So my GF is less than a week old and has a moderate amount of usage getting use to it.
Today while cutting some heavy card stock (.008 thick) running at 500 with 65 power it made a thud a couple times. Sounded to me like a belt slip off one thread to another on a 3d printer. There was nothing on the bed that it would be hitting. the design was may 5 inches square. And in the middle of the bed.
The design did not come back together at the end of the cut. It was just a couple minute vector cut and should have come back to match up at the end.
I slowed down to 250/31 and reran it . it seemed to run OK.
So what happened??