Yesterday I was cutting out a new 3D file, a round plate, 10" dia, mahogany. About 20 minutes into the cut which was around 2/3 of the total cut time I heard a grinding noise, I was close enough to the machine to stop it right away. The machine had lost the X-axis by about 2" (I hope that explanation is clear).
I thought that maybe the bit had slipped but it had not. This was a finishing cut with a .25" ballnose but, moderate feed rate, 14 K spindle speed.
I've had this machine for over 10 years, I have a lot of experience with it but it has not been run hard.
I finished the cut by zeroing X Y and Z and edited the file to start at the opposite side of the material.I ran it past the point where the problem had occurred and it was fine.
Any ideas on what might have caused the grinding and loss of X zero?
Phil