Started a project yesterday and when it got to the "measure the board" step, the board (a 1/4 in. thickness) was simply ejected from the machine but the motor keep on running and had to push the Stop button. I tried a different, thicker board and the measurement process caused the board to dance back and forth on the traction drives. The motor sounds like its straining or jamming somewhere. Read a post that suggested the sandpaper belts have shifted and are binding but haven't checked that yet. But if that's it, how do you move the belts back on center? Any other suggestions as to what might be happening? The machine only has about 20 hours on it.