My jointer is relatively new (13 months). Initially, I did have an issue with the fence staying square with the table whenever I moved the fence. Grizzly sent a new fence carriage that solved the problem. This morning, I had a new problem; when I started the machine, it vibrated terribly (extremely noisy)! My initial thought was that the belt was loose. When I checked, everything was in order...so, I started it back up, same bad vibration and within 15 seconds it triggered the internal overload switch. A quick check of the troubleshooting section of the manual suggested that one of the causes could be the bearings on the helical cutter. To me, that sounded like a potentially big problem and this close to the holidays, I didn't feel up to taking everything apart to get to bearings, so I simply put an air hose as close to the bearings as I could...much to my surprise a lot of shaving came flying out. After resetting the overload switch and hitting the start button, it ran as quietly and smoothly as a brand new machine! From now on, I will be periodically blowing off the bearings around the cutter...lesson learned!