Exactly, your problem is leaving the belt on the grinder with that slanted tracking wheel. Bader has the same type tracking system as the KMG.
Try not leaving any belts on your grinder for more than a few seconds if the machine isnt running.
I have burr kings and don't get my belts wet so I...
I have a friend this happens to.
If you have a KMG or similar tracking grinder you cant leave the belt on the machine with tension on it without the machine running. Either take off the belt or release the tool rest arm when done so there is no tension.
Also getting the belt wet or can cause...
I converted a variable speed baldor 48" to a 72". Put a large 1/2 steel plate under the grinder and the idler wheel assembly is attached to the plate.
I blocked off the adjustment on the idler wheel.
All adjustment is from the original baldor tracking.
Been using it for over 10 years with...