Last night I had a thought about what _might_ have happened, but I need to confirm it.? I remembered that I had? tipped my saw over to open up the gearbox and replace the gear oil (I supported it with a plywood plank at the right height).? This would put some sideways rotational force on the frame, and in the right direction if something in the support arm assembly was loose.? The bed casting isn't all that rigid either so there could have been some flex in there that caused something to shift..? One observation that supports my theory is that, while I was able to adjust the blade guides so the saw cuts pretty square in the vertical plane, the blade clearly is misaligned on the horizontal plane (and the direction is consistent with my problem).....and it WAS properly aligned at one point.
To be more specific, I'm talking about part #121 in my owner's manual for the HF #93762 bandsaw.? There it's called the "left pivot" but it also has been referred to as the "support arm".? The left end of the pivot shaft passes through it and on mine it's secured by a grub screw in the support arm.? Two adjustment/fixing bolts attach it to the frame and the support has two slots in it to permit adjusting the frame so it is horizontally square to the pivot shaft.
More later....
Mark
