I have heard and read in multiple sources that the top and bottom wheel on a band saw need to be aligned and in the same plane.
I had a discussion with my father who is not a wood worker, but a mechanical engineer, and his thought was that it really doesn't matter because the top and bottom wheels have an angle up to the center of the wheel. This forces the blade to move it's tracking location on the wheel from the lower edge up to wards the middle. And any difference between the two wheels is corrected in this angle shape on the wheel.
Can someone tell me why having the wheels in line with each other is important. Or direct me two a book that might explain it?
I have recently picked up a Jet Band saw, and the wheels are not in alignment by any means. I read in FWW#193 a review of the Jet and there complaint was that getting the wheels into alignment was not possible as the bearing shaft is just too short.
I'd like to understand what the reason behind bringing the two wheels into alignment is required for, before disassembling the whole unit to fix it.