On 10/27/2015 08:31 PM, lloyd wilson wrote: > (my misunderstanding, I'm sure) > > I'm investigating using the built-in cutter compensation, rather than > calculating absolute coordinates. The first program worked OK, but > LCNC complains about the following excerpt: > > 14: G41 > 15: G0X0.0000Y24.8610 > 16: G0Z-17.0000 > 17: M3 > 18: G1X7.5850Y21.5360Z-19.0000 > 19: G1X12.9820Z-19.0000 > 20: G1X24.4020Y11.5920Z-19.0000 > 21: G2X25.8100Y8.5000Z-19.0000I21.7100J8.5000 > > (nn: numbers added in text editor) > > The complaint is 'straight feed in concave corner cannot be reached by > tool ..... near line 19'. > With G41 active, the corner defined by lines 19 & 20 is convex - isn't > it? > > Would appreciate help untangling this conundrum > > thanks > > lloyd
If G90.1 (absolute arc distance) is active, it should work as programmed. If G91.1 (incremental arc distance) is active, that would put the center of the arc at location X46.1120 Y 20.0920 and make a very large arc with a radius of 23.305. The line into the start of the arc (line 20) would be the inside of an acute intersection with the arc - a concave corner. And if that were the case, the ending point of the arc doesn't match the ending coordinates in line 21 - close, but not quite. If you substitute I-2.6920 J-3.0920 in line 21, does it then work? Craig ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
