _workpiece_ coordinate system rather > than in the machine. And as you know, I best visualise this stuff in machine co-ords. So we're on the same page. In this case B will rotate around 2.5 turns per inch of Y travel, although I'll probably do it in mm's since thats the default for cura when making gcode out of OpenSCAD .stl's. Thread pitch is about 4mm but is scaled for 2 start threads by starting one at 0 degrees, the other 180 away. Half nuts can be printed face up, and both halves are identical. Half nuts will not be articulated though. > coordinates. > There are examples on YouTube if you search for "LinuxCNC TCP") I'll take a look, thanks. Take care and stay well, 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, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
