The sanding belt on my belt sander will no longer remain centered. I have had to adjust the centering adjustment screw over time until now it has reached its limit. I replaced the tire which drives the sanding belt though it didn't look particularly worn which improved the situation somewhat but the sanding belt still rapidly moves half way off the sander and I can't adjust it any further. The front pulley bearings are snug, the pulley doesn't appear to be worn and the pulley rotates freely.
I am wondering if anyone else has had this problem and if anyone knows how to fix the problem.