Jon Elson wrote on 28/11/2007 04:05: > I think the above quoted text should read "Only one offset word > is required". You definitely can have two. I think with the > in-plane only arcs that EMC does, you can't have 3. Some > controls allow arcs in arbitrary planes, and you can have an arc > move with XYZ and IJK words! I can imagine all sorts of > conditions where the plane of the arc is not uniquely defined.
Actually, only 180° arcs would be underdefined in a 3D (not plane-bound) arc. That's because a plane is always well defined if three points on that plane are known and are not on a single straight line. So in theory, one could implement plane-free-arcs in EMC with the added error condition of the start and end points defining a line which also contains the center point. (i.e. xstart+2*I=xend, zstart+2*J=yend, zstart+2*k=zend) Regards, sven ------------------------------------------------------------------------- SF.Net email is sponsored by: The Future of Linux Business White Paper from Novell. From the desktop to the data center, Linux is going mainstream. Let it simplify your IT future. http://altfarm.mediaplex.com/ad/ck/8857-50307-18918-4 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
