On Fri, 2010-08-20 at 07:00 +1000, Frank Tkalcevic wrote: > > > Yes, the problem is just what the error message says. There is a move > > > that makes a concave corner but the move cannot be reached (the tool > > > cannot move alongside it as you request) without gouging into the > > > profile of the part. Here is a screenshot showing the situation. > > > http://timeguy.com/cradek-files/emc/viesturs-error.png > > > Is oversimplifying the problem? Looking at the screen shot shows the line > segment in question highlighted in blue. This isn't a simple question of a > tight corner. It is the whole line segment is unreachable without, as the > error says, gouging the part. From the screen grab, the line segment > before looks unreachable too. (assuming left to right movement) To do this > properly, EMC would need to preprocess a lot more than the next line segment > to get this correct. It seems to be asking a bit much of EMC. > > Hmmmm! Unfortunately, the CAM program can't read your mind so it is forced to do what ever the drawing spec's.
Synergy (www.webersys.com) takes an interesting approach; it will cut into the corner as far as it can w/o gouging. Then you either use a smaller cutter or the corner routine with a smaller cutter to appropriately clean out the corners. CAM has to take a conservative approach just to stay out of trouble. One can hand program simple stuff and stay out of trouble. B-splines, etc ... one pretty much has to trust the CAM to do the job correctly. It is too bad but occasionally one must think and plot pretty seriously to fool emc, or any other system, into doing what you want. Life is like that. Dave > ------------------------------------------------------------------------------ > This SF.net email is sponsored by > > Make an app they can't live without > Enter the BlackBerry Developer Challenge > http://p.sf.net/sfu/RIM-dev2dev > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ This SF.net email is sponsored by Make an app they can't live without Enter the BlackBerry Developer Challenge http://p.sf.net/sfu/RIM-dev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
