On 19 August 2014 17:17, Florian Rist <[email protected]> wrote: > I think I'm somewhat misunderstanding all the 5axis positioning in > milling. For example I always wonder why the xyz workpiece coordinates > of the tool tip do not change when I rotate and/or tilt the table. In my > understanding I'm rotation the coordinate base, so if the tool is not > moving in the machine base coordinate system this is still causing a > motion in the workpiece coordinate system. In other words if I'm the > workpiece I see the tool move, why do the workpiece coordinate not > change?
It all depends on the kinematics, and how they are set up. The rest of LinuxCNC knows nothing about this/ It simply reads tha "X" word from the G-code (for example) and then the kins converts that to a joint.0.motor-pos-cmd. It is all just numbers to the controller, which has absolutely no knowledge about geometry. So, there are many different ways that a 5-axis kinematics can be set up to work, and I am not sure that there is any "correct" one as such. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
