This is exactly why I don't put endmills in collets on cnc mills :-). Some folks do it all the time, but one deal like that will convince a man :-).
I have seen a few odd ones that made me tear my hair out, one was holding a part in 4th axis, in 6 jaw chuck, and milling (4) windows in the od of the part, two of the ports had a funky deal in one corner up near the chuck, the window wasnt square there. After about an hour of messing around we figuired out the machine was bumping into 2 jaws of the 6 jaw and rotating the A axis..that was why it happend in 2 out of the 4 windows, and the.
I have seen a fadal 3 axis wander off while cutting, usually happened during an axis rotation (G68) the huge following error was one clue, also if you defragged the machine meory it would gain 5% to 10% more free space for programs, my guess was some kind of memory leak in the code the machine runs on.
But for the most part garbage in garbage out :-). machines seem to KNOW they have a new guy to play with, they settle down after you get a few more hours at the switches :-).
Bill  |